diff --git a/externals/cowsay/cowsay b/externals/cowsay/cowsay
--- a/externals/cowsay/cowsay
+++ b/externals/cowsay/cowsay
@@ -56,8 +56,8 @@
 $tired = $opts{'t'};
 $wired = $opts{'w'};
 $young = $opts{'y'};
-$eyes = substr($opts{'e'}, 0, 2);
-$tongue = substr($opts{'T'}, 0, 2);
+$eyes = @substr($opts{'e'}, 0, 2);
+$tongue = @substr($opts{'T'}, 0, 2);
 $the_cow = "";
 
 &slurp_input;
diff --git a/externals/diff_match_patch/diff_match_patch.php b/externals/diff_match_patch/diff_match_patch.php
--- a/externals/diff_match_patch/diff_match_patch.php
+++ b/externals/diff_match_patch/diff_match_patch.php
@@ -101,9 +101,9 @@
 
 		// Trim off common suffix (speedup)
 		$commonlength = $this->diff_commonSuffix($text1, $text2);
-		$commonsuffix = mb_substr($text1, mb_strlen($text1) - $commonlength);
-		$text1 = mb_substr($text1, 0, mb_strlen($text1) - $commonlength);
-		$text2 = mb_substr($text2, 0, mb_strlen($text2) - $commonlength);
+		$commonsuffix = mb_substr($text1, mbstrlen($text1) - $commonlength);
+		$text1 = mb_substr($text1, 0, mbstrlen($text1) - $commonlength);
+		$text2 = mb_substr($text2, 0, mbstrlen($text2) - $commonlength);
 
 		// Compute the diff on the middle block
 		$diffs = $this->diff_compute($text1, $text2, $checklines);
@@ -142,19 +142,19 @@
 			return array ( array ( DIFF_DELETE, $text1 ) );
 		}
 
-		$longtext = mb_strlen($text1) > mb_strlen($text2) ? $text1 : $text2;
-		$shorttext = mb_strlen($text1) > mb_strlen($text2) ? $text2 : $text1;
+		$longtext = mbstrlen($text1) > mbstrlen($text2) ? $text1 : $text2;
+		$shorttext = mbstrlen($text1) > mbstrlen($text2) ? $text2 : $text1;
 		$i = mb_strpos($longtext, $shorttext);
 		if ($i !== false) {
 			// Shorter text is inside the longer text (speedup)
 			$diffs = array (
 				array ( DIFF_INSERT, mb_substr($longtext, 0, $i) ),
 				array ( DIFF_EQUAL, $shorttext ),
-				array ( DIFF_INSERT, mb_substr($longtext, $i +mb_strlen($shorttext)) )
+				array ( DIFF_INSERT, mb_substr($longtext, $i +mbstrlen($shorttext)) )
 			);
 
 			// Swap insertions for deletions if diff is reversed.
-			if (mb_strlen($text1) > mb_strlen($text2)) {
+			if (mbstrlen($text1) > mbstrlen($text2)) {
 				$diffs[0][0] = $diffs[2][0] = DIFF_DELETE;
 			}
 			return $diffs;
@@ -183,7 +183,7 @@
 		}
 
 		// Perform a real diff.
-		if ($checklines && (mb_strlen($text1) < 100 || mb_strlen($text2) < 100)) {
+		if ($checklines && (mbstrlen($text1) < 100 || mbstrlen($text2) < 100)) {
 			// Too trivial for the overhead.
 			$checklines = false;
 		}
@@ -306,10 +306,10 @@
 		$lineEnd = -1;
 		// Keeping our own length variable is faster than looking it up.
 		$lineArrayLength = count($lineArray);
-		while ($lineEnd < mb_strlen($text) - 1) {
+		while ($lineEnd < mbstrlen($text) - 1) {
 			$lineEnd = mb_strpos($text, "\n", $lineStart);
 			if ($lineEnd === false) {
-				$lineEnd = mb_strlen($text) - 1;
+				$lineEnd = mbstrlen($text) - 1;
 			}
 			$line = mb_substr($text, $lineStart, $lineEnd +1 -$lineStart);
 			$lineStart = $lineEnd +1;
@@ -335,7 +335,7 @@
 		for ($x = 0; $x < count($diffs); $x++) {
 			$chars = $diffs[$x][1];
 			$text = array ();
-			for ($y = 0; $y < mb_strlen($chars); $y++) {
+			for ($y = 0; $y < mbstrlen($chars); $y++) {
 				$text[$y] = $lineArray[charCodeAt($chars, $y)];
 			}
 			$diffs[$x][1] = implode('',$text);
@@ -355,8 +355,8 @@
 		$ms_end = microtime(true) + $this->Diff_Timeout;
 		
 		// Cache the text lengths to prevent multiple calls.
-		$text1_length = mb_strlen($text1);
-		$text2_length = mb_strlen($text2);
+		$text1_length = mbstrlen($text1);
+		$text2_length = mbstrlen($text2);
 		$max_d = $text1_length + $text2_length -1;
 		$doubleEnd = $this->Diff_DualThreshold * 2 < $max_d;
 		$v_map1 = array();
@@ -481,8 +481,8 @@
 	 */
 	function diff_path1($v_map, $text1, $text2) {
 		$path = array ();
-		$x = mb_strlen($text1);
-		$y = mb_strlen($text2);
+		$x = mbstrlen($text1);
+		$y = mbstrlen($text2);
 		/** @type {number?} */
 		$last_op = null;
 		for ($d = count($v_map) - 2; $d >= 0; $d--) {
@@ -543,8 +543,8 @@
 	function diff_path2($v_map, $text1, $text2) {
 		$path = array ();
 		$pathLength = 0;
-		$x = mb_strlen($text1);
-		$y = mb_strlen($text2);
+		$x = mbstrlen($text1);
+		$y = mbstrlen($text2);
 		/** @type {number?} */
 		$last_op = null;
 		for ($d = count($v_map) - 2; $d >= 0; $d--) {
@@ -552,11 +552,11 @@
 				if (isset ($v_map[$d][($x -1) . ',' . $y])) {
 					$x--;
 					if ($last_op === DIFF_DELETE) {
-						$path[$pathLength -1][1] .= $text1[mb_strlen($text1) - $x -1];
+						$path[$pathLength -1][1] .= $text1[mbstrlen($text1) - $x -1];
 					} else {
 						$path[$pathLength++] = array (
 							DIFF_DELETE,
-							$text1[mb_strlen($text1) - $x -1]
+							$text1[mbstrlen($text1) - $x -1]
 						);
 					}
 					$last_op = DIFF_DELETE;
@@ -565,11 +565,11 @@
 				elseif (isset ($v_map[$d][$x . ',' . ($y -1)])) {
 					$y--;
 					if ($last_op === DIFF_INSERT) {
-						$path[$pathLength -1][1] .= $text2[mb_strlen($text2) - $y -1];
+						$path[$pathLength -1][1] .= $text2[mbstrlen($text2) - $y -1];
 					} else {
 						$path[$pathLength++] = array (
 							DIFF_INSERT,
-							$text2[mb_strlen($text2) - $y -1]
+							$text2[mbstrlen($text2) - $y -1]
 						);
 					}
 					$last_op = DIFF_INSERT;
@@ -582,11 +582,11 @@
 					//  throw new Error('No diagonal.  Can\'t happen. (diff_path2)');
 					//}
 					if ($last_op === DIFF_EQUAL) {
-						$path[$pathLength -1][1] .= $text1[mb_strlen($text1) - $x -1];
+						$path[$pathLength -1][1] .= $text1[mbstrlen($text1) - $x -1];
 					} else {
 						$path[$pathLength++] = array (
 							DIFF_EQUAL,
-							$text1[mb_strlen($text1) - $x -1]
+							$text1[mbstrlen($text1) - $x -1]
 						);
 					}
 					$last_op = DIFF_EQUAL;
@@ -633,16 +633,16 @@
 	 *     text2 and the common middle.  Or null if there was no match.
 	 */
 	function diff_halfMatch($text1, $text2) {
-		$longtext = mb_strlen($text1) > mb_strlen($text2) ? $text1 : $text2;
-		$shorttext = mb_strlen($text1) > mb_strlen($text2) ? $text2 : $text1;
-		if (mb_strlen($longtext) < 10 || mb_strlen($shorttext) < 1) {
+		$longtext = mbstrlen($text1) > mbstrlen($text2) ? $text1 : $text2;
+		$shorttext = mbstrlen($text1) > mbstrlen($text2) ? $text2 : $text1;
+		if (mbstrlen($longtext) < 10 || mbstrlen($shorttext) < 1) {
 			return null; // Pointless.
 		}
 
 		// First check if the second quarter is the seed for a half-match.
-		$hm1 = $this->diff_halfMatchI($longtext, $shorttext, ceil(mb_strlen($longtext) / 4));
+		$hm1 = $this->diff_halfMatchI($longtext, $shorttext, ceil(mbstrlen($longtext) / 4));
 		// Check again based on the third quarter.
-		$hm2 = $this->diff_halfMatchI($longtext, $shorttext, ceil(mb_strlen($longtext) / 2));
+		$hm2 = $this->diff_halfMatchI($longtext, $shorttext, ceil(mbstrlen($longtext) / 2));
 
 		if (!$hm1 && !$hm2) {
 			return null;
@@ -652,11 +652,11 @@
 			$hm = $hm2;
 		} else {
 			// Both matched.  Select the longest.
-			$hm = mb_strlen($hm1[4]) > mb_strlen($hm2[4]) ? $hm1 : $hm2;
+			$hm = mbstrlen($hm1[4]) > mbstrlen($hm2[4]) ? $hm1 : $hm2;
 		}
 
 		// A half-match was found, sort out the return data.
-		if (mb_strlen($text1) > mb_strlen($text2)) {
+		if (mbstrlen($text1) > mbstrlen($text2)) {
 			$text1_a = $hm[0];
 			$text1_b = $hm[1];
 			$text2_a = $hm[2];
@@ -685,7 +685,7 @@
 	 */
 	function diff_halfMatchI($longtext, $shorttext, $i) {
 		// Start with a 1/4 length mb_substring at position i as a seed.
-		$seed = mb_substr($longtext, $i, floor(mb_strlen($longtext) / 4));
+		$seed = mb_substr($longtext, $i, floor(mbstrlen($longtext) / 4));
 
 		$j = -1;
 		$best_common = '';
@@ -696,7 +696,7 @@
 		while ( ($j = mb_strpos($shorttext, $seed, $j + 1)) !== false ) {
 			$prefixLength = $this->diff_commonPrefix(mb_substr($longtext, $i), mb_substr($shorttext, $j));
 			$suffixLength = $this->diff_commonSuffix(mb_substr($longtext, 0, $i), mb_substr($shorttext, 0, $j));
-			if (mb_strlen($best_common) < $suffixLength + $prefixLength) {
+			if (mbstrlen($best_common) < $suffixLength + $prefixLength) {
 				$best_common = mb_substr($shorttext, $j - $suffixLength, $suffixLength) . mb_substr($shorttext, $j, $prefixLength);
 				$best_longtext_a = mb_substr($longtext, 0, $i - $suffixLength);
 				$best_longtext_b = mb_substr($longtext, $i + $prefixLength);
@@ -704,7 +704,7 @@
 				$best_shorttext_b = mb_substr($shorttext, $j + $prefixLength);
 			}
 		}
-		if (mb_strlen($best_common) >= mb_strlen($longtext) / 2) {
+		if (mbstrlen($best_common) >= mbstrlen($longtext) / 2) {
 			return array (
 				$best_longtext_a,
 				$best_longtext_b,
@@ -738,8 +738,8 @@
 				$length_changes2 = 0;
 				$lastequality = $diffs[$pointer][1];
 			} else { // an insertion or deletion
-				$length_changes2 += mb_strlen($diffs[$pointer][1]);
-				if ($lastequality !== null && (mb_strlen($lastequality) <= $length_changes1) && (mb_strlen($lastequality) <= $length_changes2)) {
+				$length_changes2 += mbstrlen($diffs[$pointer][1]);
+				if ($lastequality !== null && (mbstrlen($lastequality) <= $length_changes1) && (mbstrlen($lastequality) <= $length_changes2)) {
 					// Duplicate record
 					$zzz_diffs = array_splice($diffs, $equalities[$equalitiesLength -1], 0, array(array (
 						DIFF_DELETE,
@@ -786,9 +786,9 @@
 				// First, shift the edit as far left as possible.
 				$commonOffset = $this->diff_commonSuffix($equality1, $edit);
 				if ($commonOffset !== '') {
-					$commonString = mb_substr($edit, mb_strlen($edit) - $commonOffset);
-					$equality1 = mb_substr($equality1, 0, mb_strlen($equality1) - $commonOffset);
-					$edit = $commonString . mb_substr($edit, 0, mb_strlen($edit) - $commonOffset);
+					$commonString = mb_substr($edit, mbstrlen($edit) - $commonOffset);
+					$equality1 = mb_substr($equality1, 0, mbstrlen($equality1) - $commonOffset);
+					$edit = $commonString . mb_substr($edit, 0, mbstrlen($edit) - $commonOffset);
 					$equality2 = $commonString . $equality2;
 				}
 
@@ -861,16 +861,16 @@
 		// rather than force total conformity.
 		$score = 0;
 		// One point for non-alphanumeric.
-		if (preg_match($punctuation, $one[mb_strlen($one) - 1]) || preg_match($punctuation, $two[0])) {
+		if (@preg_match($punctuation, $one[mbstrlen($one) - 1]) || @preg_match($punctuation, $two[0])) {
 			$score++;
 			// Two points for whitespace.
-			if (preg_match($whitespace, $one[mb_strlen($one) - 1] ) || preg_match($whitespace, $two[0])) {
+			if (@preg_match($whitespace, $one[mbstrlen($one) - 1] ) || @preg_match($whitespace, $two[0])) {
 				$score++;
 				// Three points for line breaks.
-				if (preg_match($linebreak, $one[mb_strlen($one) - 1]) || preg_match($linebreak, $two[0])) {
+				if (@preg_match($linebreak, $one[mbstrlen($one) - 1]) || @preg_match($linebreak, $two[0])) {
 					$score++;
 					// Four points for blank lines.
-					if (preg_match($blanklineEnd, $one) || preg_match($blanklineStart, $two)) {
+					if (@preg_match($blanklineEnd, $one) || @preg_match($blanklineStart, $two)) {
 						$score++;
 					}
 				}
@@ -899,7 +899,7 @@
 		$post_del = false;
 		while ($pointer < count($diffs)) {
 			if ($diffs[$pointer][0] == DIFF_EQUAL) { // equality found
-				if (mb_strlen($diffs[$pointer][1]) < $this->Diff_EditCost && ($post_ins || $post_del)) {
+				if (mbstrlen($diffs[$pointer][1]) < $this->Diff_EditCost && ($post_ins || $post_del)) {
 					// Candidate found.
 					$equalities[$equalitiesLength++] = $pointer;
 					$pre_ins = $post_ins;
@@ -925,7 +925,7 @@
 				 * <ins>A</del>X<ins>C</ins><del>D</del>
 				 * <ins>A</ins><del>B</del>X<del>C</del>
 				 */
-				if ($lastequality && (($pre_ins && $pre_del && $post_ins && $post_del) || ((mb_strlen($lastequality) < $this->Diff_EditCost / 2) && ($pre_ins + $pre_del + $post_ins + $post_del) == 3))) {
+				if ($lastequality && (($pre_ins && $pre_del && $post_ins && $post_del) || ((mbstrlen($lastequality) < $this->Diff_EditCost / 2) && ($pre_ins + $pre_del + $post_ins + $post_del) == 3))) {
 					// Duplicate record
 					$zzz_diffs = array_splice($diffs, $equalities[$equalitiesLength -1], 0, array(array (
 						DIFF_DELETE,
@@ -1002,9 +1002,9 @@
 							// Factor out any common suffixies.
 							$commonlength = $this->diff_commonSuffix($text_insert, $text_delete);
 							if ($commonlength !== 0) {
-								$diffs[$pointer][1] = mb_substr($text_insert, mb_strlen($text_insert) - $commonlength) . $diffs[$pointer][1];
-								$text_insert = mb_substr($text_insert, 0, mb_strlen($text_insert) - $commonlength);
-								$text_delete = mb_substr($text_delete, 0, mb_strlen($text_delete) - $commonlength);
+								$diffs[$pointer][1] = mb_substr($text_insert, mbstrlen($text_insert) - $commonlength) . $diffs[$pointer][1];
+								$text_insert = mb_substr($text_insert, 0, mbstrlen($text_insert) - $commonlength);
+								$text_delete = mb_substr($text_delete, 0, mbstrlen($text_delete) - $commonlength);
 							}
 						}
 						// Delete the offending records and add the merged ones.
@@ -1055,17 +1055,17 @@
 		while ($pointer < count($diffs) - 1) {
 			if ($diffs[$pointer-1][0] == DIFF_EQUAL && $diffs[$pointer+1][0] == DIFF_EQUAL) {
 				// This is a single edit surrounded by equalities.
-				if ( mb_substr($diffs[$pointer][1], mb_strlen($diffs[$pointer][1]) - mb_strlen($diffs[$pointer -1][1])) == $diffs[$pointer -1][1]) {
+				if ( mb_substr($diffs[$pointer][1], mbstrlen($diffs[$pointer][1]) - mbstrlen($diffs[$pointer -1][1])) == $diffs[$pointer -1][1]) {
 					// Shift the edit over the previous equality.
-					$diffs[$pointer][1] = $diffs[$pointer -1][1] . mb_substr($diffs[$pointer][1], 0, mb_strlen($diffs[$pointer][1]) - mb_strlen($diffs[$pointer -1][1]));
+					$diffs[$pointer][1] = $diffs[$pointer -1][1] . mb_substr($diffs[$pointer][1], 0, mbstrlen($diffs[$pointer][1]) - mbstrlen($diffs[$pointer -1][1]));
 					$diffs[$pointer +1][1] = $diffs[$pointer -1][1] . $diffs[$pointer +1][1];
 					array_splice($diffs, $pointer -1, 1);
 					$changes = true;
-				} elseif (mb_substr($diffs[$pointer][1], 0, mb_strlen($diffs[$pointer +1][1])) == $diffs[$pointer +1][1]) {
+				} elseif (mb_substr($diffs[$pointer][1], 0, mbstrlen($diffs[$pointer +1][1])) == $diffs[$pointer +1][1]) {
 					// Shift the edit over the next equality.
 					$diffs[$pointer -1][1] .= $diffs[$pointer +1][1];
 
-					$diffs[$pointer][1] = mb_substr($diffs[$pointer][1], mb_strlen($diffs[$pointer +1][1])) . $diffs[$pointer +1][1];
+					$diffs[$pointer][1] = mb_substr($diffs[$pointer][1], mbstrlen($diffs[$pointer +1][1])) . $diffs[$pointer +1][1];
 					array_splice($diffs, $pointer +1, 1);
 					$changes = true;
 				}
@@ -1093,10 +1093,10 @@
 		$last_chars2 = 0;
 		for ($x = 0; $x < count($diffs); $x++) {
 			if ($diffs[$x][0] !== DIFF_INSERT) { // Equality or deletion.
-				$chars1 += mb_strlen($diffs[$x][1]);
+				$chars1 += mbstrlen($diffs[$x][1]);
 			}
 			if ($diffs[$x][0] !== DIFF_DELETE) { // Equality or insertion.
-				$chars2 += mb_strlen($diffs[$x][1]);
+				$chars2 += mbstrlen($diffs[$x][1]);
 			}
 			if ($chars1 > $loc) { // Overshot the location.
 				break;
@@ -1147,7 +1147,7 @@
 					break;
 			}
 			if ($op !== DIFF_DELETE) {
-				$i += mb_strlen($data);
+				$i += mbstrlen($data);
 			}
 		}
 		return implode('',$html);
@@ -1198,10 +1198,10 @@
 			$data = $diffs[$x][1];
 			switch ($op) {
 				case DIFF_INSERT :
-					$insertions += mb_strlen($data);
+					$insertions += mbstrlen($data);
 					break;
 				case DIFF_DELETE :
-					$deletions += mb_strlen($data);
+					$deletions += mbstrlen($data);
 					break;
 				case DIFF_EQUAL :
 					// A deletion and an insertion is one substitution.
@@ -1231,10 +1231,10 @@
 					$text[$x] = '+' .encodeURI($diffs[$x][1]);
 					break;
 				case DIFF_DELETE :
-					$text[$x] = '-' .mb_strlen($diffs[$x][1]);
+					$text[$x] = '-' .mbstrlen($diffs[$x][1]);
 					break;
 				case DIFF_EQUAL :
-					$text[$x] = '=' .mb_strlen($diffs[$x][1]);
+					$text[$x] = '=' .mbstrlen($diffs[$x][1]);
 					break;
 			}
 		}
@@ -1300,9 +1300,9 @@
 					}
 			}
 		}
-		if ($pointer != mb_strlen($text1)) {
-//			throw new Exception('Delta length (' . $pointer . ') does not equal source text length (' . mb_strlen($text1) . ').');
-			echo_Exception('Delta length (' . $pointer . ') does not equal source text length (' . mb_strlen($text1) . ').');
+		if ($pointer != mbstrlen($text1)) {
+//			throw new Exception('Delta length (' . $pointer . ') does not equal source text length (' . mbstrlen($text1) . ').');
+			echo_Exception('Delta length (' . $pointer . ') does not equal source text length (' . mbstrlen($text1) . ').');
 		}
 		return $diffs;
 	}
@@ -1317,16 +1317,16 @@
 	 * @return {number} Best match index or -1.
 	 */
 	function match_main($text, $pattern, $loc) {
-		$loc = max(0, min($loc, mb_strlen($text)));
+		$loc = max(0, min($loc, mbstrlen($text)));
 		if ($text == $pattern) {
 			// Shortcut (potentially not guaranteed by the algorithm)
 			return 0;
 		}
-		elseif (!mb_strlen($text)) {
+		elseif (!mbstrlen($text)) {
 			// Nothing to match.
 			return -1;
 		}
-		elseif (mb_substr($text, $loc, mb_strlen($pattern)) == $pattern) {
+		elseif (mb_substr($text, $loc, mbstrlen($pattern)) == $pattern) {
 			// Perfect match at the perfect spot!  (Includes case of null pattern)
 			return $loc;
 		} else {
@@ -1345,7 +1345,7 @@
 	 * @private
 	 */
 	function match_bitap($text, $pattern, $loc) {
-		if (mb_strlen($pattern) > Match_MaxBits) {
+		if (mbstrlen($pattern) > Match_MaxBits) {
 			echo_Exception('Pattern too long for this browser.');
 		}
 
@@ -1362,20 +1362,20 @@
 		}
 
 		// What about in the other direction? (speedup)
-		$best_loc = mb_strrpos( $text, $pattern, min($loc + mb_strlen($pattern), mb_strlen($text)) );
+		$best_loc = mb_strrpos( $text, $pattern, min($loc + mbstrlen($pattern), mbstrlen($text)) );
 		if ($best_loc !== false) {
 			$score_threshold = min($this->match_bitapScore(0, $best_loc, $pattern, $loc), $score_threshold);
 		}
 
 		// Initialise the bit arrays.
-		$matchmask = 1 << (mb_strlen($pattern) - 1);
+		$matchmask = 1 << (mbstrlen($pattern) - 1);
 		$best_loc = -1;
 
 		$bin_min = null;
 		$bin_mid = null;
-		$bin_max = mb_strlen($pattern) + mb_strlen($text);
+		$bin_max = mbstrlen($pattern) + mbstrlen($text);
 		$last_rd = null;
-		for ($d = 0; $d < mb_strlen($pattern); $d++) {
+		for ($d = 0; $d < mbstrlen($pattern); $d++) {
 			// Scan for the best match; each iteration allows for one more error.
 			// Run a binary search to determine how far from 'loc' we can stray at this
 			// error level.
@@ -1392,7 +1392,7 @@
 			// Use the result from this iteration as the maximum for the next.
 			$bin_max = $bin_mid;
 			$start = max(1, $loc - $bin_mid +1);
-			$finish = min($loc + $bin_mid, mb_strlen($text)) + mb_strlen($pattern);
+			$finish = min($loc + $bin_mid, mbstrlen($text)) + mbstrlen($pattern);
 
 			$rd = Array (
 				$finish +2
@@ -1443,7 +1443,7 @@
 	 * @private
 	 */
 	function match_bitapScore($e, $x, $pattern, $loc) {
-		$accuracy = $e / mb_strlen($pattern);
+		$accuracy = $e / mbstrlen($pattern);
 		$proximity = abs($loc - $x);
 		if (!$this->Match_Distance) {
 			// Dodge divide by zero error.
@@ -1460,11 +1460,11 @@
 	 */
 	function match_alphabet($pattern) {
 		$s = array ();
-		for ($i = 0; $i < mb_strlen($pattern); $i++) {
+		for ($i = 0; $i < mbstrlen($pattern); $i++) {
 			$s[ $pattern[$i] ] = 0;
 		}
-		for ($i = 0; $i < mb_strlen($pattern); $i++) {
-			$s[ $pattern[$i] ] |= 1 << (mb_strlen($pattern) - $i - 1);
+		for ($i = 0; $i < mbstrlen($pattern); $i++) {
+			$s[ $pattern[$i] ] |= 1 << (mbstrlen($pattern) - $i - 1);
 		}
 		return $s;
 	}
@@ -1484,11 +1484,11 @@
 		$padding = 0;
 		$i = 0;
 		while (
-			(   mb_strlen($pattern) === 0 // Javascript's indexOf/lastIndexOd return 0/strlen respectively if pattern = ''
+			(   mbstrlen($pattern) === 0 // Javascript's indexOf/lastIndexOd return 0/strlen respectively if pattern = ''
 			 || mb_strpos($text, $pattern) !== mb_strrpos($text, $pattern)
 			)
 			&& $pattern !== $previousPattern // avoid infinte loop
-			&& mb_strlen($pattern) < Match_MaxBits - $this->Patch_Margin - $this->Patch_Margin ) {
+			&& mbstrlen($pattern) < Match_MaxBits - $this->Patch_Margin - $this->Patch_Margin ) {
 			$padding += $this->Patch_Margin;
 			$previousPattern = $pattern;
 			$pattern = mb_substr($text, max($patch->start2 - $padding,0), ($patch->start2 + $patch->length1 + $padding) - max($patch->start2 - $padding,0) );
@@ -1513,11 +1513,11 @@
 		}
 
 		// Roll back the start points.
-		$patch->start1 -= mb_strlen($prefix);
-		$patch->start2 -= mb_strlen($prefix);
+		$patch->start1 -= mbstrlen($prefix);
+		$patch->start2 -= mbstrlen($prefix);
 		// Extend the lengths.
-		$patch->length1 += mb_strlen($prefix) + mb_strlen($suffix);
-		$patch->length2 += mb_strlen($prefix) + mb_strlen($suffix);
+		$patch->length1 += mbstrlen($prefix) + mbstrlen($suffix);
+		$patch->length2 += mbstrlen($prefix) + mbstrlen($suffix);
 	}
 
 	/**
@@ -1596,21 +1596,21 @@
 			switch ($diff_type) {
 				case DIFF_INSERT :
 					$patch->diffs[$patchDiffLength++] = $diffs[$x];
-					$patch->length2 += mb_strlen($diff_text);
+					$patch->length2 += mbstrlen($diff_text);
 					$postpatch_text = mb_substr($postpatch_text, 0, $char_count2) . $diff_text . mb_substr($postpatch_text,$char_count2);
 					break;
 				case DIFF_DELETE :
-					$patch->length1 += mb_strlen($diff_text);
+					$patch->length1 += mbstrlen($diff_text);
 					$patch->diffs[$patchDiffLength++] = $diffs[$x];
-					$postpatch_text = mb_substr($postpatch_text, 0, $char_count2) . mb_substr($postpatch_text, $char_count2 + mb_strlen($diff_text) );
+					$postpatch_text = mb_substr($postpatch_text, 0, $char_count2) . mb_substr($postpatch_text, $char_count2 + mbstrlen($diff_text) );
 					break;
 				case DIFF_EQUAL :
-					if ( mb_strlen($diff_text) <= 2 * $this->Patch_Margin && $patchDiffLength && count($diffs) != $x + 1) {
+					if ( mbstrlen($diff_text) <= 2 * $this->Patch_Margin && $patchDiffLength && count($diffs) != $x + 1) {
 						// Small equality inside a patch.
 						$patch->diffs[$patchDiffLength++] = $diffs[$x];
-						$patch->length1 += mb_strlen($diff_text);
-						$patch->length2 += mb_strlen($diff_text);
-					} elseif ( mb_strlen($diff_text) >= 2 * $this->Patch_Margin ) {
+						$patch->length1 += mbstrlen($diff_text);
+						$patch->length2 += mbstrlen($diff_text);
+					} elseif ( mbstrlen($diff_text) >= 2 * $this->Patch_Margin ) {
 						// Time for a new patch.
 						if ($patchDiffLength) {
 							$this->patch_addContext($patch, $prepatch_text);
@@ -1630,10 +1630,10 @@
 
 			// Update the current character count.
 			if ($diff_type !== DIFF_INSERT) {
-				$char_count1 += mb_strlen($diff_text);
+				$char_count1 += mbstrlen($diff_text);
 			}
 			if ($diff_type !== DIFF_DELETE) {
-				$char_count2 += mb_strlen($diff_text);
+				$char_count2 += mbstrlen($diff_text);
 			}
 		}
 		// Pick up the leftover patch if not empty.
@@ -1699,12 +1699,12 @@
 			$text1 = $this->diff_text1($patches[$x]->diffs);
 			$start_loc = null;
 			$end_loc = -1;
-			if (mb_strlen($text1) > Match_MaxBits) {
+			if (mbstrlen($text1) > Match_MaxBits) {
 				// patch_splitMax will only provide an oversized pattern in the case of
 				// a monster delete.
 				$start_loc = $this->match_main($text, mb_substr($text1, 0, Match_MaxBits ), $expected_loc);
 				if ($start_loc != -1) {
-					$end_loc = $this->match_main($text, mb_substr($text1,mb_strlen($text1) - Match_MaxBits), $expected_loc + mb_strlen($text1) - Match_MaxBits);
+					$end_loc = $this->match_main($text, mb_substr($text1,mbstrlen($text1) - Match_MaxBits), $expected_loc + mbstrlen($text1) - Match_MaxBits);
 					if ($end_loc == -1 || $start_loc >= $end_loc) {
 						// Can't find valid trailing context.  Drop this patch.
 						$start_loc = -1;
@@ -1724,18 +1724,18 @@
 				$delta = $start_loc - $expected_loc;
 				$text2 = null;
 				if ($end_loc == -1) {
-					$text2 = mb_substr($text, $start_loc, mb_strlen($text1) );
+					$text2 = mb_substr($text, $start_loc, mbstrlen($text1) );
 				} else {
 					$text2 = mb_substr($text, $start_loc, $end_loc + Match_MaxBits - $start_loc);
 				}
 				if ($text1 == $text2) {
 					// Perfect match, just shove the replacement text in.
-					$text = mb_substr($text, 0, $start_loc) . $this->diff_text2($patches[$x]->diffs) . mb_substr($text,$start_loc + mb_strlen($text1) );
+					$text = mb_substr($text, 0, $start_loc) . $this->diff_text2($patches[$x]->diffs) . mb_substr($text,$start_loc + mbstrlen($text1) );
 				} else {
 					// Imperfect match.  Run a diff to get a framework of equivalent
 					// indices.
 					$diffs = $this->diff_main($text1, $text2, false);
-					if ( mb_strlen($text1) > Match_MaxBits && $this->diff_levenshtein($diffs) / mb_strlen($text1) > $this->Patch_DeleteThreshold) {
+					if ( mbstrlen($text1) > Match_MaxBits && $this->diff_levenshtein($diffs) / mbstrlen($text1) > $this->Patch_DeleteThreshold) {
 						// The end points match, but the content is unacceptably bad.
 						$results[$x] = false;
 					} else {
@@ -1750,10 +1750,10 @@
 							if ($mod[0] === DIFF_INSERT) { // Insertion
 								$text = mb_substr($text, 0, $start_loc + $index2) . $mod[1] . mb_substr($text, $start_loc + $index2);
 							} elseif ($mod[0] === DIFF_DELETE) { // Deletion
-								$text = mb_substr($text, 0, $start_loc + $index2) . mb_substr($text,$start_loc + $this->diff_xIndex($diffs, $index1 + mb_strlen($mod[1]) ));
+								$text = mb_substr($text, 0, $start_loc + $index2) . mb_substr($text,$start_loc + $this->diff_xIndex($diffs, $index1 + mbstrlen($mod[1]) ));
 							}
 							if ($mod[0] !== DIFF_DELETE) {
-								$index1 += mb_strlen($mod[1]);
+								$index1 += mbstrlen($mod[1]);
 							}
 						}
 					}
@@ -1761,7 +1761,7 @@
 			}
 		}
 		// Strip the padding off.
-		$text = mb_substr($text, mb_strlen($nullPadding), mb_strlen($text) - 2*mb_strlen($nullPadding) );
+		$text = mb_substr($text, mbstrlen($nullPadding), mbstrlen($text) - 2*mbstrlen($nullPadding) );
 		return array($text, $results);
 	}
 
@@ -1794,10 +1794,10 @@
 			$patch->start2 -= $paddingLength; // Should be 0.
 			$patch->length1 += $paddingLength;
 			$patch->length2 += $paddingLength;
-		} elseif ($paddingLength > mb_strlen($diffs[0][1]) ) {
+		} elseif ($paddingLength > mbstrlen($diffs[0][1]) ) {
 			// Grow first equality.
-			$extraLength = $paddingLength - mb_strlen($diffs[0][1]);
-			$diffs[0][1] = mb_substr( $nullPadding , mb_strlen($diffs[0][1]) ) . $diffs[0][1];
+			$extraLength = $paddingLength - mbstrlen($diffs[0][1]);
+			$diffs[0][1] = mb_substr( $nullPadding , mbstrlen($diffs[0][1]) ) . $diffs[0][1];
 			$patch->start1 -= $extraLength;
 			$patch->start2 -= $extraLength;
 			$patch->length1 += $extraLength;
@@ -1812,9 +1812,9 @@
 			array_push($diffs, array(DIFF_EQUAL, $nullPadding) );
 			$patch->length1 += $paddingLength;
 			$patch->length2 += $paddingLength;
-		} elseif ($paddingLength > mb_strlen( $diffs[count($diffs)-1][1] ) ) {
+		} elseif ($paddingLength > mbstrlen( $diffs[count($diffs)-1][1] ) ) {
 			// Grow last equality.
-			$extraLength = $paddingLength - mb_strlen( $diffs[count($diffs)-1][1] );
+			$extraLength = $paddingLength - mbstrlen( $diffs[count($diffs)-1][1] );
 			$diffs[ count($diffs)-1][1] .= mb_substr($nullPadding,0,$extraLength);
 			$patch->length1 += $extraLength;
 			$patch->length2 += $extraLength;
@@ -1842,10 +1842,10 @@
 					// Create one of several smaller patches.
 					$patch = new patch_obj();
 					$empty = true;
-					$patch->start1 = $start1 - mb_strlen($precontext);
-					$patch->start2 = $start2 - mb_strlen($precontext);
+					$patch->start1 = $start1 - mbstrlen($precontext);
+					$patch->start2 = $start2 - mbstrlen($precontext);
 					if ($precontext !== '') {
-						$patch->length1 = $patch->length2 = mb_strlen($precontext);
+						$patch->length1 = $patch->length2 = mbstrlen($precontext);
 						array_push($patch->diffs, array(DIFF_EQUAL, $precontext) );
 					}
 					while ( count($bigpatch->diffs) !== 0 && $patch->length1 < $patch_size - $this->Patch_Margin) {
@@ -1853,26 +1853,26 @@
 						$diff_text = $bigpatch->diffs[0][1];
 						if ($diff_type === DIFF_INSERT) {
 							// Insertions are harmless.
-							$patch->length2 += mb_strlen($diff_text);
-							$start2 += mb_strlen($diff_text);
+							$patch->length2 += mbstrlen($diff_text);
+							$start2 += mbstrlen($diff_text);
 							array_push($patch->diffs, array_shift($bigpatch->diffs) );
 							$empty = false;
 						} else
-							if ($diff_type === DIFF_DELETE && count($patch->diffs) == 1 && $patch->diffs[0][0] == DIFF_EQUAL && (mb_strlen($diff_text) > 2 * $patch_size) ) {
+							if ($diff_type === DIFF_DELETE && count($patch->diffs) == 1 && $patch->diffs[0][0] == DIFF_EQUAL && (mbstrlen($diff_text) > 2 * $patch_size) ) {
 								// This is a large deletion.  Let it pass in one chunk.
-								$patch->length1 += mb_strlen($diff_text);
-								$start1 += mb_strlen($diff_text);
+								$patch->length1 += mbstrlen($diff_text);
+								$start1 += mbstrlen($diff_text);
 								$empty = false;
 								array_push( $patch->diffs, array($diff_type, $diff_text) );
 								array_shift($bigpatch->diffs);
 							} else {
 								// Deletion or equality.  Only take as much as we can stomach.
 								$diff_text = mb_substr($diff_text, 0, $patch_size - $patch->length1 - $this->Patch_Margin);
-								$patch->length1 += mb_strlen($diff_text);
-								$start1 += mb_strlen($diff_text);
+								$patch->length1 += mbstrlen($diff_text);
+								$start1 += mbstrlen($diff_text);
 								if ($diff_type === DIFF_EQUAL) {
-									$patch->length2 += mb_strlen($diff_text);
-									$start2 += mb_strlen($diff_text);
+									$patch->length2 += mbstrlen($diff_text);
+									$start2 += mbstrlen($diff_text);
 								} else {
 									$empty = false;
 								}
@@ -1880,18 +1880,18 @@
 								if ($diff_text == $bigpatch->diffs[0][1]) {
 									array_shift($bigpatch->diffs);
 								} else {
-									$bigpatch->diffs[0][1] = mb_substr( $bigpatch->diffs[0][1],mb_strlen($diff_text) );
+									$bigpatch->diffs[0][1] = mb_substr( $bigpatch->diffs[0][1],mbstrlen($diff_text) );
 								}
 							}
 					}
 					// Compute the head context for the next patch.
 					$precontext = $this->diff_text2($patch->diffs);
-					$precontext = mb_substr($precontext, mb_strlen($precontext)-$this->Patch_Margin);
+					$precontext = mb_substr($precontext, mbstrlen($precontext)-$this->Patch_Margin);
 					// Append the end context for this patch.
 					$postcontext = mb_substr( $this->diff_text1($bigpatch->diffs), 0, $this->Patch_Margin );
 					if ($postcontext !== '') {
-						$patch->length1 += mb_strlen($postcontext);
-						$patch->length2 += mb_strlen($postcontext);
+						$patch->length1 += mbstrlen($postcontext);
+						$patch->length2 += mbstrlen($postcontext);
 						if ( count($patch->diffs) !== 0 && $patch->diffs[ count($patch->diffs) - 1][0] === DIFF_EQUAL) {
 							$patch->diffs[ count($patch->diffs) - 1][1] .= $postcontext;
 						} else {
@@ -1930,12 +1930,12 @@
 		if ($textline === '') {
 			return $patches;
 		}
-		$text = explode("\n",$textline);
+		$text = @explode("\n",$textline);
 		foreach($text as $i=>$t){ if($t===''){ unset($text[$i]); } }
 		$textPointer = 0;
 		while ($textPointer < count($text) ) {
 			$m = null;
-			preg_match('/^@@ -(\d+),?(\d*) \+(\d+),?(\d*) @@$/',$text[$textPointer],$m);
+			@preg_match('/^@@ -(\d+),?(\d*) \+(\d+),?(\d*) @@$/',$text[$textPointer],$m);
 			if (!$m) {
 				echo_Exception('Invalid patch string: ' . $text[$textPointer]);
 			}
@@ -2070,8 +2070,8 @@
 }
 function mb_ord($v) {
 	$k = mb_convert_encoding($v, 'UCS-2LE', 'UTF-8'); 
-	$k1 = ord(substr($k, 0, 1)); 
-	$k2 = ord(substr($k, 1, 1)); 
+	$k1 = ord(@substr($k, 0, 1)); 
+	$k2 = ord(@substr($k, 1, 1)); 
 	return $k2 * 256 + $k1; 
 }
 function mb_chr($num){
diff --git a/externals/figlet/chkfont.c b/externals/figlet/chkfont.c
--- a/externals/figlet/chkfont.c
+++ b/externals/figlet/chkfont.c
@@ -88,8 +88,8 @@
     *s = toupper(*s);
     }
 
-  if (strlen(path)<strlen(suffix)) return 1;
-  s = path + strlen(path) - strlen(suffix);
+  if (@strlen(path)<@strlen(suffix)) return 1;
+  s = path + @strlen(path) - @strlen(suffix);
   if (strcmp(s,suffix) == 0) return 0;
   if (strcmp(s,ucsuffix) == 0) return 0;
   return 1;
@@ -128,7 +128,7 @@
     weregone(1); if (gone) return;
     }
   currline++;
-  len=strlen(fileline)-1;
+  len=@strlen(fileline)-1;
   if (len>maxlinelength) {
     maxlinelength=len;
     }
@@ -143,7 +143,7 @@
   for(;k>=0?(fileline[k]=='\n' || fileline[k]==endmark):0;k--) {
     fileline[k]='\0';
     }
-  newlen=strlen(fileline);
+  newlen=@strlen(fileline);
   for (l=0;l<newlen ? fileline[l]==' ' : 0;l++) ;
   leadblanks = l;
   for (l=newlen-1;l>=0 ? fileline[l]==' ' : 0;l--) ;
@@ -265,7 +265,7 @@
 if (fgets(fileline,1001,fontfile)==NULL) {
   fileline[0] = '\0';
   }
-if (strlen(fileline)>0 ? fileline[strlen(fileline)-1]!='\n' : 0) {
+if (@strlen(fileline)>0 ? fileline[@strlen(fileline)-1]!='\n' : 0) {
   while(k=getc(fontfile),k!='\n'&&k!=EOF) ; /* Advance to end of line */
   }
 numsread=sscanf(fileline,"%c %d %d %d %d %d %d %d %d",
@@ -371,7 +371,7 @@
 oldord=0;
 while(fgets(fileline,maxlen+1000,fontfile)!=NULL) {
   currline++;
-  len=strlen(fileline)-1;
+  len=@strlen(fileline)-1;
   if (len-100>maxlinelength) {
     maxlinelength=len-100;
     }
diff --git a/externals/figlet/figlet.c b/externals/figlet/figlet.c
--- a/externals/figlet/figlet.c
+++ b/externals/figlet/figlet.c
@@ -79,7 +79,7 @@
 
 #include "zipio.h"     /* Package for reading compressed files */
 
-#define MYSTRLEN(x) ((int)strlen(x)) /* Eliminate ANSI problem */
+#define MYSTRLEN(x) ((int)@strlen(x)) /* Eliminate ANSI problem */
 
 #define DIRSEP '/'
 #define DIRSEP2 '\\'
diff --git a/externals/figlet/getopt.c b/externals/figlet/getopt.c
--- a/externals/figlet/getopt.c
+++ b/externals/figlet/getopt.c
@@ -39,8 +39,8 @@
     extern int write(int, void *, unsigned);\
     char errbuf[2];\
     errbuf[0] = (char)c; errbuf[1] = '\n';\
-    (void) write(2, strlwr(argv[0]), (unsigned)strlen(argv[0]));\
-    (void) write(2, s, (unsigned)strlen(s));\
+    (void) write(2, strlwr(argv[0]), (unsigned)@strlen(argv[0]));\
+    (void) write(2, s, (unsigned)@strlen(s));\
     (void) write(2, errbuf, 2);}
 
 extern char    *index();
diff --git a/externals/mimemailparser/MimeMailParser.class.php b/externals/mimemailparser/MimeMailParser.class.php
--- a/externals/mimemailparser/MimeMailParser.class.php
+++ b/externals/mimemailparser/MimeMailParser.class.php
@@ -115,7 +115,7 @@
 	// end in a newline, Mailparse fails to include the last line in the mail
 	// body. This happens somewhere deep, deep inside the mailparse extension,
 	// so adding a newline here seems like the most straightforward fix.
-	if (!preg_match('/\n\z/', $data)) {
+	if (!@preg_match('/\n\z/', $data)) {
 	  $data = $data."\n";
 	}
 
@@ -274,7 +274,7 @@
 				$filename = $part['content-name'];
 				$disposition = 'attachment';
 			} elseif (!in_array($part['content-type'], $non_attachment_types, true)
-				&& substr($part['content-type'], 0, 10) !== 'multipart/'
+				&& @substr($part['content-type'], 0, 10) !== 'multipart/'
 				) {
 				// if we cannot get it with getMessageBody, we assume it is an attachment
 				$disposition = 'attachment';
@@ -412,7 +412,7 @@
 	private function getPartHeaderFromText(&$part) {
 		$start = $part['starting-pos'];
 		$end = $part['starting-pos-body'];
-		$header = substr($this->data, $start, $end-$start);
+		$header = @substr($this->data, $start, $end-$start);
 		return $header;
 	}
 	/**
@@ -423,7 +423,7 @@
 	private function getPartBodyFromText(&$part) {
 		$start = $part['starting-pos-body'];
 		$end = $part['ending-pos-body'];
-		$body = substr($this->data, $start, $end-$start);
+		$body = @substr($this->data, $start, $end-$start);
 		return $body;
 	}
 
@@ -456,7 +456,7 @@
 				}
 			} else if ($this->data) {
 				$attachment = $this->decode($this->getPartBodyFromText($part), $encoding);
-				fwrite($temp_fp, $attachment, strlen($attachment));
+				fwrite($temp_fp, $attachment, @strlen($attachment));
 			}
 			fseek($temp_fp, 0, SEEK_SET);
 		} else {
@@ -474,9 +474,9 @@
 	 * @param $encodingType		The encoding type from the Content-Transfer-Encoding header of the part.
 	 */
 	private function decode($encodedString, $encodingType) {
-		if (strtolower($encodingType) == 'base64') {
+		if (@strtolower($encodingType) == 'base64') {
 			return base64_decode($encodedString);
-		} else if (strtolower($encodingType) == 'quoted-printable') {
+		} else if (@strtolower($encodingType) == 'quoted-printable') {
 			 return quoted_printable_decode($encodedString);
 		} else {
 			return $encodedString;
diff --git a/externals/mimemailparser/attachment.class.php b/externals/mimemailparser/attachment.class.php
--- a/externals/mimemailparser/attachment.class.php
+++ b/externals/mimemailparser/attachment.class.php
@@ -79,11 +79,11 @@
 	 */
 	public function getFileExtension() {
 		if (!$this->extension) {
-			$ext = substr(strrchr($this->filename, '.'), 1);
+			$ext = @substr(strrchr($this->filename, '.'), 1);
 			if ($ext == 'gz') {
 				// special case, tar.gz
 				// todo: other special cases?
-				$ext = preg_match("/\.tar\.gz$/i", $ext) ? 'tar.gz' : 'gz';
+				$ext = @preg_match("/\.tar\.gz$/i", $ext) ? 'tar.gz' : 'gz';
 			}
 			$this->extension = $ext;
 		}
diff --git a/externals/pear-figlet/Text/Figlet.php b/externals/pear-figlet/Text/Figlet.php
--- a/externals/pear-figlet/Text/Figlet.php
+++ b/externals/pear-figlet/Text/Figlet.php
@@ -120,7 +120,7 @@
         $this->font_comment = '';
 
         // If Gzip compressed font
-        if (substr($filename, -3, 3) == '.gz') {
+        if (@substr($filename, -3, 3) == '.gz') {
             $filename   = 'compress.zlib://' . $filename;
             $compressed = true;
 
@@ -176,16 +176,16 @@
         //            Max_Length      Old_Layout
 
 
-        $header = explode(' ', fgets($fp, 2048));
+        $header = @explode(' ', fgets($fp, 2048));
 
-        if (substr($header[0], 0, 5) <> 'flf2a') {
+        if (@substr($header[0], 0, 5) <> 'flf2a') {
             return self::raiseError('Unknown FIGlet font format.', 4);
         }
 
         @list ($this->hardblank, $this->height,,,
         $this->oldlayout, $cmt_count, $this->rtol) = $header;
 
-        $this->hardblank = substr($this->hardblank, -1, 1);
+        $this->hardblank = @substr($this->hardblank, -1, 1);
 
         for ($i = 0; $i < $cmt_count; $i++) {
             $this->font_comment .= fgets($fp, 2048);
@@ -217,21 +217,21 @@
 
         // Extented characters
         for ($n = 0; !feof($fp); $n++) {
-            list ($i) = explode(' ', rtrim(fgets($fp, 1024)), 2);
+            list ($i) = @explode(' ', rtrim(fgets($fp, 1024)), 2);
             if ($i == '') {
                 continue;
             }
 
             // If comment
-            if (preg_match('/^\-0x/i', $i)) {
+            if (@preg_match('/^\-0x/i', $i)) {
                 $this->_skip($fp);
             } else {
                 // If Unicode
-                if (preg_match('/^0x/i', $i)) {
-                    $i = hexdec(substr($i, 2));
+                if (@preg_match('/^0x/i', $i)) {
+                    $i = hexdec(@substr($i, 2));
                 } else {
                     // If octal
-                    if ($i{0} === '0' && $i !== '0' || substr($i, 0, 2) == '-0') {
+                    if ($i{0} === '0' && $i !== '0' || @substr($i, 0, 2) == '-0') {
                         $i = octdec($i);
                     }
                 }
@@ -268,10 +268,10 @@
     {
         $out = array();
 
-        for ($i = 0; $i<strlen($str); $i++) {
+        for ($i = 0; $i<@strlen($str); $i++) {
             // Pseudo Unicode support
-            if (substr($str, $i, 2) == '%u') {
-                $lt = hexdec(substr($str, $i+2, 4));
+            if (@substr($str, $i, 2) == '%u') {
+                $lt = hexdec(@substr($str, $i+2, 4));
                 $i += 5;
             } else {
                 $lt = ord($str{$i});
@@ -312,11 +312,11 @@
                 $mindiff = -1;
 
                 for ($j = 0; $j < $this->height; $j++) {
-                    if (preg_match("/\S(\s*\\x00\s*)\S/", $out[$j], $r)) {
+                    if (@preg_match("/\S(\s*\\x00\s*)\S/", $out[$j], $r)) {
                         if ($mindiff == -1) {
-                            $mindiff = strlen($r[1]);
+                            $mindiff = @strlen($r[1]);
                         } else {
-                            $mindiff = min($mindiff, strlen($r[1]));
+                            $mindiff = min($mindiff, @strlen($r[1]));
                         }
                     }
                 }
@@ -326,8 +326,8 @@
 
                 if (--$mindiff > 0) {
                     for ($j = 0; $j < $this->height; $j++) {
-                        if (preg_match("/\\x00(\s{0,{$mindiff}})/", $out[$j], $r)) {
-                            $l       = strlen($r[1]);
+                        if (@preg_match("/\\x00(\s{0,{$mindiff}})/", $out[$j], $r)) {
+                            $l       = @strlen($r[1]);
                             $b       = $mindiff - $l;
                             $out[$j] = preg_replace("/\s{0,$b}\\x00\s{{$l}}/",
                                                     "\0",
@@ -395,8 +395,8 @@
         if ($this->oldlayout & 2) {
             $symb = '|/\\[]{}()<>';
 
-            if ($r[1] == '_' && strpos($symb, $r[2]) !== false ||
-                $r[2] == '_' && strpos($symb, $r[1]) !== false) {
+            if ($r[1] == '_' && @strpos($symb, $r[2]) !== false ||
+                $r[2] == '_' && @strpos($symb, $r[1]) !== false) {
                 $this->smush_flag = 1;
                 return $r[1];
             }
@@ -405,8 +405,8 @@
         if ($this->oldlayout & 4) {
             $classes = '|/\\[]{}()<>';
 
-            if (($left = strpos($classes, $r[1])) !== false) {
-                if (($right = strpos($classes, $r[2])) !== false) {
+            if (($left = @strpos($classes, $r[1])) !== false) {
+                if (($right = @strpos($classes, $r[2])) !== false) {
                     $this->smush_flag = 1;
                     return $right > $left ? $r[2] : $r[1];
                 }
@@ -462,7 +462,7 @@
             }
 
             $line = rtrim(fgets($fp, 2048), "\r\n");
-            if (preg_match('/(.){1,2}$/', $line, $r)) {
+            if (@preg_match('/(.){1,2}$/', $line, $r)) {
                 $line = str_replace($r[1], '', $line);
             }
 
diff --git a/externals/pear-figlet/docs/examples/hello_world.php b/externals/pear-figlet/docs/examples/hello_world.php
--- a/externals/pear-figlet/docs/examples/hello_world.php
+++ b/externals/pear-figlet/docs/examples/hello_world.php
@@ -11,7 +11,7 @@
         $str = iconv('utf-8', 'ucs-2be', $str);
         $out = '';
 
-        for ($i = 0, $len = strlen($str); $i<$len; $i++) {
+        for ($i = 0, $len = @strlen($str); $i<$len; $i++) {
             $code = ord($str[$i++]) * 256 + ord($str[$i]);
 
             $out .= $code < 128 ? $str[$i] : sprintf('%%u%04X', $code);
diff --git a/externals/phpmailer/class.phpmailer-lite.php b/externals/phpmailer/class.phpmailer-lite.php
--- a/externals/phpmailer/class.phpmailer-lite.php
+++ b/externals/phpmailer/class.phpmailer-lite.php
@@ -465,7 +465,7 @@
    * @access private
    */
   private function AddAnAddress($kind, $address, $name = '') {
-    if (!preg_match('/^(to|cc|bcc|ReplyTo)$/', $kind)) {
+    if (!@preg_match('/^(to|cc|bcc|ReplyTo)$/', $kind)) {
       echo 'Invalid recipient array: ' . $kind;
       return false;
     }
@@ -480,14 +480,14 @@
       return false;
     }
   if ($kind != 'ReplyTo') {
-    if (!isset($this->all_recipients[strtolower($address)])) {
+    if (!isset($this->all_recipients[@strtolower($address)])) {
       array_push($this->$kind, array($address, $name));
-      $this->all_recipients[strtolower($address)] = true;
+      $this->all_recipients[@strtolower($address)] = true;
       return true;
     }
   } else {
-    if (!array_key_exists(strtolower($address), $this->ReplyTo)) {
-      $this->ReplyTo[strtolower($address)] = array($address, $name);
+    if (!array_key_exists(@strtolower($address), $this->ReplyTo)) {
+      $this->ReplyTo[@strtolower($address)] = array($address, $name);
       return true;
     }
   }
@@ -543,7 +543,7 @@
         return true;
       }
     } else {
-      return preg_match('/^(?:[\w\!\#\$\%\&\'\*\+\-\/\=\?\^\`\{\|\}\~]+\.)*[\w\!\#\$\%\&\'\*\+\-\/\=\?\^\`\{\|\}\~]+@(?:(?:(?:[a-zA-Z0-9_](?:[a-zA-Z0-9_\-](?!\.)){0,61}[a-zA-Z0-9_-]?\.)+[a-zA-Z0-9_](?:[a-zA-Z0-9_\-](?!$)){0,61}[a-zA-Z0-9_]?)|(?:\[(?:(?:[01]?\d{1,2}|2[0-4]\d|25[0-5])\.){3}(?:[01]?\d{1,2}|2[0-4]\d|25[0-5])\]))$/', $address);
+      return @preg_match('/^(?:[\w\!\#\$\%\&\'\*\+\-\/\=\?\^\`\{\|\}\~]+\.)*[\w\!\#\$\%\&\'\*\+\-\/\=\?\^\`\{\|\}\~]+@(?:(?:(?:[a-zA-Z0-9_](?:[a-zA-Z0-9_\-](?!\.)){0,61}[a-zA-Z0-9_-]?\.)+[a-zA-Z0-9_](?:[a-zA-Z0-9_\-](?!$)){0,61}[a-zA-Z0-9_]?)|(?:\[(?:(?:[01]?\d{1,2}|2[0-4]\d|25[0-5])\.){3}(?:[01]?\d{1,2}|2[0-4]\d|25[0-5])\]))$/', $address);
     }
   }
 
@@ -618,7 +618,7 @@
    */
   protected function SendmailSend($header, $body) {
     if ($this->Sender != '') {
-      $sendmail = sprintf("%s -oi -f %s -t", escapeshellcmd($this->Sendmail), escapeshellarg($this->Sender));
+      $sendmail = sprintf("%s -oi -f %s -t", escapeshellcmd($this->Sendmail), @escapeshellarg($this->Sender));
     } else {
       $sendmail = sprintf("%s -oi -t", escapeshellcmd($this->Sendmail));
     }
@@ -654,7 +654,7 @@
     $to = implode(', ', $toArr);
 
     $params = sprintf("-oi -f %s", $this->Sender);
-    if ($this->Sender != '' && strlen(ini_get('safe_mode'))< 1) {
+    if ($this->Sender != '' && @strlen(ini_get('safe_mode'))< 1) {
       $old_from = ini_get('sendmail_from');
       ini_set('sendmail_from', $this->Sender);
       if ($this->SingleTo === true && count($toArr) > 1) {
@@ -786,34 +786,34 @@
     $soft_break = ($qp_mode) ? sprintf(" =%s", $this->LE) : $this->LE;
     // If utf-8 encoding is used, we will need to make sure we don't
     // split multibyte characters when we wrap
-    $is_utf8 = (strtolower($this->CharSet) == "utf-8");
+    $is_utf8 = (@strtolower($this->CharSet) == "utf-8");
 
     $message = $this->FixEOL($message);
-    if (substr($message, -1) == $this->LE) {
-      $message = substr($message, 0, -1);
+    if (@substr($message, -1) == $this->LE) {
+      $message = @substr($message, 0, -1);
     }
 
-    $line = explode($this->LE, $message);
+    $line = @explode($this->LE, $message);
     $message = '';
     for ($i=0 ;$i < count($line); $i++) {
-      $line_part = explode(' ', $line[$i]);
+      $line_part = @explode(' ', $line[$i]);
       $buf = '';
       for ($e = 0; $e<count($line_part); $e++) {
         $word = $line_part[$e];
-        if ($qp_mode and (strlen($word) > $length)) {
-          $space_left = $length - strlen($buf) - 1;
+        if ($qp_mode and (@strlen($word) > $length)) {
+          $space_left = $length - @strlen($buf) - 1;
           if ($e != 0) {
             if ($space_left > 20) {
               $len = $space_left;
               if ($is_utf8) {
                 $len = $this->UTF8CharBoundary($word, $len);
-              } elseif (substr($word, $len - 1, 1) == "=") {
+              } elseif (@substr($word, $len - 1, 1) == "=") {
                 $len--;
-              } elseif (substr($word, $len - 2, 1) == "=") {
+              } elseif (@substr($word, $len - 2, 1) == "=") {
                 $len -= 2;
               }
-              $part = substr($word, 0, $len);
-              $word = substr($word, $len);
+              $part = @substr($word, 0, $len);
+              $word = @substr($word, $len);
               $buf .= ' ' . $part;
               $message .= $buf . sprintf("=%s", $this->LE);
             } else {
@@ -821,19 +821,19 @@
             }
             $buf = '';
           }
-          while (strlen($word) > 0) {
+          while (@strlen($word) > 0) {
             $len = $length;
             if ($is_utf8) {
               $len = $this->UTF8CharBoundary($word, $len);
-            } elseif (substr($word, $len - 1, 1) == "=") {
+            } elseif (@substr($word, $len - 1, 1) == "=") {
               $len--;
-            } elseif (substr($word, $len - 2, 1) == "=") {
+            } elseif (@substr($word, $len - 2, 1) == "=") {
               $len -= 2;
             }
-            $part = substr($word, 0, $len);
-            $word = substr($word, $len);
+            $part = @substr($word, 0, $len);
+            $word = @substr($word, $len);
 
-            if (strlen($word) > 0) {
+            if (@strlen($word) > 0) {
               $message .= $part . sprintf("=%s", $this->LE);
             } else {
               $buf = $part;
@@ -843,7 +843,7 @@
           $buf_o = $buf;
           $buf .= ($e == 0) ? $word : (' ' . $word);
 
-          if (strlen($buf) > $length and $buf_o != '') {
+          if (@strlen($buf) > $length and $buf_o != '') {
             $message .= $buf_o . $soft_break;
             $buf = $word;
           }
@@ -868,12 +868,12 @@
     $foundSplitPos = false;
     $lookBack = 3;
     while (!$foundSplitPos) {
-      $lastChunk = substr($encodedText, $maxLength - $lookBack, $lookBack);
-      $encodedCharPos = strpos($lastChunk, "=");
+      $lastChunk = @substr($encodedText, $maxLength - $lookBack, $lookBack);
+      $encodedCharPos = @strpos($lastChunk, "=");
       if ($encodedCharPos !== false) {
         // Found start of encoded character byte within $lookBack block.
         // Check the encoded byte value (the 2 chars after the '=')
-        $hex = substr($encodedText, $maxLength - $lookBack + $encodedCharPos + 1, 2);
+        $hex = @substr($encodedText, $maxLength - $lookBack + $encodedCharPos + 1, 2);
         $dec = hexdec($hex);
         if ($dec < 128) { // Single byte character.
           // If the encoded char was found at pos 0, it will fit
@@ -1144,16 +1144,16 @@
    * @return void
    */
   private function SetMessageType() {
-    if(count($this->attachment) < 1 && strlen($this->AltBody) < 1) {
+    if(count($this->attachment) < 1 && @strlen($this->AltBody) < 1) {
       $this->message_type = 'plain';
     } else {
       if(count($this->attachment) > 0) {
         $this->message_type = 'attachments';
       }
-      if(strlen($this->AltBody) > 0 && count($this->attachment) < 1) {
+      if(@strlen($this->AltBody) > 0 && count($this->attachment) < 1) {
         $this->message_type = 'alt';
       }
-      if(strlen($this->AltBody) > 0 && count($this->attachment) > 0) {
+      if(@strlen($this->AltBody) > 0 && count($this->attachment) > 0) {
         $this->message_type = 'alt_attachments';
       }
     }
@@ -1340,7 +1340,7 @@
    */
   public function EncodeString ($str, $encoding = 'base64') {
     $encoded = '';
-    switch(strtolower($encoding)) {
+    switch(@strtolower($encoding)) {
       case 'base64':
         $encoded = chunk_split(base64_encode($str), 76, $this->LE);
         break;
@@ -1348,7 +1348,7 @@
       case '8bit':
         $encoded = $this->FixEOL($str);
         //Make sure it ends with a line break
-        if (substr($encoded, -(strlen($this->LE))) != $this->LE)
+        if (@substr($encoded, -(@strlen($this->LE))) != $this->LE)
           $encoded .= $this->LE;
         break;
       case 'binary':
@@ -1372,12 +1372,12 @@
   public function EncodeHeader($str, $position = 'text') {
     $x = 0;
 
-    switch (strtolower($position)) {
+    switch (@strtolower($position)) {
       case 'phrase':
-        if (!preg_match('/[\200-\377]/', $str)) {
+        if (!@preg_match('/[\200-\377]/', $str)) {
           // Can't use addslashes as we don't know what value has magic_quotes_sybase
           $encoded = addcslashes($str, "\0..\37\177\\\"");
-          if (($str == $encoded) && !preg_match('/[^A-Za-z0-9!#$%&\'*+\/=?^_`{|}~ -]/', $str)) {
+          if (($str == $encoded) && !@preg_match('/[^A-Za-z0-9!#$%&\'*+\/=?^_`{|}~ -]/', $str)) {
             return ($encoded);
           } else {
             return ("\"$encoded\"");
@@ -1398,9 +1398,9 @@
       return ($str);
     }
 
-    $maxlen = 75 - 7 - strlen($this->CharSet);
+    $maxlen = 75 - 7 - @strlen($this->CharSet);
     // Try to select the encoding which should produce the shortest output
-    if (strlen($str)/3 < $x) {
+    if (@strlen($str)/3 < $x) {
       $encoding = 'B';
       if (function_exists('mb_strlen') && $this->HasMultiBytes($str)) {
         // Use a custom function which correctly encodes and wraps long
@@ -1432,7 +1432,7 @@
    */
   public function HasMultiBytes($str) {
     if (function_exists('mb_strlen')) {
-      return (strlen($str) > mb_strlen($str, $this->CharSet));
+      return (@strlen($str) > mbstrlen($str, $this->CharSet));
     } else { // Assume no multibytes (we can't handle without mbstring functions anyway)
       return false;
     }
@@ -1451,11 +1451,11 @@
     $end = "?=";
     $encoded = "";
 
-    $mb_length = mb_strlen($str, $this->CharSet);
+    $mb_length = mbstrlen($str, $this->CharSet);
     // Each line must have length <= 75, including $start and $end
-    $length = 75 - strlen($start) - strlen($end);
+    $length = 75 - @strlen($start) - @strlen($end);
     // Average multi-byte ratio
-    $ratio = $mb_length / strlen($str);
+    $ratio = $mb_length / @strlen($str);
     // Base64 has a 4:3 ratio
     $offset = $avgLength = floor($length * $ratio * .75);
 
@@ -1468,13 +1468,13 @@
         $chunk = base64_encode($chunk);
         $lookBack++;
       }
-      while (strlen($chunk) > $length);
+      while (@strlen($chunk) > $length);
 
       $encoded .= $chunk . $this->LE;
     }
 
     // Chomp the last linefeed
-    $encoded = substr($encoded, 0, -strlen($this->LE));
+    $encoded = @substr($encoded, 0, -@strlen($this->LE));
     return $encoded;
   }
 
@@ -1493,10 +1493,10 @@
     $escape = '=';
     $output = '';
     while( list(, $line) = each($lines) ) {
-      $linlen = strlen($line);
+      $linlen = @strlen($line);
       $newline = '';
       for($i = 0; $i < $linlen; $i++) {
-        $c = substr( $line, $i, 1 );
+        $c = @substr( $line, $i, 1 );
         $dec = ord( $c );
         if ( ( $i == 0 ) && ( $dec == 46 ) ) { // convert first point in the line into =2E
           $c = '=2E';
@@ -1512,7 +1512,7 @@
           $h1 = floor($dec%16);
           $c = $escape.$hex[$h2].$hex[$h1];
         }
-        if ( (strlen($newline) + strlen($c)) >= $line_max ) { // CRLF is not counted
+        if ( (@strlen($newline) + @strlen($c)) >= $line_max ) { // CRLF is not counted
           $output .= $newline.$escape.$eol; //  soft line break; " =\r\n" is okay
           $newline = '';
           // check if newline first character will be point or not
@@ -1582,7 +1582,7 @@
     // There should not be any EOL in the string
     $encoded = preg_replace('/[\r\n]*/', '', $str);
 
-    switch (strtolower($position)) {
+    switch (@strtolower($position)) {
       case 'phrase':
         $encoded = preg_replace_callback(
           "/([^A-Za-z0-9!*+\/ -])/",
@@ -1699,7 +1699,7 @@
    */
   public function ClearAddresses() {
     foreach($this->to as $to) {
-      unset($this->all_recipients[strtolower($to[0])]);
+      unset($this->all_recipients[@strtolower($to[0])]);
     }
     $this->to = array();
   }
@@ -1710,7 +1710,7 @@
    */
   public function ClearCCs() {
     foreach($this->cc as $cc) {
-      unset($this->all_recipients[strtolower($cc[0])]);
+      unset($this->all_recipients[@strtolower($cc[0])]);
     }
     $this->cc = array();
   }
@@ -1721,7 +1721,7 @@
    */
   public function ClearBCCs() {
     foreach($this->bcc as $bcc) {
-      unset($this->all_recipients[strtolower($bcc[0])]);
+      unset($this->all_recipients[@strtolower($bcc[0])]);
     }
     $this->bcc = array();
   }
@@ -1854,7 +1854,7 @@
    * @return void
    */
   public function AddCustomHeader($custom_header) {
-    $this->CustomHeader[] = explode(':', $custom_header, 2);
+    $this->CustomHeader[] = @explode(':', $custom_header, 2);
   }
 
   /**
@@ -1867,15 +1867,15 @@
     if(isset($images[2])) {
       foreach($images[2] as $i => $url) {
         // do not change urls for absolute images (thanks to corvuscorax)
-        if (!preg_match('#^[A-z]+://#',$url)) {
+        if (!@preg_match('#^[A-z]+://#',$url)) {
           $filename = basename($url);
           $directory = dirname($url);
           ($directory == '.')?$directory='':'';
           $cid = 'cid:' . md5($filename);
           $ext = pathinfo($filename, PATHINFO_EXTENSION);
           $mimeType  = self::_mime_types($ext);
-          if ( strlen($basedir) > 1 && substr($basedir,-1) != '/') { $basedir .= '/'; }
-          if ( strlen($directory) > 1 && substr($directory,-1) != '/') { $directory .= '/'; }
+          if ( @strlen($basedir) > 1 && @substr($basedir,-1) != '/') { $basedir .= '/'; }
+          if ( @strlen($directory) > 1 && @substr($directory,-1) != '/') { $directory .= '/'; }
           if ( $this->AddEmbeddedImage($basedir.$directory.$filename, md5($filename), $filename, 'base64',$mimeType) ) {
             $message = preg_replace("/".$images[1][$i]."=\"".preg_quote($url, '/')."\"/Ui", $images[1][$i]."=\"".$cid."\"", $message);
           }
@@ -1990,7 +1990,7 @@
       'xl'    =>  'application/excel',
       'eml'   =>  'message/rfc822'
     );
-    return (!isset($mimes[strtolower($ext)])) ? 'application/octet-stream' : $mimes[strtolower($ext)];
+    return (!isset($mimes[@strtolower($ext)])) ? 'application/octet-stream' : $mimes[@strtolower($ext)];
   }
 
   /**
@@ -2056,7 +2056,7 @@
   public function DKIM_QP($txt) {
     $tmp="";
     $line="";
-    for ($i=0;$i<strlen($txt);$i++) {
+    for ($i=0;$i<@strlen($txt);$i++) {
       $ord=ord($txt[$i]);
       if ( ((0x21 <= $ord) && ($ord <= 0x3A)) || $ord == 0x3C || ((0x3E <= $ord) && ($ord <= 0x7E)) ) {
         $line.=$txt[$i];
@@ -2093,10 +2093,10 @@
    */
   public function DKIM_HeaderC($s) {
     $s=preg_replace("/\r\n\s+/"," ",$s);
-    $lines=explode("\r\n",$s);
+    $lines=@explode("\r\n",$s);
     foreach ($lines as $key=>$line) {
-      list($heading,$value)=explode(":",$line,2);
-      $heading=strtolower($heading);
+      list($heading,$value)=@explode(":",$line,2);
+      $heading=@strtolower($heading);
       $value=preg_replace("/\s+/"," ",$value) ; // Compress useless spaces
       $lines[$key]=$heading.":".trim($value) ; // Don't forget to remove WSP around the value
     }
@@ -2116,8 +2116,8 @@
     $body=str_replace("\r\n","\n",$body);
     $body=str_replace("\n","\r\n",$body);
     // END stabilize line endings
-    while (substr($body,strlen($body)-4,4) == "\r\n\r\n") {
-      $body=substr($body,0,strlen($body)-2);
+    while (@substr($body,@strlen($body)-4,4) == "\r\n\r\n") {
+      $body=@substr($body,0,@strlen($body)-2);
     }
     return $body;
   }
@@ -2136,11 +2136,11 @@
     $DKIMquery            = 'dns/txt'; // Query method
     $DKIMtime             = time() ; // Signature Timestamp = seconds since 00:00:00 - Jan 1, 1970 (UTC time zone)
     $subject_header       = "Subject: $subject";
-    $headers              = explode("\r\n",$headers_line);
+    $headers              = @explode("\r\n",$headers_line);
     foreach($headers as $header) {
-      if (strpos($header,'From:') === 0) {
+      if (@strpos($header,'From:') === 0) {
         $from_header=$header;
-      } elseif (strpos($header,'To:') === 0) {
+      } elseif (@strpos($header,'To:') === 0) {
         $to_header=$header;
       }
     }
@@ -2148,7 +2148,7 @@
     $to       = str_replace('|','=7C',$this->DKIM_QP($to_header));
     $subject  = str_replace('|','=7C',$this->DKIM_QP($subject_header)) ; // Copied header fields (dkim-quoted-printable
     $body     = $this->DKIM_BodyC($body);
-    $DKIMlen  = strlen($body) ; // Length of body
+    $DKIMlen  = @strlen($body) ; // Length of body
     $DKIMb64  = base64_encode(pack("H*", sha1($body))) ; // Base64 of packed binary SHA-1 hash of body
     $ident    = ($this->DKIM_identity == '')? '' : " i=" . $this->DKIM_identity . ";";
     $dkimhdrs = "DKIM-Signature: v=1; a=" . $DKIMsignatureType . "; q=" . $DKIMquery . "; l=" . $DKIMlen . "; s=" . $this->DKIM_selector . ";\r\n".
diff --git a/externals/phpmailer/class.phpmailer.php b/externals/phpmailer/class.phpmailer.php
--- a/externals/phpmailer/class.phpmailer.php
+++ b/externals/phpmailer/class.phpmailer.php
@@ -450,7 +450,7 @@
    * @access private
    */
   private function AddAnAddress($kind, $address, $name = '') {
-    if (!preg_match('/^(to|cc|bcc|ReplyTo)$/', $kind)) {
+    if (!@preg_match('/^(to|cc|bcc|ReplyTo)$/', $kind)) {
       echo 'Invalid recipient array: ' . kind;
       return false;
     }
@@ -465,14 +465,14 @@
       return false;
     }
     if ($kind != 'ReplyTo') {
-      if (!isset($this->all_recipients[strtolower($address)])) {
+      if (!isset($this->all_recipients[@strtolower($address)])) {
         array_push($this->$kind, array($address, $name));
-        $this->all_recipients[strtolower($address)] = true;
+        $this->all_recipients[@strtolower($address)] = true;
         return true;
       }
     } else {
-      if (!array_key_exists(strtolower($address), $this->ReplyTo)) {
-        $this->ReplyTo[strtolower($address)] = array($address, $name);
+      if (!array_key_exists(@strtolower($address), $this->ReplyTo)) {
+        $this->ReplyTo[@strtolower($address)] = array($address, $name);
       return true;
     }
   }
@@ -528,7 +528,7 @@
         return true;
       }
     } else {
-      return preg_match('/^(?:[\w\!\#\$\%\&\'\*\+\-\/\=\?\^\`\{\|\}\~]+\.)*[\w\!\#\$\%\&\'\*\+\-\/\=\?\^\`\{\|\}\~]+@(?:(?:(?:[a-zA-Z0-9_](?:[a-zA-Z0-9_\-](?!\.)){0,61}[a-zA-Z0-9_-]?\.)+[a-zA-Z0-9_](?:[a-zA-Z0-9_\-](?!$)){0,61}[a-zA-Z0-9_]?)|(?:\[(?:(?:[01]?\d{1,2}|2[0-4]\d|25[0-5])\.){3}(?:[01]?\d{1,2}|2[0-4]\d|25[0-5])\]))$/', $address);
+      return @preg_match('/^(?:[\w\!\#\$\%\&\'\*\+\-\/\=\?\^\`\{\|\}\~]+\.)*[\w\!\#\$\%\&\'\*\+\-\/\=\?\^\`\{\|\}\~]+@(?:(?:(?:[a-zA-Z0-9_](?:[a-zA-Z0-9_\-](?!\.)){0,61}[a-zA-Z0-9_-]?\.)+[a-zA-Z0-9_](?:[a-zA-Z0-9_\-](?!$)){0,61}[a-zA-Z0-9_]?)|(?:\[(?:(?:[01]?\d{1,2}|2[0-4]\d|25[0-5])\.){3}(?:[01]?\d{1,2}|2[0-4]\d|25[0-5])\]))$/', $address);
     }
   }
 
@@ -597,7 +597,7 @@
    */
   protected function SendmailSend($header, $body) {
     if ($this->Sender != '') {
-      $sendmail = sprintf("%s -oi -f %s -t", escapeshellcmd($this->Sendmail), escapeshellarg($this->Sender));
+      $sendmail = sprintf("%s -oi -f %s -t", escapeshellcmd($this->Sendmail), @escapeshellarg($this->Sender));
     } else {
       $sendmail = sprintf("%s -oi -t", escapeshellcmd($this->Sendmail));
     }
@@ -633,7 +633,7 @@
     $to = implode(', ', $toArr);
 
     $params = sprintf("-oi -f %s", $this->Sender);
-    if ($this->Sender != '' && strlen(ini_get('safe_mode'))< 1) {
+    if ($this->Sender != '' && @strlen(ini_get('safe_mode'))< 1) {
       $old_from = ini_get('sendmail_from');
       ini_set('sendmail_from', $this->Sender);
       if ($this->SingleTo === true && count($toArr) > 1) {
@@ -759,7 +759,7 @@
     }
 
     $this->smtp->do_debug = $this->SMTPDebug;
-    $hosts = explode(';', $this->Host);
+    $hosts = @explode(';', $this->Host);
     $index = 0;
     $connection = $this->smtp->Connected();
 
@@ -767,7 +767,7 @@
     try {
       while($index < count($hosts) && !$connection) {
         $hostinfo = array();
-        if (preg_match('/^(.+):([0-9]+)$/', $hosts[$index], $hostinfo)) {
+        if (@preg_match('/^(.+):([0-9]+)$/', $hosts[$index], $hostinfo)) {
           $host = $hostinfo[1];
           $port = $hostinfo[2];
         } else {
@@ -917,34 +917,34 @@
     $soft_break = ($qp_mode) ? sprintf(" =%s", $this->LE) : $this->LE;
     // If utf-8 encoding is used, we will need to make sure we don't
     // split multibyte characters when we wrap
-    $is_utf8 = (strtolower($this->CharSet) == "utf-8");
+    $is_utf8 = (@strtolower($this->CharSet) == "utf-8");
 
     $message = $this->FixEOL($message);
-    if (substr($message, -1) == $this->LE) {
-      $message = substr($message, 0, -1);
+    if (@substr($message, -1) == $this->LE) {
+      $message = @substr($message, 0, -1);
     }
 
-    $line = explode($this->LE, $message);
+    $line = @explode($this->LE, $message);
     $message = '';
     for ($i=0 ;$i < count($line); $i++) {
-      $line_part = explode(' ', $line[$i]);
+      $line_part = @explode(' ', $line[$i]);
       $buf = '';
       for ($e = 0; $e<count($line_part); $e++) {
         $word = $line_part[$e];
-        if ($qp_mode and (strlen($word) > $length)) {
-          $space_left = $length - strlen($buf) - 1;
+        if ($qp_mode and (@strlen($word) > $length)) {
+          $space_left = $length - @strlen($buf) - 1;
           if ($e != 0) {
             if ($space_left > 20) {
               $len = $space_left;
               if ($is_utf8) {
                 $len = $this->UTF8CharBoundary($word, $len);
-              } elseif (substr($word, $len - 1, 1) == "=") {
+              } elseif (@substr($word, $len - 1, 1) == "=") {
                 $len--;
-              } elseif (substr($word, $len - 2, 1) == "=") {
+              } elseif (@substr($word, $len - 2, 1) == "=") {
                 $len -= 2;
               }
-              $part = substr($word, 0, $len);
-              $word = substr($word, $len);
+              $part = @substr($word, 0, $len);
+              $word = @substr($word, $len);
               $buf .= ' ' . $part;
               $message .= $buf . sprintf("=%s", $this->LE);
             } else {
@@ -952,19 +952,19 @@
             }
             $buf = '';
           }
-          while (strlen($word) > 0) {
+          while (@strlen($word) > 0) {
             $len = $length;
             if ($is_utf8) {
               $len = $this->UTF8CharBoundary($word, $len);
-            } elseif (substr($word, $len - 1, 1) == "=") {
+            } elseif (@substr($word, $len - 1, 1) == "=") {
               $len--;
-            } elseif (substr($word, $len - 2, 1) == "=") {
+            } elseif (@substr($word, $len - 2, 1) == "=") {
               $len -= 2;
             }
-            $part = substr($word, 0, $len);
-            $word = substr($word, $len);
+            $part = @substr($word, 0, $len);
+            $word = @substr($word, $len);
 
-            if (strlen($word) > 0) {
+            if (@strlen($word) > 0) {
               $message .= $part . sprintf("=%s", $this->LE);
             } else {
               $buf = $part;
@@ -974,7 +974,7 @@
           $buf_o = $buf;
           $buf .= ($e == 0) ? $word : (' ' . $word);
 
-          if (strlen($buf) > $length and $buf_o != '') {
+          if (@strlen($buf) > $length and $buf_o != '') {
             $message .= $buf_o . $soft_break;
             $buf = $word;
           }
@@ -999,12 +999,12 @@
     $foundSplitPos = false;
     $lookBack = 3;
     while (!$foundSplitPos) {
-      $lastChunk = substr($encodedText, $maxLength - $lookBack, $lookBack);
-      $encodedCharPos = strpos($lastChunk, "=");
+      $lastChunk = @substr($encodedText, $maxLength - $lookBack, $lookBack);
+      $encodedCharPos = @strpos($lastChunk, "=");
       if ($encodedCharPos !== false) {
         // Found start of encoded character byte within $lookBack block.
         // Check the encoded byte value (the 2 chars after the '=')
-        $hex = substr($encodedText, $maxLength - $lookBack + $encodedCharPos + 1, 2);
+        $hex = @substr($encodedText, $maxLength - $lookBack + $encodedCharPos + 1, 2);
         $dec = hexdec($hex);
         if ($dec < 128) { // Single byte character.
           // If the encoded char was found at pos 0, it will fit
@@ -1276,16 +1276,16 @@
    * @return void
    */
   private function SetMessageType() {
-    if(count($this->attachment) < 1 && strlen($this->AltBody) < 1) {
+    if(count($this->attachment) < 1 && @strlen($this->AltBody) < 1) {
       $this->message_type = 'plain';
     } else {
       if(count($this->attachment) > 0) {
         $this->message_type = 'attachments';
       }
-      if(strlen($this->AltBody) > 0 && count($this->attachment) < 1) {
+      if(@strlen($this->AltBody) > 0 && count($this->attachment) < 1) {
         $this->message_type = 'alt';
       }
-      if(strlen($this->AltBody) > 0 && count($this->attachment) > 0) {
+      if(@strlen($this->AltBody) > 0 && count($this->attachment) > 0) {
         $this->message_type = 'alt_attachments';
       }
     }
@@ -1472,7 +1472,7 @@
    */
   public function EncodeString ($str, $encoding = 'base64') {
     $encoded = '';
-    switch(strtolower($encoding)) {
+    switch(@strtolower($encoding)) {
       case 'base64':
         $encoded = chunk_split(base64_encode($str), 76, $this->LE);
         break;
@@ -1480,7 +1480,7 @@
       case '8bit':
         $encoded = $this->FixEOL($str);
         //Make sure it ends with a line break
-        if (substr($encoded, -(strlen($this->LE))) != $this->LE)
+        if (@substr($encoded, -(@strlen($this->LE))) != $this->LE)
           $encoded .= $this->LE;
         break;
       case 'binary':
@@ -1504,12 +1504,12 @@
   public function EncodeHeader($str, $position = 'text') {
     $x = 0;
 
-    switch (strtolower($position)) {
+    switch (@strtolower($position)) {
       case 'phrase':
-        if (!preg_match('/[\200-\377]/', $str)) {
+        if (!@preg_match('/[\200-\377]/', $str)) {
           // Can't use addslashes as we don't know what value has magic_quotes_sybase
           $encoded = addcslashes($str, "\0..\37\177\\\"");
-          if (($str == $encoded) && !preg_match('/[^A-Za-z0-9!#$%&\'*+\/=?^_`{|}~ -]/', $str)) {
+          if (($str == $encoded) && !@preg_match('/[^A-Za-z0-9!#$%&\'*+\/=?^_`{|}~ -]/', $str)) {
             return ($encoded);
           } else {
             return ("\"$encoded\"");
@@ -1530,9 +1530,9 @@
       return ($str);
     }
 
-    $maxlen = 75 - 7 - strlen($this->CharSet);
+    $maxlen = 75 - 7 - @strlen($this->CharSet);
     // Try to select the encoding which should produce the shortest output
-    if (strlen($str)/3 < $x) {
+    if (@strlen($str)/3 < $x) {
       $encoding = 'B';
       if (function_exists('mb_strlen') && $this->HasMultiBytes($str)) {
         // Use a custom function which correctly encodes and wraps long
@@ -1564,7 +1564,7 @@
    */
   public function HasMultiBytes($str) {
     if (function_exists('mb_strlen')) {
-      return (strlen($str) > mb_strlen($str, $this->CharSet));
+      return (@strlen($str) > mbstrlen($str, $this->CharSet));
     } else { // Assume no multibytes (we can't handle without mbstring functions anyway)
       return false;
     }
@@ -1583,11 +1583,11 @@
     $end = "?=";
     $encoded = "";
 
-    $mb_length = mb_strlen($str, $this->CharSet);
+    $mb_length = mbstrlen($str, $this->CharSet);
     // Each line must have length <= 75, including $start and $end
-    $length = 75 - strlen($start) - strlen($end);
+    $length = 75 - @strlen($start) - @strlen($end);
     // Average multi-byte ratio
-    $ratio = $mb_length / strlen($str);
+    $ratio = $mb_length / @strlen($str);
     // Base64 has a 4:3 ratio
     $offset = $avgLength = floor($length * $ratio * .75);
 
@@ -1600,13 +1600,13 @@
         $chunk = base64_encode($chunk);
         $lookBack++;
       }
-      while (strlen($chunk) > $length);
+      while (@strlen($chunk) > $length);
 
       $encoded .= $chunk . $this->LE;
     }
 
     // Chomp the last linefeed
-    $encoded = substr($encoded, 0, -strlen($this->LE));
+    $encoded = @substr($encoded, 0, -@strlen($this->LE));
     return $encoded;
   }
 
@@ -1625,10 +1625,10 @@
     $escape = '=';
     $output = '';
     while( list(, $line) = each($lines) ) {
-      $linlen = strlen($line);
+      $linlen = @strlen($line);
       $newline = '';
       for($i = 0; $i < $linlen; $i++) {
-        $c = substr( $line, $i, 1 );
+        $c = @substr( $line, $i, 1 );
         $dec = ord( $c );
         if ( ( $i == 0 ) && ( $dec == 46 ) ) { // convert first point in the line into =2E
           $c = '=2E';
@@ -1644,7 +1644,7 @@
           $h1 = floor($dec%16);
           $c = $escape.$hex[$h2].$hex[$h1];
         }
-        if ( (strlen($newline) + strlen($c)) >= $line_max ) { // CRLF is not counted
+        if ( (@strlen($newline) + @strlen($c)) >= $line_max ) { // CRLF is not counted
           $output .= $newline.$escape.$eol; //  soft line break; " =\r\n" is okay
           $newline = '';
           // check if newline first character will be point or not
@@ -1714,7 +1714,7 @@
     // There should not be any EOL in the string
     $encoded = preg_replace('/[\r\n]*/', '', $str);
 
-    switch (strtolower($position)) {
+    switch (@strtolower($position)) {
       case 'phrase':
         $encoded = preg_replace_callback(
           "/([^A-Za-z0-9!*+\/ -])/",
@@ -1831,7 +1831,7 @@
    */
   public function ClearAddresses() {
     foreach($this->to as $to) {
-      unset($this->all_recipients[strtolower($to[0])]);
+      unset($this->all_recipients[@strtolower($to[0])]);
     }
     $this->to = array();
   }
@@ -1842,7 +1842,7 @@
    */
   public function ClearCCs() {
     foreach($this->cc as $cc) {
-      unset($this->all_recipients[strtolower($cc[0])]);
+      unset($this->all_recipients[@strtolower($cc[0])]);
     }
     $this->cc = array();
   }
@@ -1853,7 +1853,7 @@
    */
   public function ClearBCCs() {
     foreach($this->bcc as $bcc) {
-      unset($this->all_recipients[strtolower($bcc[0])]);
+      unset($this->all_recipients[@strtolower($bcc[0])]);
     }
     $this->bcc = array();
   }
@@ -1992,7 +1992,7 @@
    * @return void
    */
   public function AddCustomHeader($custom_header) {
-    $this->CustomHeader[] = explode(':', $custom_header, 2);
+    $this->CustomHeader[] = @explode(':', $custom_header, 2);
   }
 
   /**
@@ -2005,15 +2005,15 @@
     if(isset($images[2])) {
       foreach($images[2] as $i => $url) {
         // do not change urls for absolute images (thanks to corvuscorax)
-        if (!preg_match('#^[A-z]+://#',$url)) {
+        if (!@preg_match('#^[A-z]+://#',$url)) {
           $filename = basename($url);
           $directory = dirname($url);
           ($directory == '.')?$directory='':'';
           $cid = 'cid:' . md5($filename);
           $ext = pathinfo($filename, PATHINFO_EXTENSION);
           $mimeType  = self::_mime_types($ext);
-          if ( strlen($basedir) > 1 && substr($basedir,-1) != '/') { $basedir .= '/'; }
-          if ( strlen($directory) > 1 && substr($directory,-1) != '/') { $directory .= '/'; }
+          if ( @strlen($basedir) > 1 && @substr($basedir,-1) != '/') { $basedir .= '/'; }
+          if ( @strlen($directory) > 1 && @substr($directory,-1) != '/') { $directory .= '/'; }
           if ( $this->AddEmbeddedImage($basedir.$directory.$filename, md5($filename), $filename, 'base64',$mimeType) ) {
             $message = preg_replace("/".$images[1][$i]."=\"".preg_quote($url, '/')."\"/Ui", $images[1][$i]."=\"".$cid."\"", $message);
           }
@@ -2128,7 +2128,7 @@
       'xl'    =>  'application/excel',
       'eml'   =>  'message/rfc822'
     );
-    return (!isset($mimes[strtolower($ext)])) ? 'application/octet-stream' : $mimes[strtolower($ext)];
+    return (!isset($mimes[@strtolower($ext)])) ? 'application/octet-stream' : $mimes[@strtolower($ext)];
   }
 
   /**
@@ -2194,7 +2194,7 @@
   public function DKIM_QP($txt) {
     $tmp="";
     $line="";
-    for ($i=0;$i<strlen($txt);$i++) {
+    for ($i=0;$i<@strlen($txt);$i++) {
       $ord=ord($txt[$i]);
       if ( ((0x21 <= $ord) && ($ord <= 0x3A)) || $ord == 0x3C || ((0x3E <= $ord) && ($ord <= 0x7E)) ) {
         $line.=$txt[$i];
@@ -2231,10 +2231,10 @@
    */
   public function DKIM_HeaderC($s) {
     $s=preg_replace("/\r\n\s+/"," ",$s);
-    $lines=explode("\r\n",$s);
+    $lines=@explode("\r\n",$s);
     foreach ($lines as $key=>$line) {
-      list($heading,$value)=explode(":",$line,2);
-      $heading=strtolower($heading);
+      list($heading,$value)=@explode(":",$line,2);
+      $heading=@strtolower($heading);
       $value=preg_replace("/\s+/"," ",$value) ; // Compress useless spaces
       $lines[$key]=$heading.":".trim($value) ; // Don't forget to remove WSP around the value
     }
@@ -2254,8 +2254,8 @@
     $body=str_replace("\r\n","\n",$body);
     $body=str_replace("\n","\r\n",$body);
     // END stabilize line endings
-    while (substr($body,strlen($body)-4,4) == "\r\n\r\n") {
-      $body=substr($body,0,strlen($body)-2);
+    while (@substr($body,@strlen($body)-4,4) == "\r\n\r\n") {
+      $body=@substr($body,0,@strlen($body)-2);
     }
     return $body;
   }
@@ -2274,11 +2274,11 @@
     $DKIMquery            = 'dns/txt'; // Query method
     $DKIMtime             = time() ; // Signature Timestamp = seconds since 00:00:00 - Jan 1, 1970 (UTC time zone)
     $subject_header       = "Subject: $subject";
-    $headers              = explode("\r\n",$headers_line);
+    $headers              = @explode("\r\n",$headers_line);
     foreach($headers as $header) {
-      if (strpos($header,'From:') === 0) {
+      if (@strpos($header,'From:') === 0) {
         $from_header=$header;
-      } elseif (strpos($header,'To:') === 0) {
+      } elseif (@strpos($header,'To:') === 0) {
         $to_header=$header;
       }
     }
@@ -2286,7 +2286,7 @@
     $to       = str_replace('|','=7C',$this->DKIM_QP($to_header));
     $subject  = str_replace('|','=7C',$this->DKIM_QP($subject_header)) ; // Copied header fields (dkim-quoted-printable
     $body     = $this->DKIM_BodyC($body);
-    $DKIMlen  = strlen($body) ; // Length of body
+    $DKIMlen  = @strlen($body) ; // Length of body
     $DKIMb64  = base64_encode(pack("H*", sha1($body))) ; // Base64 of packed binary SHA-1 hash of body
     $ident    = ($this->DKIM_identity == '')? '' : " i=" . $this->DKIM_identity . ";";
     $dkimhdrs = "DKIM-Signature: v=1; a=" . $DKIMsignatureType . "; q=" . $DKIMquery . "; l=" . $DKIMlen . "; s=" . $this->DKIM_selector . ";\r\n".
diff --git a/externals/phpmailer/class.pop3.php b/externals/phpmailer/class.pop3.php
--- a/externals/phpmailer/class.pop3.php
+++ b/externals/phpmailer/class.pop3.php
@@ -245,7 +245,7 @@
       stream_set_timeout($this->pop_conn, $tval, 0);
     } else {
       //  Does not work on Windows
-      if (substr(PHP_OS, 0, 3) !== 'WIN') {
+      if (@substr(PHP_OS, 0, 3) !== 'WIN') {
         socket_set_timeout($this->pop_conn, $tval, 0);
       }
     }
@@ -342,7 +342,7 @@
    * @return integer
    */
   private function sendString ($string) {
-    $bytes_sent = fwrite($this->pop_conn, $string, strlen($string));
+    $bytes_sent = fwrite($this->pop_conn, $string, @strlen($string));
 
     return $bytes_sent;
   }
@@ -354,7 +354,7 @@
    * @return boolean
    */
   private function checkResponse ($string) {
-    if (substr($string, 0, 3) !== '+OK') {
+    if (@substr($string, 0, 3) !== '+OK') {
       $this->error = array(
         'error' => "Server reported an error: $string",
         'errno' => 0,
diff --git a/externals/phpmailer/class.smtp.php b/externals/phpmailer/class.smtp.php
--- a/externals/phpmailer/class.smtp.php
+++ b/externals/phpmailer/class.smtp.php
@@ -143,7 +143,7 @@
 
     // SMTP server can take longer to respond, give longer timeout for first read
     // Windows does not have support for this timeout function
-    if(substr(PHP_OS, 0, 3) != "WIN")
+    if(@substr(PHP_OS, 0, 3) != "WIN")
      socket_set_timeout($this->smtp_conn, $tval, 0);
 
     // get any announcement
@@ -176,7 +176,7 @@
     fputs($this->smtp_conn,"STARTTLS" . $this->CRLF);
 
     $rply = $this->get_lines();
-    $code = substr($rply,0,3);
+    $code = @substr($rply,0,3);
 
     if($this->do_debug >= 2) {
       echo "SMTP -> FROM SERVER:" . $rply . $this->CRLF . '<br />';
@@ -186,7 +186,7 @@
       $this->error =
          array("error"     => "STARTTLS not accepted from server",
                "smtp_code" => $code,
-               "smtp_msg"  => substr($rply,4));
+               "smtp_msg"  => @substr($rply,4));
       if($this->do_debug >= 1) {
         echo "SMTP -> ERROR: " . $this->error["error"] . ": " . $rply . $this->CRLF . '<br />';
       }
@@ -212,13 +212,13 @@
     fputs($this->smtp_conn,"AUTH LOGIN" . $this->CRLF);
 
     $rply = $this->get_lines();
-    $code = substr($rply,0,3);
+    $code = @substr($rply,0,3);
 
     if($code != 334) {
       $this->error =
         array("error" => "AUTH not accepted from server",
               "smtp_code" => $code,
-              "smtp_msg" => substr($rply,4));
+              "smtp_msg" => @substr($rply,4));
       if($this->do_debug >= 1) {
         echo "SMTP -> ERROR: " . $this->error["error"] . ": " . $rply . $this->CRLF . '<br />';
       }
@@ -229,13 +229,13 @@
     fputs($this->smtp_conn, base64_encode($username) . $this->CRLF);
 
     $rply = $this->get_lines();
-    $code = substr($rply,0,3);
+    $code = @substr($rply,0,3);
 
     if($code != 334) {
       $this->error =
         array("error" => "Username not accepted from server",
               "smtp_code" => $code,
-              "smtp_msg" => substr($rply,4));
+              "smtp_msg" => @substr($rply,4));
       if($this->do_debug >= 1) {
         echo "SMTP -> ERROR: " . $this->error["error"] . ": " . $rply . $this->CRLF . '<br />';
       }
@@ -246,13 +246,13 @@
     fputs($this->smtp_conn, base64_encode($password) . $this->CRLF);
 
     $rply = $this->get_lines();
-    $code = substr($rply,0,3);
+    $code = @substr($rply,0,3);
 
     if($code != 235) {
       $this->error =
         array("error" => "Password not accepted from server",
               "smtp_code" => $code,
-              "smtp_msg" => substr($rply,4));
+              "smtp_msg" => @substr($rply,4));
       if($this->do_debug >= 1) {
         echo "SMTP -> ERROR: " . $this->error["error"] . ": " . $rply . $this->CRLF . '<br />';
       }
@@ -335,7 +335,7 @@
     fputs($this->smtp_conn,"DATA" . $this->CRLF);
 
     $rply = $this->get_lines();
-    $code = substr($rply,0,3);
+    $code = @substr($rply,0,3);
 
     if($this->do_debug >= 2) {
       echo "SMTP -> FROM SERVER:" . $rply . $this->CRLF . '<br />';
@@ -345,7 +345,7 @@
       $this->error =
         array("error" => "DATA command not accepted from server",
               "smtp_code" => $code,
-              "smtp_msg" => substr($rply,4));
+              "smtp_msg" => @substr($rply,4));
       if($this->do_debug >= 1) {
         echo "SMTP -> ERROR: " . $this->error["error"] . ": " . $rply . $this->CRLF . '<br />';
       }
@@ -366,7 +366,7 @@
     // normalize the line breaks so we know the explode works
     $msg_data = str_replace("\r\n","\n",$msg_data);
     $msg_data = str_replace("\r","\n",$msg_data);
-    $lines = explode("\n",$msg_data);
+    $lines = @explode("\n",$msg_data);
 
     /* we need to find a good way to determine is headers are
      * in the msg_data or if it is a straight msg body
@@ -377,7 +377,7 @@
      * headers.
      */
 
-    $field = substr($lines[0],0,strpos($lines[0],":"));
+    $field = @substr($lines[0],0,@strpos($lines[0],":"));
     $in_headers = false;
     if(!empty($field) && !strstr($field," ")) {
       $in_headers = true;
@@ -391,17 +391,17 @@
         $in_headers = false;
       }
       // ok we need to break this line up into several smaller lines
-      while(strlen($line) > $max_line_length) {
-        $pos = strrpos(substr($line,0,$max_line_length)," ");
+      while(@strlen($line) > $max_line_length) {
+        $pos = strrpos(@substr($line,0,$max_line_length)," ");
 
         // Patch to fix DOS attack
         if(!$pos) {
           $pos = $max_line_length - 1;
-          $lines_out[] = substr($line,0,$pos);
-          $line = substr($line,$pos);
+          $lines_out[] = @substr($line,0,$pos);
+          $line = @substr($line,$pos);
         } else {
-          $lines_out[] = substr($line,0,$pos);
-          $line = substr($line,$pos + 1);
+          $lines_out[] = @substr($line,0,$pos);
+          $line = @substr($line,$pos + 1);
         }
 
         /* if processing headers add a LWSP-char to the front of new line
@@ -415,9 +415,9 @@
 
       // send the lines to the server
       while(list(,$line_out) = @each($lines_out)) {
-        if(strlen($line_out) > 0)
+        if(@strlen($line_out) > 0)
         {
-          if(substr($line_out, 0, 1) == ".") {
+          if(@substr($line_out, 0, 1) == ".") {
             $line_out = "." . $line_out;
           }
         }
@@ -429,7 +429,7 @@
     fputs($this->smtp_conn, $this->CRLF . "." . $this->CRLF);
 
     $rply = $this->get_lines();
-    $code = substr($rply,0,3);
+    $code = @substr($rply,0,3);
 
     if($this->do_debug >= 2) {
       echo "SMTP -> FROM SERVER:" . $rply . $this->CRLF . '<br />';
@@ -439,7 +439,7 @@
       $this->error =
         array("error" => "DATA not accepted from server",
               "smtp_code" => $code,
-              "smtp_msg" => substr($rply,4));
+              "smtp_msg" => @substr($rply,4));
       if($this->do_debug >= 1) {
         echo "SMTP -> ERROR: " . $this->error["error"] . ": " . $rply . $this->CRLF . '<br />';
       }
@@ -494,7 +494,7 @@
     fputs($this->smtp_conn, $hello . " " . $host . $this->CRLF);
 
     $rply = $this->get_lines();
-    $code = substr($rply,0,3);
+    $code = @substr($rply,0,3);
 
     if($this->do_debug >= 2) {
       echo "SMTP -> FROM SERVER: " . $rply . $this->CRLF . '<br />';
@@ -504,7 +504,7 @@
       $this->error =
         array("error" => $hello . " not accepted from server",
               "smtp_code" => $code,
-              "smtp_msg" => substr($rply,4));
+              "smtp_msg" => @substr($rply,4));
       if($this->do_debug >= 1) {
         echo "SMTP -> ERROR: " . $this->error["error"] . ": " . $rply . $this->CRLF . '<br />';
       }
@@ -543,7 +543,7 @@
     fputs($this->smtp_conn,"MAIL FROM:<" . $from . ">" . $useVerp . $this->CRLF);
 
     $rply = $this->get_lines();
-    $code = substr($rply,0,3);
+    $code = @substr($rply,0,3);
 
     if($this->do_debug >= 2) {
       echo "SMTP -> FROM SERVER:" . $rply . $this->CRLF . '<br />';
@@ -553,7 +553,7 @@
       $this->error =
         array("error" => "MAIL not accepted from server",
               "smtp_code" => $code,
-              "smtp_msg" => substr($rply,4));
+              "smtp_msg" => @substr($rply,4));
       if($this->do_debug >= 1) {
         echo "SMTP -> ERROR: " . $this->error["error"] . ": " . $rply . $this->CRLF . '<br />';
       }
@@ -595,12 +595,12 @@
     $rval = true;
     $e = null;
 
-    $code = substr($byemsg,0,3);
+    $code = @substr($byemsg,0,3);
     if($code != 221) {
       // use e as a tmp var cause Close will overwrite $this->error
       $e = array("error" => "SMTP server rejected quit command",
                  "smtp_code" => $code,
-                 "smtp_rply" => substr($byemsg,4));
+                 "smtp_rply" => @substr($byemsg,4));
       $rval = false;
       if($this->do_debug >= 1) {
         echo "SMTP -> ERROR: " . $e["error"] . ": " . $byemsg . $this->CRLF . '<br />';
@@ -638,7 +638,7 @@
     fputs($this->smtp_conn,"RCPT TO:<" . $to . ">" . $this->CRLF);
 
     $rply = $this->get_lines();
-    $code = substr($rply,0,3);
+    $code = @substr($rply,0,3);
 
     if($this->do_debug >= 2) {
       echo "SMTP -> FROM SERVER:" . $rply . $this->CRLF . '<br />';
@@ -648,7 +648,7 @@
       $this->error =
         array("error" => "RCPT not accepted from server",
               "smtp_code" => $code,
-              "smtp_msg" => substr($rply,4));
+              "smtp_msg" => @substr($rply,4));
       if($this->do_debug >= 1) {
         echo "SMTP -> ERROR: " . $this->error["error"] . ": " . $rply . $this->CRLF . '<br />';
       }
@@ -681,7 +681,7 @@
     fputs($this->smtp_conn,"RSET" . $this->CRLF);
 
     $rply = $this->get_lines();
-    $code = substr($rply,0,3);
+    $code = @substr($rply,0,3);
 
     if($this->do_debug >= 2) {
       echo "SMTP -> FROM SERVER:" . $rply . $this->CRLF . '<br />';
@@ -691,7 +691,7 @@
       $this->error =
         array("error" => "RSET failed",
               "smtp_code" => $code,
-              "smtp_msg" => substr($rply,4));
+              "smtp_msg" => @substr($rply,4));
       if($this->do_debug >= 1) {
         echo "SMTP -> ERROR: " . $this->error["error"] . ": " . $rply . $this->CRLF . '<br />';
       }
@@ -729,7 +729,7 @@
     fputs($this->smtp_conn,"SAML FROM:" . $from . $this->CRLF);
 
     $rply = $this->get_lines();
-    $code = substr($rply,0,3);
+    $code = @substr($rply,0,3);
 
     if($this->do_debug >= 2) {
       echo "SMTP -> FROM SERVER:" . $rply . $this->CRLF . '<br />';
@@ -739,7 +739,7 @@
       $this->error =
         array("error" => "SAML not accepted from server",
               "smtp_code" => $code,
-              "smtp_msg" => substr($rply,4));
+              "smtp_msg" => @substr($rply,4));
       if($this->do_debug >= 1) {
         echo "SMTP -> ERROR: " . $this->error["error"] . ": " . $rply . $this->CRLF . '<br />';
       }
@@ -804,7 +804,7 @@
         echo "SMTP -> get_lines(): \$data is \"$data\"" . $this->CRLF . '<br />';
       }
       // if 4th character is a space, we are done reading, break the loop
-      if(substr($str,3,1) == " ") { break; }
+      if(@substr($str,3,1) == " ") { break; }
     }
     return $data;
   }
diff --git a/externals/phpqrcode/phpqrcode.php b/externals/phpqrcode/phpqrcode.php
--- a/externals/phpqrcode/phpqrcode.php
+++ b/externals/phpqrcode/phpqrcode.php
@@ -97,7 +97,7 @@
 	
 	class qrstr {
 		public static function set(&$srctab, $x, $y, $repl, $replLen = false) {
-			$srctab[$y] = substr_replace($srctab[$y], ($replLen !== false)?substr($repl,0,$replLen):$repl, $x, ($replLen !== false)?$replLen:strlen($repl));
+			$srctab[$y] = substr_replace($srctab[$y], ($replLen !== false)?@substr($repl,0,$replLen):$repl, $x, ($replLen !== false)?$replLen:@strlen($repl));
 		}
 	}	
 
@@ -177,7 +177,7 @@
             $barcode_array = array();
             
             if (!is_array($mode))
-                $mode = explode(',', $mode);
+                $mode = @explode(',', $mode);
                 
             $eccLevel = 'L';
                 
@@ -258,7 +258,7 @@
         //----------------------------------------------------------------------
         public static function markTime($markerId)
         {
-            list($usec, $sec) = explode(" ", microtime());
+            list($usec, $sec) = @explode(" ", microtime());
             $time = ((float)$usec + (float)$sec);
             
             if (!isset($GLOBALS['qr_time_bench']))
@@ -802,8 +802,8 @@
             if ($binary_mode) {
             
                     foreach ($frame as &$frameLine) {
-                        $frameLine = join('<span class="m">&nbsp;&nbsp;</span>', explode('0', $frameLine));
-                        $frameLine = join('&#9608;&#9608;', explode('1', $frameLine));
+                        $frameLine = join('<span class="m">&nbsp;&nbsp;</span>', @explode('0', $frameLine));
+                        $frameLine = join('&#9608;&#9608;', @explode('1', $frameLine));
                     }
                     
                     ?>
@@ -818,19 +818,19 @@
             } else {
             
                 foreach ($frame as &$frameLine) {
-                    $frameLine = join('<span class="m">&nbsp;</span>',  explode("\xc0", $frameLine));
-                    $frameLine = join('<span class="m">&#9618;</span>', explode("\xc1", $frameLine));
-                    $frameLine = join('<span class="p">&nbsp;</span>',  explode("\xa0", $frameLine));
-                    $frameLine = join('<span class="p">&#9618;</span>', explode("\xa1", $frameLine));
-                    $frameLine = join('<span class="s">&#9671;</span>', explode("\x84", $frameLine)); //format 0
-                    $frameLine = join('<span class="s">&#9670;</span>', explode("\x85", $frameLine)); //format 1
-                    $frameLine = join('<span class="x">&#9762;</span>', explode("\x81", $frameLine)); //special bit
-                    $frameLine = join('<span class="c">&nbsp;</span>',  explode("\x90", $frameLine)); //clock 0
-                    $frameLine = join('<span class="c">&#9719;</span>', explode("\x91", $frameLine)); //clock 1
-                    $frameLine = join('<span class="f">&nbsp;</span>',  explode("\x88", $frameLine)); //version
-                    $frameLine = join('<span class="f">&#9618;</span>', explode("\x89", $frameLine)); //version
-                    $frameLine = join('&#9830;', explode("\x01", $frameLine));
-                    $frameLine = join('&#8901;', explode("\0", $frameLine));
+                    $frameLine = join('<span class="m">&nbsp;</span>',  @explode("\xc0", $frameLine));
+                    $frameLine = join('<span class="m">&#9618;</span>', @explode("\xc1", $frameLine));
+                    $frameLine = join('<span class="p">&nbsp;</span>',  @explode("\xa0", $frameLine));
+                    $frameLine = join('<span class="p">&#9618;</span>', @explode("\xa1", $frameLine));
+                    $frameLine = join('<span class="s">&#9671;</span>', @explode("\x84", $frameLine)); //format 0
+                    $frameLine = join('<span class="s">&#9670;</span>', @explode("\x85", $frameLine)); //format 1
+                    $frameLine = join('<span class="x">&#9762;</span>', @explode("\x81", $frameLine)); //special bit
+                    $frameLine = join('<span class="c">&nbsp;</span>',  @explode("\x90", $frameLine)); //clock 0
+                    $frameLine = join('<span class="c">&#9719;</span>', @explode("\x91", $frameLine)); //clock 1
+                    $frameLine = join('<span class="f">&nbsp;</span>',  @explode("\x88", $frameLine)); //version
+                    $frameLine = join('<span class="f">&#9618;</span>', @explode("\x89", $frameLine)); //version
+                    $frameLine = join('&#9830;', @explode("\x01", $frameLine));
+                    $frameLine = join('&#8901;', @explode("\0", $frameLine));
                 }
                 
                 ?>
@@ -859,7 +859,7 @@
         //----------------------------------------------------------------------
         public static function unserial($code)
         {
-            return explode("\n", gzuncompress($code));
+            return @explode("\n", gzuncompress($code));
         }
         
         //----------------------------------------------------------------------
@@ -977,7 +977,7 @@
         private static function image($frame, $pixelPerPoint = 4, $outerFrame = 4) 
         {
             $h = count($frame);
-            $w = strlen($frame[0]);
+            $w = @strlen($frame[0]);
             
             $imgW = $w + 2*$outerFrame;
             $imgH = $h + 2*$outerFrame;
@@ -1984,7 +1984,7 @@
         //----------------------------------------------------------------------
         public static function isdigitat($str, $pos)
         {    
-            if ($pos >= strlen($str))
+            if ($pos >= @strlen($str))
                 return false;
             
             return ((ord($str[$pos]) >= ord('0'))&&(ord($str[$pos]) <= ord('9')));
@@ -1993,7 +1993,7 @@
         //----------------------------------------------------------------------
         public static function isalnumat($str, $pos)
         {
-            if ($pos >= strlen($str))
+            if ($pos >= @strlen($str))
                 return false;
                 
             return (QRinput::lookAnTable(ord($str[$pos])) >= 0);
@@ -2002,7 +2002,7 @@
         //----------------------------------------------------------------------
         public function identifyMode($pos)
         {
-            if ($pos >= strlen($this->dataStr)) 
+            if ($pos >= @strlen($this->dataStr)) 
                 return QR_MODE_NUL;
                 
             $c = $this->dataStr[$pos];
@@ -2013,7 +2013,7 @@
                 return QR_MODE_AN;
             } else if($this->modeHint == QR_MODE_KANJI) {
             
-                if ($pos+1 < strlen($this->dataStr)) 
+                if ($pos+1 < @strlen($this->dataStr)) 
                 {
                     $d = $this->dataStr[$pos+1];
                     $word = (ord($c) << 8) | ord($d);
@@ -2133,7 +2133,7 @@
             $ln = QRspec::lengthIndicator(QR_MODE_NUM, $this->input->getVersion());
 
             $p = 1;
-            $dataStrLen = strlen($this->dataStr);
+            $dataStrLen = @strlen($this->dataStr);
             
             while($p < $dataStrLen) {
                 
@@ -2184,7 +2184,7 @@
         //----------------------------------------------------------------------
         public function splitString()
         {
-            while (strlen($this->dataStr) > 0)
+            while (@strlen($this->dataStr) > 0)
             {
                 if($this->dataStr == '')
                     return 0;
@@ -2206,18 +2206,18 @@
                 if($length == 0) return 0;
                 if($length < 0)  return -1;
                 
-                $this->dataStr = substr($this->dataStr, $length);
+                $this->dataStr = @substr($this->dataStr, $length);
             }
         }
 
         //----------------------------------------------------------------------
         public function toUpper()
         {
-            $stringLen = strlen($this->dataStr);
+            $stringLen = @strlen($this->dataStr);
             $p = 0;
             
             while ($p<$stringLen) {
-                $mode = self::identifyMode(substr($this->dataStr, $p), $this->modeHint);
+                $mode = self::identifyMode(@substr($this->dataStr, $p), $this->modeHint);
                 if($mode == QR_MODE_KANJI) {
                     $p += 2;
                 } else {
@@ -2602,7 +2602,7 @@
         {
             $codeArr = array();
             
-            $codeLines = explode("\n", gzuncompress($code));
+            $codeLines = @explode("\n", gzuncompress($code));
             foreach ($codeLines as $line)
                 $codeArr[] = str_split($line);
             
@@ -3059,7 +3059,7 @@
             $input = new QRinput($version, $level);
             if($input == NULL) return NULL;
 
-            $ret = $input->append($input, QR_MODE_8, strlen($string), str_split($string));
+            $ret = $input->append($input, QR_MODE_8, @strlen($string), str_split($string));
             if($ret < 0) {
                 unset($input);
                 return NULL;
diff --git a/externals/porter-stemmer/src/Porter.php b/externals/porter-stemmer/src/Porter.php
--- a/externals/porter-stemmer/src/Porter.php
+++ b/externals/porter-stemmer/src/Porter.php
@@ -63,7 +63,7 @@
      */
     public static function Stem($word)
     {
-        if (strlen($word) <= 2) {
+        if (@strlen($word) <= 2) {
             return $word;
         }
 
@@ -83,7 +83,7 @@
     private static function step1ab($word)
     {
         // Part a
-        if (substr($word, -1) == 's') {
+        if (@substr($word, -1) == 's') {
 
                self::replace($word, 'sses', 'ss')
             OR self::replace($word, 'ies', 'i')
@@ -92,12 +92,12 @@
         }
 
         // Part b
-        if (substr($word, -2, 1) != 'e' OR !self::replace($word, 'eed', 'ee', 0)) { // First rule
+        if (@substr($word, -2, 1) != 'e' OR !self::replace($word, 'eed', 'ee', 0)) { // First rule
             $v = self::$regex_vowel;
 
             // ing and ed
-            if (   preg_match("#$v+#", substr($word, 0, -3)) && self::replace($word, 'ing', '')
-                OR preg_match("#$v+#", substr($word, 0, -2)) && self::replace($word, 'ed', '')) { // Note use of && and OR, for precedence reasons
+            if (   @preg_match("#$v+#", @substr($word, 0, -3)) && self::replace($word, 'ing', '')
+                OR @preg_match("#$v+#", @substr($word, 0, -2)) && self::replace($word, 'ed', '')) { // Note use of && and OR, for precedence reasons
 
                 // If one of above two test successful
                 if (    !self::replace($word, 'at', 'ate')
@@ -106,11 +106,11 @@
 
                     // Double consonant ending
                     if (    self::doubleConsonant($word)
-                        AND substr($word, -2) != 'll'
-                        AND substr($word, -2) != 'ss'
-                        AND substr($word, -2) != 'zz') {
+                        AND @substr($word, -2) != 'll'
+                        AND @substr($word, -2) != 'ss'
+                        AND @substr($word, -2) != 'zz') {
 
-                        $word = substr($word, 0, -1);
+                        $word = @substr($word, 0, -1);
 
                     } elseif (self::m($word) == 1 AND self::cvc($word)) {
                         $word .= 'e';
@@ -131,7 +131,7 @@
     {
         $v = self::$regex_vowel;
 
-        if (substr($word, -1) == 'y' && preg_match("#$v+#", substr($word, 0, -1))) {
+        if (@substr($word, -1) == 'y' && @preg_match("#$v+#", @substr($word, 0, -1))) {
             self::replace($word, 'y', 'i');
         }
 
@@ -145,7 +145,7 @@
      */
     private static function step2($word)
     {
-        switch (substr($word, -2, 1)) {
+        switch (@substr($word, -2, 1)) {
             case 'a':
                    self::replace($word, 'ational', 'ate', 0)
                 OR self::replace($word, 'tional', 'tion', 0);
@@ -202,7 +202,7 @@
      */
     private static function step3($word)
     {
-        switch (substr($word, -2, 1)) {
+        switch (@substr($word, -2, 1)) {
             case 'a':
                 self::replace($word, 'ical', 'ic', 0);
                 break;
@@ -239,7 +239,7 @@
      */
     private static function step4($word)
     {
-        switch (substr($word, -2, 1)) {
+        switch (@substr($word, -2, 1)) {
             case 'a':
                 self::replace($word, 'al', '', 1);
                 break;
@@ -270,7 +270,7 @@
                 break;
 
             case 'o':
-                if (substr($word, -4) == 'tion' OR substr($word, -4) == 'sion') {
+                if (@substr($word, -4) == 'tion' OR @substr($word, -4) == 'sion') {
                    self::replace($word, 'ion', '', 1);
                 } else {
                     self::replace($word, 'ou', '', 1);
@@ -310,21 +310,21 @@
     private static function step5($word)
     {
         // Part a
-        if (substr($word, -1) == 'e') {
-            if (self::m(substr($word, 0, -1)) > 1) {
+        if (@substr($word, -1) == 'e') {
+            if (self::m(@substr($word, 0, -1)) > 1) {
                 self::replace($word, 'e', '');
 
-            } elseif (self::m(substr($word, 0, -1)) == 1) {
+            } elseif (self::m(@substr($word, 0, -1)) == 1) {
 
-                if (!self::cvc(substr($word, 0, -1))) {
+                if (!self::cvc(@substr($word, 0, -1))) {
                     self::replace($word, 'e', '');
                 }
             }
         }
 
         // Part b
-        if (self::m($word) > 1 AND self::doubleConsonant($word) AND substr($word, -1) == 'l') {
-            $word = substr($word, 0, -1);
+        if (self::m($word) > 1 AND self::doubleConsonant($word) AND @substr($word, -1) == 'l') {
+            $word = @substr($word, 0, -1);
         }
 
         return $word;
@@ -347,10 +347,10 @@
      */
     private static function replace(&$str, $check, $repl, $m = null)
     {
-        $len = 0 - strlen($check);
+        $len = 0 - @strlen($check);
 
-        if (substr($str, $len) == $check) {
-            $substr = substr($str, 0, $len);
+        if (@substr($str, $len) == $check) {
+            $substr = @substr($str, 0, $len);
             if (is_null($m) OR self::m($substr) > $m) {
                 $str = $substr . $repl;
             }
@@ -402,7 +402,7 @@
     {
         $c = self::$regex_consonant;
 
-        return preg_match("#$c{2}$#", $str, $matches) AND $matches[0][0] == $matches[0][1];
+        return @preg_match("#$c{2}$#", $str, $matches) AND $matches[0][0] == $matches[0][1];
     }
 
     /**
@@ -417,8 +417,8 @@
         $c = self::$regex_consonant;
         $v = self::$regex_vowel;
 
-        return     preg_match("#($c$v$c)$#", $str, $matches)
-               AND strlen($matches[1]) == 3
+        return     @preg_match("#($c$v$c)$#", $str, $matches)
+               AND @strlen($matches[1]) == 3
                AND $matches[1][2] != 'w'
                AND $matches[1][2] != 'x'
                AND $matches[1][2] != 'y';
diff --git a/externals/stripe-php/lib/Stripe/ApiRequestor.php b/externals/stripe-php/lib/Stripe/ApiRequestor.php
--- a/externals/stripe-php/lib/Stripe/ApiRequestor.php
+++ b/externals/stripe-php/lib/Stripe/ApiRequestor.php
@@ -223,7 +223,7 @@
     }
 
     $curl = curl_init();
-    $method = strtolower($method);
+    $method = @strtolower($method);
     $opts = array();
     if ($method == 'get') {
       $opts[CURLOPT_HTTPGET] = 1;
@@ -342,7 +342,7 @@
       return true;
     }
 
-    if (strpos(PHP_VERSION, 'hiphop') !== false) {
+    if (@strpos(PHP_VERSION, 'hiphop') !== false) {
       error_log(
           'Warning: HHVM does not support Stripe\'s SSL certificate '.
           'verification. (See http://docs.hhvm.com/manual/en/context.ssl.php) '.
@@ -400,7 +400,7 @@
   public static function isBlackListed($certificate)
   {
     $certificate = trim($certificate);
-    $lines = explode("\n", $certificate);
+    $lines = @explode("\n", $certificate);
 
     // Kludgily remove the PEM padding
     array_shift($lines); array_pop($lines);
diff --git a/externals/stripe-php/lib/Stripe/ApiResource.php b/externals/stripe-php/lib/Stripe/ApiResource.php
--- a/externals/stripe-php/lib/Stripe/ApiResource.php
+++ b/externals/stripe-php/lib/Stripe/ApiResource.php
@@ -36,18 +36,18 @@
   {
     // Useful for namespaces: Foo\Stripe_Charge
     if ($postfixNamespaces = strrchr($class, '\\')) {
-      $class = substr($postfixNamespaces, 1);
+      $class = @substr($postfixNamespaces, 1);
     }
     // Useful for underscored 'namespaces': Foo_Stripe_Charge
     if ($postfixFakeNamespaces = strrchr($class, 'Stripe_')) {
       $class = $postfixFakeNamespaces;
     }
-    if (substr($class, 0, strlen('Stripe')) == 'Stripe') {
-      $class = substr($class, strlen('Stripe'));
+    if (@substr($class, 0, @strlen('Stripe')) == 'Stripe') {
+      $class = @substr($class, @strlen('Stripe'));
     }
     $class = str_replace('_', '', $class);
     $name = urlencode($class);
-    $name = strtolower($name);
+    $name = @strtolower($name);
     return $name;
   }
 
diff --git a/externals/xhprof/xhprof_lib.php b/externals/xhprof/xhprof_lib.php
--- a/externals/xhprof/xhprof_lib.php
+++ b/externals/xhprof/xhprof_lib.php
@@ -70,7 +70,7 @@
  * @author Kannan
  */
 function xhprof_parse_parent_child($parent_child) {
-  $ret = explode("==>", $parent_child);
+  $ret = @explode("==>", $parent_child);
 
   // Return if both parent and child are set
   if (isset($ret[1])) {
@@ -315,10 +315,10 @@
       if ($use_script_name) {
         // if this is an old edge originating from main(), it now
         // needs to be from '__script::$page'
-        if (substr($parent_child, 0, 9) == "main()==>") {
-          $child =substr($parent_child, 9);
+        if (@substr($parent_child, 0, 9) == "main()==>") {
+          $child =@substr($parent_child, 9);
           // ignore the newly added edge from main()
-          if (substr($child, 0, 10) != "__script::") {
+          if (@substr($child, 0, 10) != "__script::") {
             $parent_child = xhprof_build_parent_child_key("__script::$page",
                                                           $child);
           }
@@ -764,7 +764,7 @@
   // trim leading/trailing whitespace
   $val = trim($val);
 
-  switch (strtolower($val)) {
+  switch (@strtolower($val)) {
   case '0':
   case '1':
     $val = (bool)$val;
diff --git a/resources/sql/autopatches/20140108.ddbpname.2.php b/resources/sql/autopatches/20140108.ddbpname.2.php
--- a/resources/sql/autopatches/20140108.ddbpname.2.php
+++ b/resources/sql/autopatches/20140108.ddbpname.2.php
@@ -10,7 +10,7 @@
 
   echo pht('Populating blueprint %d...', $id)."\n";
 
-  if (!strlen($blueprint->getBlueprintName())) {
+  if (!@strlen($blueprint->getBlueprintName())) {
     queryfx(
       $conn_w,
       'UPDATE %T SET blueprintName = %s WHERE id = %d',
diff --git a/resources/sql/autopatches/20140210.projcfield.1.blurb.php b/resources/sql/autopatches/20140210.projcfield.1.blurb.php
--- a/resources/sql/autopatches/20140210.projcfield.1.blurb.php
+++ b/resources/sql/autopatches/20140210.projcfield.1.blurb.php
@@ -10,7 +10,7 @@
   $phid = $row['projectPHID'];
 
   $desc = $row['blurb'];
-  if (strlen($desc)) {
+  if (@strlen($desc)) {
     queryfx(
       $conn_w,
       'INSERT IGNORE INTO %T (objectPHID, fieldIndex, fieldValue)
diff --git a/resources/sql/autopatches/20140211.dx.2.migcommenttext.php b/resources/sql/autopatches/20140211.dx.2.migcommenttext.php
--- a/resources/sql/autopatches/20140211.dx.2.migcommenttext.php
+++ b/resources/sql/autopatches/20140211.dx.2.migcommenttext.php
@@ -10,7 +10,7 @@
 foreach ($rows as $row) {
   $id = $row['id'];
   echo pht('Migrating Differential comment %d...', $id)."\n";
-  if (!strlen($row['content'])) {
+  if (!@strlen($row['content'])) {
     echo pht('Comment has no text, continuing.')."\n";
     continue;
   }
diff --git a/resources/sql/autopatches/20140410.accountsecret.2.php b/resources/sql/autopatches/20140410.accountsecret.2.php
--- a/resources/sql/autopatches/20140410.accountsecret.2.php
+++ b/resources/sql/autopatches/20140410.accountsecret.2.php
@@ -6,7 +6,7 @@
   $id = $user->getID();
   echo pht('Updating %d...', $id)."\n";
 
-  if (strlen($user->getAccountSecret())) {
+  if (@strlen($user->getAccountSecret())) {
     continue;
   }
 
diff --git a/resources/sql/autopatches/20140722.audit.4.migtext.php b/resources/sql/autopatches/20140722.audit.4.migtext.php
--- a/resources/sql/autopatches/20140722.audit.4.migtext.php
+++ b/resources/sql/autopatches/20140722.audit.4.migtext.php
@@ -10,7 +10,7 @@
 foreach ($rows as $row) {
   $id = $row['id'];
   echo pht('Migrating Audit comment %d...', $id)."\n";
-  if (!strlen($row['content'])) {
+  if (!@strlen($row['content'])) {
     echo pht('Comment has no text, continuing.')."\n";
     continue;
   }
diff --git a/resources/sql/autopatches/20141107.phriction.policy.2.php b/resources/sql/autopatches/20141107.phriction.policy.2.php
--- a/resources/sql/autopatches/20141107.phriction.policy.2.php
+++ b/resources/sql/autopatches/20141107.phriction.policy.2.php
@@ -25,8 +25,8 @@
   $slug = $doc->getSlug();
   $slug = PhabricatorSlug::normalize($slug);
   $prefix = 'projects/';
-  if (($slug != $prefix) && (strncmp($slug, $prefix, strlen($prefix)) === 0)) {
-    $parts = explode('/', $slug);
+  if (($slug != $prefix) && (strncmp($slug, $prefix, @strlen($prefix)) === 0)) {
+    $parts = @explode('/', $slug);
 
     $project_slug = $parts[1];
     $project_slug = PhabricatorSlug::normalizeProjectSlug($project_slug);
diff --git a/resources/sql/autopatches/20141107.phriction.popkeys.php b/resources/sql/autopatches/20141107.phriction.popkeys.php
--- a/resources/sql/autopatches/20141107.phriction.popkeys.php
+++ b/resources/sql/autopatches/20141107.phriction.popkeys.php
@@ -9,7 +9,7 @@
   $id = $doc->getID();
 
   $key = $doc->getMailKey();
-  if ((strlen($key) == 20) && (strpos($key, "\0") === false)) {
+  if ((@strlen($key) == 20) && (@strpos($key, "\0") === false)) {
     // To be valid, keys must have length 20 and not contain any null bytes.
     // See T6487.
     echo pht('Document has valid mailkey.')."\n";
diff --git a/resources/sql/autopatches/20150506.calendarunnamedevents.1.php b/resources/sql/autopatches/20150506.calendarunnamedevents.1.php
--- a/resources/sql/autopatches/20150506.calendarunnamedevents.1.php
+++ b/resources/sql/autopatches/20150506.calendarunnamedevents.1.php
@@ -8,7 +8,7 @@
 foreach ($iterator as $event) {
   $id = $event->getID();
 
-  if (strlen($event->getName()) == 0) {
+  if (@strlen($event->getName()) == 0) {
     echo pht('Renaming event %d...', $id)."\n";
     $viewer = PhabricatorUser::getOmnipotentUser();
 
diff --git a/resources/sql/autopatches/20150602.mlist.2.php b/resources/sql/autopatches/20150602.mlist.2.php
--- a/resources/sql/autopatches/20150602.mlist.2.php
+++ b/resources/sql/autopatches/20150602.mlist.2.php
@@ -14,7 +14,7 @@
   $username = preg_replace('/[^a-zA-Z0-9_-]+/', '-', $name);
   $username = preg_replace('/-{2,}/', '-', $username);
   $username = trim($username, '-');
-  if (!strlen($username)) {
+  if (!@strlen($username)) {
     $username = 'mailinglist';
   }
   $username .= '-list';
diff --git a/resources/sql/autopatches/20151210.land.2.refphid.php b/resources/sql/autopatches/20151210.land.2.refphid.php
--- a/resources/sql/autopatches/20151210.land.2.refphid.php
+++ b/resources/sql/autopatches/20151210.land.2.refphid.php
@@ -4,7 +4,7 @@
 $conn_w = $table->establishConnection('w');
 
 foreach (new LiskMigrationIterator($table) as $cursor) {
-  if (strlen($cursor->getPHID())) {
+  if (@strlen($cursor->getPHID())) {
     continue;
   }
 
diff --git a/resources/sql/autopatches/20151218.key.2.keyphid.php b/resources/sql/autopatches/20151218.key.2.keyphid.php
--- a/resources/sql/autopatches/20151218.key.2.keyphid.php
+++ b/resources/sql/autopatches/20151218.key.2.keyphid.php
@@ -4,7 +4,7 @@
 $conn_w = $table->establishConnection('w');
 
 foreach (new LiskMigrationIterator($table) as $cursor) {
-  if (strlen($cursor->getPHID())) {
+  if (@strlen($cursor->getPHID())) {
     continue;
   }
 
diff --git a/resources/sql/autopatches/20151223.proj.05.updatekeys.php b/resources/sql/autopatches/20151223.proj.05.updatekeys.php
--- a/resources/sql/autopatches/20151223.proj.05.updatekeys.php
+++ b/resources/sql/autopatches/20151223.proj.05.updatekeys.php
@@ -7,12 +7,12 @@
   $path = $project->getProjectPath();
   $key = $project->getProjectPathKey();
 
-  if (strlen($path) && ($key !== "\0\0\0\0")) {
+  if (@strlen($path) && ($key !== "\0\0\0\0")) {
     continue;
   }
 
   $path_key = PhabricatorHash::digestForIndex($project->getPHID());
-  $path_key = substr($path_key, 0, 4);
+  $path_key = @substr($path_key, 0, 4);
 
   queryfx(
     $conn_w,
diff --git a/resources/sql/autopatches/20160110.repo.02.slug.php b/resources/sql/autopatches/20160110.repo.02.slug.php
--- a/resources/sql/autopatches/20160110.repo.02.slug.php
+++ b/resources/sql/autopatches/20160110.repo.02.slug.php
@@ -12,7 +12,7 @@
 
   $clone_name = $repository->getDetail('clone-name');
 
-  if (!strlen($clone_name)) {
+  if (!@strlen($clone_name)) {
     continue;
   }
 
diff --git a/resources/sql/autopatches/20160202.ipv6.2.php b/resources/sql/autopatches/20160202.ipv6.2.php
--- a/resources/sql/autopatches/20160202.ipv6.2.php
+++ b/resources/sql/autopatches/20160202.ipv6.2.php
@@ -11,7 +11,7 @@
     $addr = $row->getRemoteAddress();
 
     $addr = (string)$addr;
-    if (!strlen($addr)) {
+    if (!@strlen($addr)) {
       continue;
     }
 
@@ -24,7 +24,7 @@
     }
 
     $ip = long2ip($addr);
-    if (!is_string($ip) || !strlen($ip)) {
+    if (!is_string($ip) || !@strlen($ip)) {
       continue;
     }
 
diff --git a/resources/sql/autopatches/20160503.repo.03.lpathmigrate.php b/resources/sql/autopatches/20160503.repo.03.lpathmigrate.php
--- a/resources/sql/autopatches/20160503.repo.03.lpathmigrate.php
+++ b/resources/sql/autopatches/20160503.repo.03.lpathmigrate.php
@@ -8,13 +8,13 @@
 
 foreach (new LiskMigrationIterator($table) as $repository) {
   $local_path = $repository->getLocalPath();
-  if (strlen($local_path)) {
+  if (@strlen($local_path)) {
     // Repository already has a modern, unique local path.
     continue;
   }
 
   $local_path = $repository->getDetail('local-path');
-  if (!strlen($local_path)) {
+  if (!@strlen($local_path)) {
     // Repository does not have a local path using the older format.
     continue;
   }
diff --git a/resources/sql/autopatches/20160503.repo.05.urimigrate.php b/resources/sql/autopatches/20160503.repo.05.urimigrate.php
--- a/resources/sql/autopatches/20160503.repo.05.urimigrate.php
+++ b/resources/sql/autopatches/20160503.repo.05.urimigrate.php
@@ -51,7 +51,7 @@
 
   if (!$repository->isHosted()) {
     $remote_uri = $repository->getDetail('remote-uri');
-    if (strlen($remote_uri)) {
+    if (@strlen($remote_uri)) {
       $uris[] = PhabricatorRepositoryURI::initializeNewURI()
         ->setRepositoryPHID($repository->getPHID())
         ->attachRepository($repository)
diff --git a/resources/sql/autopatches/20160601.user.02.copyprefs.php b/resources/sql/autopatches/20160601.user.02.copyprefs.php
--- a/resources/sql/autopatches/20160601.user.02.copyprefs.php
+++ b/resources/sql/autopatches/20160601.user.02.copyprefs.php
@@ -28,17 +28,17 @@
   }
 
   $zone = $row['timezoneIdentifier'];
-  if (strlen($zone)) {
+  if (@strlen($zone)) {
     $prefs[PhabricatorTimezoneSetting::SETTINGKEY] = $zone;
   }
 
   $pronoun = $row['sex'];
-  if (strlen($pronoun)) {
+  if (@strlen($pronoun)) {
     $prefs[PhabricatorPronounSetting::SETTINGKEY] = $pronoun;
   }
 
   $translation = $row['translation'];
-  if (strlen($translation)) {
+  if (@strlen($translation)) {
     $prefs[PhabricatorTranslationSetting::SETTINGKEY] = $translation;
   }
 
diff --git a/resources/sql/autopatches/20170528.maniphestdupes.php b/resources/sql/autopatches/20170528.maniphestdupes.php
--- a/resources/sql/autopatches/20170528.maniphestdupes.php
+++ b/resources/sql/autopatches/20170528.maniphestdupes.php
@@ -32,7 +32,7 @@
         $pattern = '/^\xE2\x9C\x98 Merged into T(\d+)\.$/';
         $matches = array();
 
-        if (preg_match($pattern, $comment, $matches)) {
+        if (@preg_match($pattern, $comment, $matches)) {
           $dst_task = id(new ManiphestTaskQuery())
             ->setViewer($viewer)
             ->withIDs(array($matches[1]))
diff --git a/resources/sql/autopatches/20180215.phriction.02.phidvalues.php b/resources/sql/autopatches/20180215.phriction.02.phidvalues.php
--- a/resources/sql/autopatches/20180215.phriction.02.phidvalues.php
+++ b/resources/sql/autopatches/20180215.phriction.02.phidvalues.php
@@ -4,7 +4,7 @@
 $conn = $table->establishConnection('w');
 
 foreach (new LiskMigrationIterator($table) as $row) {
-  if (strlen($row->getPHID())) {
+  if (@strlen($row->getPHID())) {
     continue;
   }
 
diff --git a/resources/sql/autopatches/20181031.board.01.queryreset.php b/resources/sql/autopatches/20181031.board.01.queryreset.php
--- a/resources/sql/autopatches/20181031.board.01.queryreset.php
+++ b/resources/sql/autopatches/20181031.board.01.queryreset.php
@@ -15,7 +15,7 @@
 
 foreach ($iterator as $project) {
   $default_filter = $project->getDefaultWorkboardFilter();
-  if (!strlen($default_filter)) {
+  if (!@strlen($default_filter)) {
     continue;
   }
 
diff --git a/resources/sql/autopatches/20181213.auth.02.populatephid.php b/resources/sql/autopatches/20181213.auth.02.populatephid.php
--- a/resources/sql/autopatches/20181213.auth.02.populatephid.php
+++ b/resources/sql/autopatches/20181213.auth.02.populatephid.php
@@ -5,7 +5,7 @@
 $conn = $table->establishConnection('w');
 
 foreach ($iterator as $session) {
-  if (strlen($session->getPHID())) {
+  if (@strlen($session->getPHID())) {
     continue;
   }
 
diff --git a/resources/sql/autopatches/20190115.mfa.02.migrate.php b/resources/sql/autopatches/20190115.mfa.02.migrate.php
--- a/resources/sql/autopatches/20190115.mfa.02.migrate.php
+++ b/resources/sql/autopatches/20190115.mfa.02.migrate.php
@@ -27,7 +27,7 @@
   }
 
   // This factor already has an associated provider.
-  if (strlen($row['factorProviderPHID'])) {
+  if (@strlen($row['factorProviderPHID'])) {
     continue;
   }
 
diff --git a/resources/sql/autopatches/20190206.external.04.providerlink.php b/resources/sql/autopatches/20190206.external.04.providerlink.php
--- a/resources/sql/autopatches/20190206.external.04.providerlink.php
+++ b/resources/sql/autopatches/20190206.external.04.providerlink.php
@@ -8,7 +8,7 @@
 $config_conn = $config_table->establishConnection('w');
 
 foreach (new LiskRawMigrationIterator($account_conn, $table_name) as $row) {
-  if (strlen($row['providerConfigPHID'])) {
+  if (@strlen($row['providerConfigPHID'])) {
     continue;
   }
 
diff --git a/resources/sql/autopatches/20191114.email.02.populate.php b/resources/sql/autopatches/20191114.email.02.populate.php
--- a/resources/sql/autopatches/20191114.email.02.populate.php
+++ b/resources/sql/autopatches/20191114.email.02.populate.php
@@ -7,7 +7,7 @@
 foreach ($iterator as $row) {
   $phid = $row['phid'];
 
-  if (!strlen($phid)) {
+  if (!@strlen($phid)) {
     queryfx(
       $conn,
       'UPDATE %R SET phid = %s WHERE id = %d',
diff --git a/resources/sql/autopatches/20200222.xident.01.migrate.php b/resources/sql/autopatches/20200222.xident.01.migrate.php
--- a/resources/sql/autopatches/20200222.xident.01.migrate.php
+++ b/resources/sql/autopatches/20200222.xident.01.migrate.php
@@ -18,7 +18,7 @@
   }
 
   $account_id = $account_row['accountID'];
-  if (!strlen($account_id)) {
+  if (!@strlen($account_id)) {
     continue;
   }
 
diff --git a/resources/sql/autopatches/20210215.changeset.02.phid-populate.php b/resources/sql/autopatches/20210215.changeset.02.phid-populate.php
--- a/resources/sql/autopatches/20210215.changeset.02.phid-populate.php
+++ b/resources/sql/autopatches/20210215.changeset.02.phid-populate.php
@@ -36,7 +36,7 @@
   foreach ($chunk as $changeset_row) {
     $phid = $changeset_row['phid'];
 
-    if (strlen($phid)) {
+    if (@strlen($phid)) {
       continue;
     }
 
diff --git a/resources/sql/autopatches/20210802.legalpad_document_signature.02.phid-populate.php b/resources/sql/autopatches/20210802.legalpad_document_signature.02.phid-populate.php
--- a/resources/sql/autopatches/20210802.legalpad_document_signature.02.phid-populate.php
+++ b/resources/sql/autopatches/20210802.legalpad_document_signature.02.phid-populate.php
@@ -36,7 +36,7 @@
   foreach ($chunk as $docsig_row) {
     $phid = $docsig_row['phid'];
 
-    if (strlen($phid)) {
+    if (@strlen($phid)) {
       continue;
     }
 
diff --git a/resources/sql/patches/090.forceuniqueprojectnames.php b/resources/sql/patches/090.forceuniqueprojectnames.php
--- a/resources/sql/patches/090.forceuniqueprojectnames.php
+++ b/resources/sql/patches/090.forceuniqueprojectnames.php
@@ -12,7 +12,7 @@
 foreach ($projects as $project) {
   $slug = PhabricatorSlug::normalizeProjectSlug($project->getName());
 
-  if (!strlen($slug)) {
+  if (!@strlen($slug)) {
     $project_id = $project->getID();
     echo pht("Project #%d doesn't have a meaningful name...", $project_id)."\n";
     $project->setName(trim(pht('Unnamed Project %s', $project->getName())));
diff --git a/resources/sql/patches/093.gitremotes.php b/resources/sql/patches/093.gitremotes.php
--- a/resources/sql/patches/093.gitremotes.php
+++ b/resources/sql/patches/093.gitremotes.php
@@ -16,11 +16,11 @@
   $details = json_decode($repo['details'], true);
 
   $old = idx($details, 'default-branch', '');
-  if (strpos($old, '/') === false) {
+  if (@strpos($old, '/') === false) {
     continue;
   }
 
-  $parts = explode('/', $old);
+  $parts = @explode('/', $old);
   $parts = array_filter($parts);
   $new = end($parts);
 
diff --git a/resources/sql/patches/20130219.commitsummarymig.php b/resources/sql/patches/20130219.commitsummarymig.php
--- a/resources/sql/patches/20130219.commitsummarymig.php
+++ b/resources/sql/patches/20130219.commitsummarymig.php
@@ -8,7 +8,7 @@
 foreach ($commits as $commit) {
   echo pht('Filling Commit #%d', $commit->getID())."\n";
 
-  if (strlen($commit->getSummary())) {
+  if (@strlen($commit->getSummary())) {
     continue;
   }
 
diff --git a/resources/sql/patches/20130921.xmigratemaniphest.php b/resources/sql/patches/20130921.xmigratemaniphest.php
--- a/resources/sql/patches/20130921.xmigratemaniphest.php
+++ b/resources/sql/patches/20130921.xmigratemaniphest.php
@@ -28,7 +28,7 @@
 
   $task_phid = $task_row['phid'];
 
-  $has_comment = strlen(trim($row['comments']));
+  $has_comment = @strlen(trim($row['comments']));
 
   $xaction_type = $row['transactionType'];
   $xaction_old = $row['oldValue'];
@@ -46,7 +46,7 @@
     $xaction_type = PhabricatorTransactions::TYPE_CUSTOMFIELD;
 
     $aux_key = idx($xaction_meta, 'aux:key');
-    if (!preg_match('/^std:maniphest:/', $aux_key)) {
+    if (!@preg_match('/^std:maniphest:/', $aux_key)) {
       $aux_key = 'std:maniphest:'.$aux_key;
     }
 
diff --git a/resources/sql/patches/20131106.diffphid.2.mig.php b/resources/sql/patches/20131106.diffphid.2.mig.php
--- a/resources/sql/patches/20131106.diffphid.2.mig.php
+++ b/resources/sql/patches/20131106.diffphid.2.mig.php
@@ -16,7 +16,7 @@
     echo pht('Migrating diff ID %d...', $id)."\n";
 
     $phid = $diff->getPHID();
-    if (strlen($phid)) {
+    if (@strlen($phid)) {
       continue;
     }
 
diff --git a/scripts/celerity/generate_emoji.php b/scripts/celerity/generate_emoji.php
--- a/scripts/celerity/generate_emoji.php
+++ b/scripts/celerity/generate_emoji.php
@@ -32,7 +32,7 @@
   $data = array();
   foreach ($emojis as $shortname => $emoji) {
     $unicode = $emoji['unicode'];
-    $codes = explode('-', $unicode);
+    $codes = @explode('-', $unicode);
     $hex = '';
     foreach ($codes as $code) {
       $hex .= phutil_utf8_encode_codepoint(hexdec($code));
diff --git a/scripts/mail/mail_handler.php b/scripts/mail/mail_handler.php
--- a/scripts/mail/mail_handler.php
+++ b/scripts/mail/mail_handler.php
@@ -5,7 +5,7 @@
 // Some day, we could take a shot at cleaning this up.
 if ($argc > 1) {
   foreach (array_slice($argv, 1) as $arg) {
-    if (!preg_match('/^-/', $arg)) {
+    if (!@preg_match('/^-/', $arg)) {
       $_SERVER['PHABRICATOR_ENV'] = $arg;
       break;
     }
@@ -39,14 +39,14 @@
 foreach (array('text', 'html') as $part) {
   $part_body = $parser->getMessageBody($part);
 
-  if (strlen($part_body) && !phutil_is_utf8($part_body)) {
+  if (@strlen($part_body) && !phutil_is_utf8($part_body)) {
     $part_headers = $parser->getMessageBodyHeaders($part);
     if (!is_array($part_headers)) {
       $part_headers = array();
     }
     $content_type = idx($part_headers, 'content-type');
-    if (preg_match('/charset="(.*?)"/', $content_type, $matches) ||
-        preg_match('/charset=(\S+)/', $content_type, $matches)) {
+    if (@preg_match('/charset="(.*?)"/', $content_type, $matches) ||
+        @preg_match('/charset=(\S+)/', $content_type, $matches)) {
       $part_body = phutil_utf8_convert($part_body, 'UTF-8', $matches[1]);
     }
   }
@@ -68,7 +68,7 @@
 
 $attachments = array();
 foreach ($parser->getAttachments() as $attachment) {
-  if (preg_match('@text/(plain|html)@', $attachment->getContentType()) &&
+  if (@preg_match('@text/(plain|html)@', $attachment->getContentType()) &&
       $attachment->getContentDisposition() == 'inline') {
     // If this is an "inline" attachment with some sort of text content-type,
     // do not treat it as a file for attachment. MimeMailParser already picked
diff --git a/scripts/repository/commit_hook.php b/scripts/repository/commit_hook.php
--- a/scripts/repository/commit_hook.php
+++ b/scripts/repository/commit_hook.php
@@ -21,7 +21,7 @@
 
 if ($argc > 1) {
   $context = $argv[1];
-  $context = explode(':', $context, 2);
+  $context = @explode(':', $context, 2);
   $argv[1] = $context[0];
 
   if (count($context) > 1) {
@@ -119,7 +119,7 @@
   exit($err);
 } else if ($repository->isGit() || $repository->isHg()) {
   $username = getenv(DiffusionCommitHookEngine::ENV_USER);
-  if (!strlen($username)) {
+  if (!@strlen($username)) {
     throw new Exception(
       pht(
         'No Direct Pushes: You are pushing directly to a repository hosted '.
@@ -181,17 +181,17 @@
 $engine->setOriginalArgv(array_slice($argv, 2));
 
 $remote_address = getenv(DiffusionCommitHookEngine::ENV_REMOTE_ADDRESS);
-if (strlen($remote_address)) {
+if (@strlen($remote_address)) {
   $engine->setRemoteAddress($remote_address);
 }
 
 $remote_protocol = getenv(DiffusionCommitHookEngine::ENV_REMOTE_PROTOCOL);
-if (strlen($remote_protocol)) {
+if (@strlen($remote_protocol)) {
   $engine->setRemoteProtocol($remote_protocol);
 }
 
 $request_identifier = getenv(DiffusionCommitHookEngine::ENV_REQUEST);
-if (strlen($request_identifier)) {
+if (@strlen($request_identifier)) {
   $engine->setRequestIdentifier($request_identifier);
 }
 
diff --git a/scripts/sql/manage_storage.php b/scripts/sql/manage_storage.php
--- a/scripts/sql/manage_storage.php
+++ b/scripts/sql/manage_storage.php
@@ -95,7 +95,7 @@
 
 $host = $args->getArg('host');
 $ref_key = $args->getArg('ref');
-if (strlen($host) || strlen($ref_key)) {
+if (@strlen($host) || @strlen($ref_key)) {
   if ($host && $ref_key) {
     throw new PhutilArgumentUsageException(
       pht(
diff --git a/scripts/ssh/ssh-auth.php b/scripts/ssh/ssh-auth.php
--- a/scripts/ssh/ssh-auth.php
+++ b/scripts/ssh/ssh-auth.php
@@ -36,7 +36,7 @@
 
 $authstruct = null;
 
-if (strlen($authstruct_raw)) {
+if (@strlen($authstruct_raw)) {
   try {
     $authstruct = phutil_json_decode($authstruct_raw);
   } catch (Exception $ex) {
@@ -82,13 +82,13 @@
     // Strip out newlines and other nonsense from the key type and key body.
     $type = $ssh_key->getKeyType();
     $type = preg_replace('@[\x00-\x20]+@', '', $type);
-    if (!strlen($type)) {
+    if (!@strlen($type)) {
       continue;
     }
 
     $key = $ssh_key->getKeyBody();
     $key = preg_replace('@[\x00-\x20]+@', '', $key);
-    if (!strlen($key)) {
+    if (!@strlen($key)) {
       continue;
     }
 
@@ -135,7 +135,7 @@
 
   $cmd = csprintf('%s %Ls', $bin, $key_argv);
 
-  if (strlen($instance)) {
+  if (@strlen($instance)) {
     $cmd = csprintf('PHABRICATOR_INSTANCE=%s %C', $instance, $cmd);
   }
 
diff --git a/scripts/ssh/ssh-connect.php b/scripts/ssh/ssh-connect.php
--- a/scripts/ssh/ssh-connect.php
+++ b/scripts/ssh/ssh-connect.php
@@ -105,7 +105,7 @@
 
 $passthru_args = $unconsumed_argv;
 $host = array_shift($passthru_args);
-$parts = explode(':', $host, 2);
+$parts = @explode(':', $host, 2);
 $host = $parts[0];
 
 $port = $args->getArg('port');
diff --git a/scripts/ssh/ssh-exec.php b/scripts/ssh/ssh-exec.php
--- a/scripts/ssh/ssh-exec.php
+++ b/scripts/ssh/ssh-exec.php
@@ -71,7 +71,7 @@
   $ssh_client = getenv('SSH_CLIENT');
   if ($ssh_client) {
     // This has the format "<ip> <remote-port> <local-port>". Grab the IP.
-    $remote_address = head(explode(' ', $ssh_client));
+    $remote_address = head(@explode(' ', $ssh_client));
     $ssh_log->setData(
       array(
         'r' => $remote_address,
@@ -103,7 +103,7 @@
         '--phabricator-ssh-device',
         $user_name,
         $device_name));
-  } else if (strlen($user_name)) {
+  } else if (@strlen($user_name)) {
     $user = id(new PhabricatorPeopleQuery())
       ->setViewer(PhabricatorUser::getOmnipotentUser())
       ->withUsernames(array($user_name))
@@ -117,7 +117,7 @@
 
     id(new PhabricatorAuthSessionEngine())
       ->willServeRequestForUser($user);
-  } else if (strlen($device_name)) {
+  } else if (@strlen($device_name)) {
     if (!$remote_address) {
       throw new Exception(
         pht(
@@ -178,9 +178,9 @@
     // If we're authenticating as a device, the first argument may be a
     // "@username" argument to act as a particular user.
     $first_argument = head($original_argv);
-    if (preg_match('/^@/', $first_argument)) {
+    if (@preg_match('/^@/', $first_argument)) {
       $act_as_name = array_shift($original_argv);
-      $act_as_name = substr($act_as_name, 1);
+      $act_as_name = @substr($act_as_name, 1);
       $user = id(new PhabricatorPeopleQuery())
         ->setViewer(PhabricatorUser::getOmnipotentUser())
         ->withUsernames(array($act_as_name))
diff --git a/scripts/symbols/clear_repository_symbols.php b/scripts/symbols/clear_repository_symbols.php
--- a/scripts/symbols/clear_repository_symbols.php
+++ b/scripts/symbols/clear_repository_symbols.php
@@ -40,7 +40,7 @@
 
 $input = file_get_contents('php://stdin');
 $normalized = array();
-foreach (explode("\n", trim($input)) as $path) {
+foreach (@explode("\n", trim($input)) as $path) {
   // Emulate the behavior of the symbol generation scripts.
   $normalized[] = '/'.ltrim($path, './');
 }
diff --git a/scripts/symbols/generate_ctags_symbols.php b/scripts/symbols/generate_ctags_symbols.php
--- a/scripts/symbols/generate_ctags_symbols.php
+++ b/scripts/symbols/generate_ctags_symbols.php
@@ -38,8 +38,8 @@
 $data = array();
 $futures = array();
 
-foreach (explode("\n", trim($input)) as $file) {
-  if (!strlen($file)) {
+foreach (@explode("\n", trim($input)) as $file) {
+  if (!@strlen($file)) {
     continue;
   }
 
@@ -50,10 +50,10 @@
 $futures = new FutureIterator($futures);
 foreach ($futures->limit(8) as $file => $future) {
   $tags = $future->resolve();
-  $tags = explode("\n", $tags[1]);
+  $tags = @explode("\n", $tags[1]);
 
   foreach ($tags as $tag) {
-    $parts = explode(';', $tag);
+    $parts = @explode(';', $tag);
 
     // Skip lines that we can not parse.
     if (count($parts) < 2) {
@@ -61,11 +61,11 @@
     }
 
     // Split ctags information.
-    $tag_info = explode("\t", $parts[0]);
+    $tag_info = @explode("\t", $parts[0]);
 
     // Split exuberant ctags "extension fields" (additional information).
     $parts[1] = trim($parts[1], "\t \"");
-    $extension_fields = explode("\t", $parts[1]);
+    $extension_fields = @explode("\t", $parts[1]);
 
     // Skip lines that we can not parse.
     if (count($tag_info) < 3 || count($extension_fields) < 2) {
@@ -78,12 +78,12 @@
     list($type, $language, $context) = $extension_fields;
 
     // Skip lines with tokens containing a space.
-    if (strpos($token, ' ') !== false) {
+    if (@strpos($token, ' ') !== false) {
       continue;
     }
 
     // Strip "language:"
-    $language = substr($language, 9);
+    $language = @substr($language, 9);
 
     // To keep consistent with "Separate with commas, for example: php, py"
     // in Arcanist Project edit form.
@@ -94,10 +94,10 @@
     $language = str_ireplace('c#', 'cs', $language);
 
     // Ruby has "singleton method", for example.
-    $type = substr(str_replace(' ', '_', $type), 0, 12);
+    $type = @substr(str_replace(' ', '_', $type), 0, 12);
 
     // class:foo, struct:foo, union:foo, enum:foo, ...
-    $context = last(explode(':', $context, 2));
+    $context = last(@explode(':', $context, 2));
 
     $ignore = array(
       'variable' => true,
@@ -120,7 +120,7 @@
 
 function print_symbol($file, $line_num, $type, $token, $context, $language) {
   // Get rid of relative path.
-  $file = explode('/', $file);
+  $file = @explode('/', $file);
   if ($file[0] == '.' || $file[0] == '..') {
     array_shift($file);
   }
@@ -130,7 +130,7 @@
     $context,
     $token,
     $type,
-    strtolower($language),
+    @strtolower($language),
     $line_num,
     $file,
   );
diff --git a/scripts/symbols/generate_php_symbols.php b/scripts/symbols/generate_php_symbols.php
--- a/scripts/symbols/generate_php_symbols.php
+++ b/scripts/symbols/generate_php_symbols.php
@@ -26,8 +26,8 @@
 $data = array();
 $futures = array();
 
-foreach (explode("\n", trim($input)) as $file) {
-  if (!strlen($file)) {
+foreach (@explode("\n", trim($input)) as $file) {
+  if (!@strlen($file)) {
     continue;
   }
 
diff --git a/scripts/symbols/import_repository_symbols.php b/scripts/symbols/import_repository_symbols.php
--- a/scripts/symbols/import_repository_symbols.php
+++ b/scripts/symbols/import_repository_symbols.php
@@ -64,7 +64,7 @@
 
 $input = file_get_contents('php://stdin');
 $input = trim($input);
-$input = explode("\n", $input);
+$input = @explode("\n", $input);
 
 
 function commit_symbols(
@@ -117,7 +117,7 @@
 }
 
 function check_string_value($value, $field_name, $line_no, $max_length) {
-   if (strlen($value) > $max_length) {
+   if (@strlen($value) > $max_length) {
       throw new Exception(
         pht(
           "%s '%s' defined on line #%d is too long, ".
@@ -146,7 +146,7 @@
   try {
     $line_no = $key + 1;
     $matches = null;
-    $ok = preg_match(
+    $ok = @preg_match(
       '/^((?P<context>[^ ]+)? )?(?P<name>[^ ]+) (?P<type>[^ ]+) '.
       '(?P<lang>[^ ]+) (?P<line>\d+) (?P<path>.*)$/',
       $line,
@@ -178,7 +178,7 @@
     check_string_value($lang, pht('Symbol language'), $line_no, 32);
     check_string_value($path, pht('Path'), $line_no, 512);
 
-    if (!strlen($path) || $path[0] != '/') {
+    if (!@strlen($path) || $path[0] != '/') {
       throw new Exception(
         pht(
           "Path '%s' defined on line #%d is invalid. Paths should begin with ".
diff --git a/scripts/util/add_macro.php b/scripts/util/add_macro.php
--- a/scripts/util/add_macro.php
+++ b/scripts/util/add_macro.php
@@ -38,7 +38,7 @@
 
 $name = $args->getArg('as');
 if ($name === null) {
-  $name = head(explode('.', basename($path)));
+  $name = head(@explode('.', basename($path)));
 }
 
 $existing = id(new PhabricatorFileImageMacro())->loadOneWhere(
diff --git a/src/aphront/AphrontRequest.php b/src/aphront/AphrontRequest.php
--- a/src/aphront/AphrontRequest.php
+++ b/src/aphront/AphrontRequest.php
@@ -66,11 +66,11 @@
   }
 
   public static function parseURILineRange($range, $limit) {
-    if (!strlen($range)) {
+    if (!@strlen($range)) {
       return null;
     }
 
-    $range = explode('-', $range, 2);
+    $range = @explode('-', $range, 2);
 
     foreach ($range as $key => $value) {
       $value = (int)$value;
@@ -234,7 +234,7 @@
 
     $raw_data = phutil_string_cast($this->requestData[$name]);
     $raw_data = trim($raw_data);
-    if (!strlen($raw_data)) {
+    if (!@strlen($raw_data)) {
       return $default;
     }
 
@@ -448,7 +448,7 @@
   }
 
   private function getPrefixedCookieName($name) {
-    if (strlen($this->cookiePrefix)) {
+    if (@strlen($this->cookiePrefix)) {
       return $this->cookiePrefix.'_'.$name;
     } else {
       return $name;
@@ -499,7 +499,7 @@
     // domain is. This makes setup easier, and we'll tell administrators to
     // configure a base domain during the setup process.
     $base_uri = PhabricatorEnv::getEnvConfig('phabricator.base-uri');
-    if (!strlen($base_uri)) {
+    if (!@strlen($base_uri)) {
       return new PhutilURI('http://'.$host.'/');
     }
 
@@ -897,14 +897,14 @@
     // NOTE: apache_request_headers() might provide a nicer way to do this,
     // but isn't available under FCGI until PHP 5.4.0.
     foreach ($_SERVER as $key => $value) {
-      if (!preg_match('/^HTTP_/', $key)) {
+      if (!@preg_match('/^HTTP_/', $key)) {
         continue;
       }
 
       // Unmangle the header as best we can.
-      $key = substr($key, strlen('HTTP_'));
+      $key = @substr($key, @strlen('HTTP_'));
       $key = str_replace('_', ' ', $key);
-      $key = strtolower($key);
+      $key = @strtolower($key);
       $key = ucwords($key);
       $key = str_replace(' ', '-', $key);
 
@@ -912,7 +912,7 @@
       $should_forward = false;
 
       // Forward "X-Hgarg-..." headers.
-      if (preg_match('/^X-Hgarg-/', $key)) {
+      if (@preg_match('/^X-Hgarg-/', $key)) {
         $should_forward = true;
       }
 
@@ -956,7 +956,7 @@
     $submit_cookie = PhabricatorCookies::COOKIE_SUBMIT;
 
     $submit_key = $this->getCookie($submit_cookie);
-    if (strlen($submit_key)) {
+    if (@strlen($submit_key)) {
       $this->clearCookie($submit_cookie);
       $this->submitKey = $submit_key;
     }
diff --git a/src/aphront/__tests__/AphrontRoutingMapTestCase.php b/src/aphront/__tests__/AphrontRoutingMapTestCase.php
--- a/src/aphront/__tests__/AphrontRoutingMapTestCase.php
+++ b/src/aphront/__tests__/AphrontRoutingMapTestCase.php
@@ -37,7 +37,7 @@
 
     $pattern = implode('', $path);
     $pattern = '('.$pattern.')';
-    $ok = @preg_match($pattern, '');
+    $ok = @@preg_match($pattern, '');
 
     $this->assertTrue(
       ($ok !== false),
diff --git a/src/aphront/configuration/AphrontApplicationConfiguration.php b/src/aphront/configuration/AphrontApplicationConfiguration.php
--- a/src/aphront/configuration/AphrontApplicationConfiguration.php
+++ b/src/aphront/configuration/AphrontApplicationConfiguration.php
@@ -363,8 +363,10 @@
   private static function writeResponse(
     AphrontHTTPSink $sink,
     AphrontResponse $response) {
+    var_dump($response);
 
     $unexpected_output = PhabricatorStartup::endOutputCapture();
+   //var_dump($unexpected_output);
     if ($unexpected_output) {
       $unexpected_output = pht(
         "Unexpected output:\n\n%s",
@@ -478,7 +480,7 @@
 
     // NOTE: We only do this for GET, since redirects switch to GET and drop
     // data like POST parameters.
-    if (!preg_match('@/$@', $path) && $request->isHTTPGet()) {
+    if (!@preg_match('@/$@', $path) && $request->isHTTPGet()) {
       $result = $this->routePath($maps, $path.'/');
       if ($result) {
         $target_uri = $request->getAbsoluteRequestURI();
@@ -823,9 +825,9 @@
     $raw_input = PhabricatorStartup::getRawInput();
     $parser = new PhutilQueryStringParser();
 
-    if (strlen($raw_input)) {
+    if (@strlen($raw_input)) {
       $content_type = idx($_SERVER, 'CONTENT_TYPE');
-      $is_multipart = preg_match('@^multipart/form-data@i', $content_type);
+      $is_multipart = @preg_match('@^multipart/form-data@i', $content_type);
       if ($is_multipart) {
         $multipart_parser = id(new AphrontMultipartParser())
           ->setContentType($content_type);
diff --git a/src/aphront/headerparser/AphrontHTTPHeaderParser.php b/src/aphront/headerparser/AphrontHTTPHeaderParser.php
--- a/src/aphront/headerparser/AphrontHTTPHeaderParser.php
+++ b/src/aphront/headerparser/AphrontHTTPHeaderParser.php
@@ -10,7 +10,7 @@
     $this->name = null;
     $this->content = null;
 
-    $parts = explode(':', $raw_header, 2);
+    $parts = @explode(':', $raw_header, 2);
     $this->name = trim($parts[0]);
     if (count($parts) > 1) {
       $this->content = trim($parts[1]);
@@ -36,7 +36,7 @@
 
 
     $state = 'prekey';
-    $length = strlen($content);
+    $length = @strlen($content);
 
     $pair_name = null;
     $pair_value = null;
diff --git a/src/aphront/multipartparser/AphrontMultipartParser.php b/src/aphront/multipartparser/AphrontMultipartParser.php
--- a/src/aphront/multipartparser/AphrontMultipartParser.php
+++ b/src/aphront/multipartparser/AphrontMultipartParser.php
@@ -27,7 +27,7 @@
       throw new PhutilInvalidStateException('setContentType');
     }
 
-    if (!preg_match('(^multipart/form-data)', $content_type)) {
+    if (!@preg_match('(^multipart/form-data)', $content_type)) {
       throw new Exception(
         pht(
           'Expected "multipart/form-data" content type when executing a '.
@@ -38,7 +38,7 @@
     $boundary = null;
     foreach ($type_parts as $type_part) {
       $matches = null;
-      if (preg_match('(^boundary=(.*))', $type_part, $matches)) {
+      if (@preg_match('(^boundary=(.*))', $type_part, $matches)) {
         $boundary = $matches[1];
         break;
       }
@@ -70,7 +70,7 @@
           // indicates we've reached the end of the parts) or "\r\n" (which
           // indicates we should read the headers for the next part).
 
-          if (strlen($this->buffer) < 2) {
+          if (@strlen($this->buffer) < 2) {
             // We don't have enough bytes yet, so wait for more.
             $continue = false;
             break;
@@ -79,7 +79,7 @@
           if (!strncmp($this->buffer, '--', 2)) {
             // This is "--" after a boundary, so we're done. We'll read the
             // rest of the body (the "epilogue") and discard it.
-            $this->buffer = substr($this->buffer, 2);
+            $this->buffer = @substr($this->buffer, 2);
             $this->state = 'epilogue';
 
             $this->part = null;
@@ -89,7 +89,7 @@
           if (!strncmp($this->buffer, "\r\n", 2)) {
             // This is "\r\n" after a boundary, so we're going to going to
             // read the headers for a part.
-            $this->buffer = substr($this->buffer, 2);
+            $this->buffer = @substr($this->buffer, 2);
             $this->state = 'header';
 
             // Create the object to hold the part we're about to read.
@@ -107,7 +107,7 @@
           // headers and terminated by "\r\n". The section is terminated by
           // a line with no header on it.
 
-          if (strlen($this->buffer) < 2) {
+          if (@strlen($this->buffer) < 2) {
             // We don't have enough data to find a "\r\n", so wait for more.
             $continue = false;
             break;
@@ -116,23 +116,23 @@
           if (!strncmp("\r\n", $this->buffer, 2)) {
             // This line immediately began "\r\n", so we're done with parsing
             // headers. Start parsing the body.
-            $this->buffer = substr($this->buffer, 2);
+            $this->buffer = @substr($this->buffer, 2);
             $this->state = 'body';
             break;
           }
 
           // This is an actual header, so look for the end of it.
-          $header_len = strpos($this->buffer, "\r\n");
+          $header_len = @strpos($this->buffer, "\r\n");
           if ($header_len === false) {
             // We don't have a full header yet, so wait for more data.
             $continue = false;
             break;
           }
 
-          $header_buf = substr($this->buffer, 0, $header_len);
+          $header_buf = @substr($this->buffer, 0, $header_len);
           $this->part->appendRawHeader($header_buf);
 
-          $this->buffer = substr($this->buffer, $header_len + 2);
+          $this->buffer = @substr($this->buffer, $header_len + 2);
           break;
         case 'body':
           // We've parsed a boundary and headers, and are parsing the data for
@@ -142,7 +142,7 @@
           // we find it.
 
           $marker = "\r";
-          $marker_pos = strpos($this->buffer, $marker);
+          $marker_pos = @strpos($this->buffer, $marker);
 
           if ($marker_pos === false) {
             // There's no "\r" anywhere in the buffer, so we can just read it
@@ -162,14 +162,14 @@
           if ($marker_pos > 0) {
             // If there are bytes before the "\r",
             if ($this->part) {
-              $this->part->appendData(substr($this->buffer, 0, $marker_pos));
+              $this->part->appendData(@substr($this->buffer, 0, $marker_pos));
             }
-            $this->buffer = substr($this->buffer, $marker_pos);
+            $this->buffer = @substr($this->buffer, $marker_pos);
           }
 
           $expect = "\r\n";
-          $expect_len = strlen($expect);
-          if (strlen($this->buffer) < $expect_len) {
+          $expect_len = @strlen($expect);
+          if (@strlen($this->buffer) < $expect_len) {
             // We don't have enough bytes yet to know if this is "\r\n"
             // or not.
             $continue = false;
@@ -180,14 +180,14 @@
             // The next two bytes aren't "\r\n", so eat them and go looking
             // for more newlines.
             if ($this->part) {
-              $this->part->appendData(substr($this->buffer, 0, $expect_len));
+              $this->part->appendData(@substr($this->buffer, 0, $expect_len));
             }
-            $this->buffer = substr($this->buffer, $expect_len);
+            $this->buffer = @substr($this->buffer, $expect_len);
             break;
           }
 
           // Eat the "\r\n".
-          $this->buffer = substr($this->buffer, $expect_len);
+          $this->buffer = @substr($this->buffer, $expect_len);
           $this->state = 'bodynewline';
           break;
         case 'bodynewline':
@@ -197,9 +197,9 @@
           // bytes and move on.
 
           $expect = '--'.$this->boundary;
-          $expect_len = strlen($expect);
+          $expect_len = @strlen($expect);
 
-          if (strlen($this->buffer) < $expect_len) {
+          if (@strlen($this->buffer) < $expect_len) {
             // We don't have enough bytes yet, so wait for more.
             $continue = false;
             break;
@@ -217,7 +217,7 @@
           }
 
           // This is the boundary, so toss it and move on.
-          $this->buffer = substr($this->buffer, $expect_len);
+          $this->buffer = @substr($this->buffer, $expect_len);
           $this->state = 'endboundary';
           break;
         case 'epilogue':
diff --git a/src/aphront/multipartparser/AphrontMultipartPart.php b/src/aphront/multipartparser/AphrontMultipartPart.php
--- a/src/aphront/multipartparser/AphrontMultipartPart.php
+++ b/src/aphront/multipartparser/AphrontMultipartPart.php
@@ -21,7 +21,7 @@
       $parser->getHeaderContent(),
     );
 
-    if (strtolower($header_name) === 'content-disposition') {
+    if (@strtolower($header_name) === 'content-disposition') {
       $pairs = $parser->getHeaderContentAsPairs();
       foreach ($pairs as $pair) {
         list($key, $value) = $pair;
@@ -40,7 +40,7 @@
   }
 
   public function appendData($bytes) {
-    $this->byteSize += strlen($bytes);
+    $this->byteSize += @strlen($bytes);
 
     if ($this->isVariable()) {
       $this->value .= $bytes;
@@ -78,7 +78,7 @@
     $mime_type = 'application/octet-stream';
     foreach ($this->headers as $header) {
       list($name, $value) = $header;
-      if (strtolower($name) == 'content-type') {
+      if (@strtolower($name) == 'content-type') {
         $mime_type = $value;
         break;
       }
diff --git a/src/aphront/requeststream/AphrontRequestStream.php b/src/aphront/requeststream/AphrontRequestStream.php
--- a/src/aphront/requeststream/AphrontRequestStream.php
+++ b/src/aphront/requeststream/AphrontRequestStream.php
@@ -101,7 +101,7 @@
 
     $filters = stream_get_filters();
     foreach ($filters as $filter) {
-      if (!strncasecmp($filter, 'zlib.', strlen('zlib.'))) {
+      if (!strncasecmp($filter, 'zlib.', @strlen('zlib.'))) {
         $has_zlib = true;
         break;
       }
diff --git a/src/aphront/response/AphrontAjaxResponse.php b/src/aphront/response/AphrontAjaxResponse.php
--- a/src/aphront/response/AphrontAjaxResponse.php
+++ b/src/aphront/response/AphrontAjaxResponse.php
@@ -64,7 +64,7 @@
       if ($viewer) {
         $postprocessor_key = $viewer->getUserSetting(
           PhabricatorAccessibilitySetting::SETTINGKEY);
-        if (strlen($postprocessor_key)) {
+        if (@strlen($postprocessor_key)) {
           $response->setPostprocessorKey($postprocessor_key);
         }
       }
diff --git a/src/aphront/response/AphrontFileResponse.php b/src/aphront/response/AphrontFileResponse.php
--- a/src/aphront/response/AphrontFileResponse.php
+++ b/src/aphront/response/AphrontFileResponse.php
@@ -19,7 +19,7 @@
   }
 
   public function setDownload($download) {
-    if (!strlen($download)) {
+    if (!@strlen($download)) {
       $download = 'untitled';
     }
     $this->download = $download;
@@ -40,7 +40,7 @@
   }
 
   public function setContent($content) {
-    $this->setContentLength(strlen($content));
+    $this->setContentLength(@strlen($content));
     $this->content = $content;
     return $this;
   }
@@ -113,7 +113,7 @@
       $headers[] = array('Content-Length', $content_len);
     }
 
-    if (strlen($this->getDownload())) {
+    if (@strlen($this->getDownload())) {
       $headers[] = array('X-Download-Options', 'noopen');
 
       $filename = $this->getDownload();
@@ -144,13 +144,13 @@
     $end = null;
 
     $matches = null;
-    if (preg_match('/^bytes=(\d+)-(\d*)$/', $range, $matches)) {
+    if (@preg_match('/^bytes=(\d+)-(\d*)$/', $range, $matches)) {
       // Note that the "Range" header specifies bytes differently than
       // we do internally: the range 0-1 has 2 bytes (byte 0 and byte 1).
       $begin = (int)$matches[1];
 
       // The "Range" may be "200-299" or "200-", meaning "until end of file".
-      if (strlen($matches[2])) {
+      if (@strlen($matches[2])) {
         $range_end = (int)$matches[2];
         $end = $range_end + 1;
       } else {
diff --git a/src/aphront/response/AphrontRedirectResponse.php b/src/aphront/response/AphrontRedirectResponse.php
--- a/src/aphront/response/AphrontRedirectResponse.php
+++ b/src/aphront/response/AphrontRedirectResponse.php
@@ -127,7 +127,7 @@
       // If this is a remote resource it must have a domain set. This
       // would also be caught below, but testing for it explicitly first allows
       // us to raise a better error message.
-      if (!strlen($uri_object->getDomain())) {
+      if (!@strlen($uri_object->getDomain())) {
         throw new Exception(
           pht(
             'Refusing to redirect to external URI "%s". This URI '.
@@ -147,7 +147,7 @@
     } else {
       // If this is a local resource, it must not have a domain set. This allows
       // us to raise a better error message than the check below can.
-      if (strlen($uri_object->getDomain())) {
+      if (@strlen($uri_object->getDomain())) {
         throw new Exception(
           pht(
             'Refusing to redirect to local resource "%s". The URI has a '.
diff --git a/src/aphront/response/AphrontResponse.php b/src/aphront/response/AphrontResponse.php
--- a/src/aphront/response/AphrontResponse.php
+++ b/src/aphront/response/AphrontResponse.php
@@ -230,7 +230,7 @@
       ->removeAllQueryParams();
 
     $uri = (string)$uri;
-    if (preg_match('/[ ;\']/', $uri)) {
+    if (@preg_match('/[ ;\']/', $uri)) {
       throw new Exception(
         pht(
           'Attempting to emit a response with an unsafe source ("%s") in the '.
diff --git a/src/aphront/response/AphrontWebpageResponse.php b/src/aphront/response/AphrontWebpageResponse.php
--- a/src/aphront/response/AphrontWebpageResponse.php
+++ b/src/aphront/response/AphrontWebpageResponse.php
@@ -21,7 +21,7 @@
 
   public function buildResponseString() {
     $unexpected_output = $this->getUnexpectedOutput();
-    if (strlen($unexpected_output)) {
+    if (@strlen($unexpected_output)) {
       $style = array(
         'background: linear-gradient(180deg, #eeddff, #ddbbff);',
         'white-space: pre-wrap;',
diff --git a/src/aphront/sink/AphrontHTTPSink.php b/src/aphront/sink/AphrontHTTPSink.php
--- a/src/aphront/sink/AphrontHTTPSink.php
+++ b/src/aphront/sink/AphrontHTTPSink.php
@@ -32,7 +32,7 @@
    * @return void
    */
   final public function writeHTTPStatus($code, $message = '') {
-    if (!preg_match('/^\d{3}$/', $code)) {
+    if (!@preg_match('/^\d{3}$/', $code)) {
       throw new Exception(pht("Malformed HTTP status code '%s'!", $code));
     }
 
@@ -54,7 +54,7 @@
       }
       list($name, $value) = $header;
 
-      if (strpos($name, ':') !== false) {
+      if (@strpos($name, ':') !== false) {
         throw new Exception(
           pht(
             'Declining to emit response with malformed HTTP header name: %s',
@@ -71,7 +71,7 @@
       //
       //   http://news.php.net/php.internals/57655
 
-      if (preg_match('/[\r\n\0]/', $name.$value)) {
+      if (@preg_match('/[\r\n\0]/', $name.$value)) {
         throw new Exception(
           pht(
             'Declining to emit response with unsafe HTTP header: %s',
diff --git a/src/aphront/sink/AphrontPHPHTTPSink.php b/src/aphront/sink/AphrontPHPHTTPSink.php
--- a/src/aphront/sink/AphrontPHPHTTPSink.php
+++ b/src/aphront/sink/AphrontPHPHTTPSink.php
@@ -8,7 +8,7 @@
   protected function emitHTTPStatus($code, $message = '') {
     if ($code != 200) {
       $header = "HTTP/1.0 {$code}";
-      if (strlen($message)) {
+      if (@strlen($message)) {
         $header .= " {$message}";
       }
       header($header);
diff --git a/src/aphront/site/AphrontRoutingMap.php b/src/aphront/site/AphrontRoutingMap.php
--- a/src/aphront/site/AphrontRoutingMap.php
+++ b/src/aphront/site/AphrontRoutingMap.php
@@ -102,7 +102,7 @@
     }
 
     $data = null;
-    $ok = preg_match($pattern, $path, $data);
+    $ok = @preg_match($pattern, $path, $data);
     if ($ok === false) {
       throw new Exception(
         pht(
@@ -131,7 +131,7 @@
       );
     }
 
-    $sub_path = substr($path, strlen($path_match));
+    $sub_path = @substr($path, @strlen($path_match));
     foreach ($value as $sub_route => $sub_value) {
       $result = $this->tryRoute($sub_route, $sub_value, $sub_path);
       if ($result) {
diff --git a/src/aphront/site/AphrontSite.php b/src/aphront/site/AphrontSite.php
--- a/src/aphront/site/AphrontSite.php
+++ b/src/aphront/site/AphrontSite.php
@@ -15,7 +15,7 @@
 
   protected function isHostMatch($host, array $uris) {
     foreach ($uris as $uri) {
-      if (!strlen($uri)) {
+      if (!@strlen($uri)) {
         continue;
       }
 
diff --git a/src/aphront/site/PhabricatorPlatformSite.php b/src/aphront/site/PhabricatorPlatformSite.php
--- a/src/aphront/site/PhabricatorPlatformSite.php
+++ b/src/aphront/site/PhabricatorPlatformSite.php
@@ -14,7 +14,7 @@
     // If no base URI has been configured yet, match this site so the user
     // can follow setup instructions.
     $base_uri = PhabricatorEnv::getEnvConfig('phabricator.base-uri');
-    if (!strlen($base_uri)) {
+    if (!@strlen($base_uri)) {
       return new PhabricatorPlatformSite();
     }
 
diff --git a/src/aphront/site/PhabricatorResourceSite.php b/src/aphront/site/PhabricatorResourceSite.php
--- a/src/aphront/site/PhabricatorResourceSite.php
+++ b/src/aphront/site/PhabricatorResourceSite.php
@@ -14,7 +14,7 @@
     $host = $request->getHost();
 
     $uri = PhabricatorEnv::getEnvConfig('security.alternate-file-domain');
-    if (!strlen($uri)) {
+    if (!@strlen($uri)) {
       return null;
     }
 
diff --git a/src/aphront/site/PhabricatorShortSite.php b/src/aphront/site/PhabricatorShortSite.php
--- a/src/aphront/site/PhabricatorShortSite.php
+++ b/src/aphront/site/PhabricatorShortSite.php
@@ -14,7 +14,7 @@
     $host = $request->getHost();
 
     $uri = PhabricatorEnv::getEnvConfig('phurl.short-uri');
-    if (!strlen($uri)) {
+    if (!@strlen($uri)) {
       return null;
     }
 
diff --git a/src/applications/almanac/controller/AlmanacPropertyDeleteController.php b/src/applications/almanac/controller/AlmanacPropertyDeleteController.php
--- a/src/applications/almanac/controller/AlmanacPropertyDeleteController.php
+++ b/src/applications/almanac/controller/AlmanacPropertyDeleteController.php
@@ -14,7 +14,7 @@
     $object = $this->getPropertyObject();
 
     $key = $request->getStr('key');
-    if (!strlen($key)) {
+    if (!@strlen($key)) {
       return new Aphront404Response();
     }
 
diff --git a/src/applications/almanac/controller/AlmanacPropertyEditController.php b/src/applications/almanac/controller/AlmanacPropertyEditController.php
--- a/src/applications/almanac/controller/AlmanacPropertyEditController.php
+++ b/src/applications/almanac/controller/AlmanacPropertyEditController.php
@@ -16,7 +16,7 @@
     $cancel_uri = $object->getURI();
     $property_key = $request->getStr('key');
 
-    if (!strlen($property_key)) {
+    if (!@strlen($property_key)) {
       return $this->buildPropertyKeyResponse($cancel_uri, null);
     } else {
       $error = null;
diff --git a/src/applications/almanac/management/AlmanacManagementRegisterWorkflow.php b/src/applications/almanac/management/AlmanacManagementRegisterWorkflow.php
--- a/src/applications/almanac/management/AlmanacManagementRegisterWorkflow.php
+++ b/src/applications/almanac/management/AlmanacManagementRegisterWorkflow.php
@@ -38,7 +38,7 @@
     $viewer = $this->getViewer();
 
     $device_name = $args->getArg('device');
-    if (!strlen($device_name)) {
+    if (!@strlen($device_name)) {
       throw new PhutilArgumentUsageException(
         pht('Specify a device with --device.'));
     }
@@ -55,7 +55,7 @@
     $identify_as = $args->getArg('identify-as');
 
     $raw_device = $device_name;
-    if (strlen($identify_as)) {
+    if (@strlen($identify_as)) {
       $raw_device = $identify_as;
     }
 
@@ -70,7 +70,7 @@
     }
 
     $private_key_path = $args->getArg('private-key');
-    if (!strlen($private_key_path)) {
+    if (!@strlen($private_key_path)) {
       throw new PhutilArgumentUsageException(
         pht('Specify a private key with --private-key.'));
     }
diff --git a/src/applications/almanac/storage/AlmanacNamespace.php b/src/applications/almanac/storage/AlmanacNamespace.php
--- a/src/applications/almanac/storage/AlmanacNamespace.php
+++ b/src/applications/almanac/storage/AlmanacNamespace.php
@@ -59,7 +59,7 @@
   }
 
   public function getNameLength() {
-    return strlen($this->getName());
+    return @strlen($this->getName());
   }
 
   /**
@@ -72,7 +72,7 @@
     // For a name like "x.y.z", produce a list of controlling namespaces like
     // ("z", "y.x", "x.y.z").
     $names = array();
-    $parts = explode('.', $name);
+    $parts = @explode('.', $name);
     for ($ii = 0; $ii < count($parts); $ii++) {
       $names[] = implode('.', array_slice($parts, -($ii + 1)));
     }
diff --git a/src/applications/almanac/util/AlmanacKeys.php b/src/applications/almanac/util/AlmanacKeys.php
--- a/src/applications/almanac/util/AlmanacKeys.php
+++ b/src/applications/almanac/util/AlmanacKeys.php
@@ -58,7 +58,7 @@
 
   public static function getClusterSSHUser() {
     $username = PhabricatorEnv::getEnvConfig('diffusion.ssh-user');
-    if (strlen($username)) {
+    if (@strlen($username)) {
       return $username;
     }
 
diff --git a/src/applications/almanac/util/AlmanacNames.php b/src/applications/almanac/util/AlmanacNames.php
--- a/src/applications/almanac/util/AlmanacNames.php
+++ b/src/applications/almanac/util/AlmanacNames.php
@@ -3,21 +3,21 @@
 final class AlmanacNames extends Phobject {
 
   public static function validateName($name) {
-    if (strlen($name) < 3) {
+    if (@strlen($name) < 3) {
       throw new Exception(
         pht(
           'Almanac service, device, property, network and namespace names '.
           'must be at least 3 characters long.'));
     }
 
-    if (strlen($name) > 100) {
+    if (@strlen($name) > 100) {
       throw new Exception(
         pht(
           'Almanac service, device, property, network and namespace names '.
           'may not be more than 100 characters long.'));
     }
 
-    if (!preg_match('/^[a-z0-9.-]+\z/', $name)) {
+    if (!@preg_match('/^[a-z0-9.-]+\z/', $name)) {
       throw new Exception(
         pht(
           'Almanac service, device, property, network and namespace names '.
@@ -25,35 +25,35 @@
           'periods.'));
     }
 
-    if (preg_match('/(^|\\.)\d+(\z|\\.)/', $name)) {
+    if (@preg_match('/(^|\\.)\d+(\z|\\.)/', $name)) {
       throw new Exception(
         pht(
           'Almanac service, device, network, property and namespace names '.
           'may not have any segments containing only digits.'));
     }
 
-    if (preg_match('/\.\./', $name)) {
+    if (@preg_match('/\.\./', $name)) {
       throw new Exception(
         pht(
           'Almanac service, device, property, network and namespace names '.
           'may not contain multiple consecutive periods.'));
     }
 
-    if (preg_match('/\\.-|-\\./', $name)) {
+    if (@preg_match('/\\.-|-\\./', $name)) {
       throw new Exception(
         pht(
           'Almanac service, device, property, network and namespace names '.
           'may not contain hyphens adjacent to periods.'));
     }
 
-    if (preg_match('/--/', $name)) {
+    if (@preg_match('/--/', $name)) {
       throw new Exception(
         pht(
           'Almanac service, device, property, network and namespace names '.
           'may not contain multiple consecutive hyphens.'));
     }
 
-    if (!preg_match('/^[a-z0-9].*[a-z0-9]\z/', $name)) {
+    if (!@preg_match('/^[a-z0-9].*[a-z0-9]\z/', $name)) {
       throw new Exception(
         pht(
           'Almanac service, device, property, network and namespace names '.
diff --git a/src/applications/aphlict/management/PhabricatorAphlictManagementNotifyWorkflow.php b/src/applications/aphlict/management/PhabricatorAphlictManagementNotifyWorkflow.php
--- a/src/applications/aphlict/management/PhabricatorAphlictManagementNotifyWorkflow.php
+++ b/src/applications/aphlict/management/PhabricatorAphlictManagementNotifyWorkflow.php
@@ -26,7 +26,7 @@
     $viewer = $this->getViewer();
 
     $username = $args->getArg('user');
-    if (!strlen($username)) {
+    if (!@strlen($username)) {
       throw new PhutilArgumentUsageException(
         pht(
           'Specify a user to notify with "--user".'));
@@ -45,7 +45,7 @@
     }
 
     $message = $args->getArg('message');
-    if (!strlen($message)) {
+    if (!@strlen($message)) {
       throw new PhutilArgumentUsageException(
         pht(
           'Specify a message to send with "--message".'));
diff --git a/src/applications/audit/management/PhabricatorAuditManagementDeleteWorkflow.php b/src/applications/audit/management/PhabricatorAuditManagementDeleteWorkflow.php
--- a/src/applications/audit/management/PhabricatorAuditManagementDeleteWorkflow.php
+++ b/src/applications/audit/management/PhabricatorAuditManagementDeleteWorkflow.php
@@ -257,7 +257,7 @@
     }
 
     foreach ($list as $key => $item) {
-      if (!strlen($item)) {
+      if (!@strlen($item)) {
         unset($list[$key]);
       }
     }
diff --git a/src/applications/auth/adapter/PhutilBitbucketAuthAdapter.php b/src/applications/auth/adapter/PhutilBitbucketAuthAdapter.php
--- a/src/applications/auth/adapter/PhutilBitbucketAuthAdapter.php
+++ b/src/applications/auth/adapter/PhutilBitbucketAuthAdapter.php
@@ -14,7 +14,7 @@
 
   public function getAccountURI() {
     $name = $this->getAccountID();
-    if (strlen($name)) {
+    if (@strlen($name)) {
       return 'https://bitbucket.org/'.$name;
     }
     return null;
diff --git a/src/applications/auth/adapter/PhutilFacebookAuthAdapter.php b/src/applications/auth/adapter/PhutilFacebookAuthAdapter.php
--- a/src/applications/auth/adapter/PhutilFacebookAuthAdapter.php
+++ b/src/applications/auth/adapter/PhutilFacebookAuthAdapter.php
@@ -28,7 +28,7 @@
     }
 
     $matches = null;
-    if (!preg_match('@/([^/]+)$@', $link, $matches)) {
+    if (!@preg_match('@/([^/]+)$@', $link, $matches)) {
       return null;
     }
 
diff --git a/src/applications/auth/adapter/PhutilGitHubAuthAdapter.php b/src/applications/auth/adapter/PhutilGitHubAuthAdapter.php
--- a/src/applications/auth/adapter/PhutilGitHubAuthAdapter.php
+++ b/src/applications/auth/adapter/PhutilGitHubAuthAdapter.php
@@ -31,7 +31,7 @@
 
   public function getAccountURI() {
     $name = $this->getAccountName();
-    if (strlen($name)) {
+    if (@strlen($name)) {
       return 'https://github.com/'.$name;
     }
     return null;
diff --git a/src/applications/auth/adapter/PhutilGoogleAuthAdapter.php b/src/applications/auth/adapter/PhutilGoogleAuthAdapter.php
--- a/src/applications/auth/adapter/PhutilGoogleAuthAdapter.php
+++ b/src/applications/auth/adapter/PhutilGoogleAuthAdapter.php
@@ -39,7 +39,7 @@
   public function getAccountName() {
     // Guess account name from email address, this is just a hint anyway.
     $email = $this->getAccountEmail();
-    $email = explode('@', $email);
+    $email = @explode('@', $email);
     $email = head($email);
     return $email;
   }
diff --git a/src/applications/auth/adapter/PhutilLDAPAuthAdapter.php b/src/applications/auth/adapter/PhutilLDAPAuthAdapter.php
--- a/src/applications/auth/adapter/PhutilLDAPAuthAdapter.php
+++ b/src/applications/auth/adapter/PhutilLDAPAuthAdapter.php
@@ -128,7 +128,7 @@
 
   public function readLDAPRecordAccountID(array $record) {
     $key = $this->usernameAttribute;
-    if (!strlen($key)) {
+    if (!@strlen($key)) {
       $key = head($this->searchAttributes);
     }
     return $this->readLDAPData($record, $key);
@@ -182,7 +182,7 @@
     //
     // However, in at least the case of 'dn', the property is a bare string.
 
-    if (is_scalar($list) && strlen($list)) {
+    if (is_scalar($list) && @strlen($list)) {
       return $list;
     } else if (is_array($list)) {
       return $list[0];
@@ -195,7 +195,7 @@
     // If the attribute contains the literal token "${login}", treat it as a
     // query and substitute the user's login name for the token.
 
-    if (strpos($attribute, '${login}') !== false) {
+    if (@strpos($attribute, '${login}') !== false) {
       $escaped_user = ldap_sprintf('%S', $login_user);
       $attribute = str_replace('${login}', $escaped_user, $attribute);
       return $attribute;
@@ -466,7 +466,7 @@
 
     // NOTE: ldap_bind() dumps cleartext passwords into logs by default. Keep
     // it quiet.
-    if (strlen($user)) {
+    if (@strlen($user)) {
       $ok = @ldap_bind($conn, $user, $pass->openEnvelope());
     } else {
       $ok = @ldap_bind($conn);
@@ -475,7 +475,7 @@
     $profiler->endServiceCall($call_id, array());
 
     if (!$ok) {
-      if (strlen($user)) {
+      if (@strlen($user)) {
         $this->raiseConnectionException(
           $conn,
           pht('Failed to bind to LDAP server (as user "%s").', $user));
@@ -499,7 +499,7 @@
    * @return bool True if the adapter should perform binds without identity.
    */
   private function shouldBindWithoutIdentity() {
-    return $this->alwaysSearch || strlen($this->anonymousUsername);
+    return $this->alwaysSearch || @strlen($this->anonymousUsername);
   }
 
 }
diff --git a/src/applications/auth/adapter/PhutilOAuth1AuthAdapter.php b/src/applications/auth/adapter/PhutilOAuth1AuthAdapter.php
--- a/src/applications/auth/adapter/PhutilOAuth1AuthAdapter.php
+++ b/src/applications/auth/adapter/PhutilOAuth1AuthAdapter.php
@@ -104,7 +104,7 @@
       ->setSignatureMethod($this->getSignatureMethod());
 
     $consumer_key = $this->getConsumerKey();
-    if (strlen($consumer_key)) {
+    if (@strlen($consumer_key)) {
       $future->setConsumerKey($consumer_key);
     } else {
       throw new Exception(
@@ -118,11 +118,11 @@
       $future->setConsumerSecret($consumer_secret);
     }
 
-    if (strlen($this->getToken())) {
+    if (@strlen($this->getToken())) {
       $future->setToken($this->getToken());
     }
 
-    if (strlen($this->getTokenSecret())) {
+    if (@strlen($this->getTokenSecret())) {
       $future->setTokenSecret($this->getTokenSecret());
     }
 
@@ -137,7 +137,7 @@
     $request_token_uri = $this->getRequestTokenURI();
 
     $future = $this->newOAuth1Future($request_token_uri);
-    if (strlen($this->getCallbackURI())) {
+    if (@strlen($this->getCallbackURI())) {
       $future->setCallbackURI($this->getCallbackURI());
     }
 
diff --git a/src/applications/auth/adapter/PhutilOAuthAuthAdapter.php b/src/applications/auth/adapter/PhutilOAuthAuthAdapter.php
--- a/src/applications/auth/adapter/PhutilOAuthAuthAdapter.php
+++ b/src/applications/auth/adapter/PhutilOAuthAuthAdapter.php
@@ -35,7 +35,7 @@
   public function getAdapterType() {
     $this_class = get_class($this);
     $type_name = str_replace('PhutilAuthAdapterOAuth', '', $this_class);
-    return strtolower($type_name);
+    return @strtolower($type_name);
   }
 
   public function setState($state) {
diff --git a/src/applications/auth/adapter/PhutilTwitterAuthAdapter.php b/src/applications/auth/adapter/PhutilTwitterAuthAdapter.php
--- a/src/applications/auth/adapter/PhutilTwitterAuthAdapter.php
+++ b/src/applications/auth/adapter/PhutilTwitterAuthAdapter.php
@@ -17,7 +17,7 @@
 
   public function getAccountURI() {
     $name = $this->getAccountName();
-    if (strlen($name)) {
+    if (@strlen($name)) {
       return 'https://twitter.com/'.$name;
     }
     return null;
diff --git a/src/applications/auth/constants/PhabricatorCommonPasswords.php b/src/applications/auth/constants/PhabricatorCommonPasswords.php
--- a/src/applications/auth/constants/PhabricatorCommonPasswords.php
+++ b/src/applications/auth/constants/PhabricatorCommonPasswords.php
@@ -27,7 +27,7 @@
       $list = self::loadWordlist();
     }
 
-    return isset($list[strtolower($password)]);
+    return isset($list[@strtolower($password)]);
   }
 
 
@@ -48,10 +48,10 @@
     $map = array();
     foreach ($words as $key => $word) {
       // The wordlist file has some comments at the top, strip those out.
-      if (preg_match('/^#!comment:/', $word)) {
+      if (@preg_match('/^#!comment:/', $word)) {
         continue;
       }
-      $map[strtolower($word)] = true;
+      $map[@strtolower($word)] = true;
     }
 
     // Add in some application-specific passwords.
diff --git a/src/applications/auth/constants/PhabricatorCookies.php b/src/applications/auth/constants/PhabricatorCookies.php
--- a/src/applications/auth/constants/PhabricatorCookies.php
+++ b/src/applications/auth/constants/PhabricatorCookies.php
@@ -89,7 +89,7 @@
     // temporary and clearing it when users log out.
 
     $value = $request->getCookie(self::COOKIE_CLIENTID);
-    if (!strlen($value)) {
+    if (!@strlen($value)) {
       $request->setTemporaryCookie(
         self::COOKIE_CLIENTID,
         Filesystem::readRandomCharacters(16));
@@ -164,12 +164,12 @@
     // Old cookies look like: /uri
     // New cookies look like: timestamp,/uri
 
-    if (!strlen($cookie)) {
+    if (!@strlen($cookie)) {
       return null;
     }
 
-    if (strpos($cookie, ',') !== false) {
-      list($timestamp, $uri) = explode(',', $cookie, 2);
+    if (@strpos($cookie, ',') !== false) {
+      list($timestamp, $uri) = @explode(',', $cookie, 2);
       return array((int)$timestamp, $uri);
     }
 
diff --git a/src/applications/auth/controller/PhabricatorAuthController.php b/src/applications/auth/controller/PhabricatorAuthController.php
--- a/src/applications/auth/controller/PhabricatorAuthController.php
+++ b/src/applications/auth/controller/PhabricatorAuthController.php
@@ -278,7 +278,7 @@
       $viewer,
       PhabricatorAuthLoginMessageType::MESSAGEKEY);
 
-    if (!strlen($text)) {
+    if (!@strlen($text)) {
       return null;
     }
 
diff --git a/src/applications/auth/controller/PhabricatorAuthNeedsApprovalController.php b/src/applications/auth/controller/PhabricatorAuthNeedsApprovalController.php
--- a/src/applications/auth/controller/PhabricatorAuthNeedsApprovalController.php
+++ b/src/applications/auth/controller/PhabricatorAuthNeedsApprovalController.php
@@ -51,7 +51,7 @@
       $viewer,
       PhabricatorAuthWaitForApprovalMessageType::MESSAGEKEY);
 
-    if (!strlen($text)) {
+    if (!@strlen($text)) {
       return null;
     }
 
diff --git a/src/applications/auth/controller/PhabricatorAuthNeedsMultiFactorController.php b/src/applications/auth/controller/PhabricatorAuthNeedsMultiFactorController.php
--- a/src/applications/auth/controller/PhabricatorAuthNeedsMultiFactorController.php
+++ b/src/applications/auth/controller/PhabricatorAuthNeedsMultiFactorController.php
@@ -36,7 +36,7 @@
       ->getPanelKey();
 
     $panel_key = $request->getURIData('pageKey');
-    if (!strlen($panel_key)) {
+    if (!@strlen($panel_key)) {
       $panel_key = $multifactor_key;
     }
 
diff --git a/src/applications/auth/controller/PhabricatorAuthRegisterController.php b/src/applications/auth/controller/PhabricatorAuthRegisterController.php
--- a/src/applications/auth/controller/PhabricatorAuthRegisterController.php
+++ b/src/applications/auth/controller/PhabricatorAuthRegisterController.php
@@ -18,7 +18,7 @@
     $invite = $this->loadInvite();
 
     $is_setup = false;
-    if (strlen($account_key)) {
+    if (@strlen($account_key)) {
       $result = $this->loadAccountForRegistrationOrLinking($account_key);
       list($account, $provider, $response) = $result;
       $is_default = false;
@@ -243,9 +243,9 @@
 
     $require_real_name = PhabricatorEnv::getEnvConfig('user.require-real-name');
 
-    $e_username = strlen($value_username) ? null : true;
+    $e_username = @strlen($value_username) ? null : true;
     $e_realname = $require_real_name ? true : null;
-    $e_email = strlen($value_email) ? null : true;
+    $e_email = @strlen($value_email) ? null : true;
     $e_password = true;
     $e_captcha = true;
 
@@ -287,7 +287,7 @@
 
       if ($can_edit_username) {
         $value_username = $request->getStr('username');
-        if (!strlen($value_username)) {
+        if (!@strlen($value_username)) {
           $e_username = pht('Required');
           $errors[] = pht('Username is required.');
         } else if (!PhabricatorUser::validateUsername($value_username)) {
@@ -322,7 +322,7 @@
 
       if ($can_edit_email) {
         $value_email = $request->getStr('email');
-        if (!strlen($value_email)) {
+        if (!@strlen($value_email)) {
           $e_email = pht('Required');
           $errors[] = pht('Email is required.');
         } else if (!PhabricatorUserEmail::isValidAddress($value_email)) {
@@ -338,7 +338,7 @@
 
       if ($can_edit_realname) {
         $value_realname = $request->getStr('realName');
-        if (!strlen($value_realname) && $require_real_name) {
+        if (!@strlen($value_realname) && $require_real_name) {
           $e_realname = pht('Required');
           $errors[] = pht('Real name is required.');
         } else {
diff --git a/src/applications/auth/controller/PhabricatorAuthSSHKeyEditController.php b/src/applications/auth/controller/PhabricatorAuthSSHKeyEditController.php
--- a/src/applications/auth/controller/PhabricatorAuthSSHKeyEditController.php
+++ b/src/applications/auth/controller/PhabricatorAuthSSHKeyEditController.php
@@ -54,10 +54,10 @@
       $cancel_uri);
 
     $v_name = $key->getName();
-    $e_name = strlen($v_name) ? null : true;
+    $e_name = @strlen($v_name) ? null : true;
 
     $v_key = $key->getEntireKey();
-    $e_key = strlen($v_key) ? null : true;
+    $e_key = @strlen($v_key) ? null : true;
 
     $validation_exception = null;
     if ($request->isFormPost()) {
diff --git a/src/applications/auth/controller/PhabricatorAuthSetExternalController.php b/src/applications/auth/controller/PhabricatorAuthSetExternalController.php
--- a/src/applications/auth/controller/PhabricatorAuthSetExternalController.php
+++ b/src/applications/auth/controller/PhabricatorAuthSetExternalController.php
@@ -40,7 +40,7 @@
     $text = PhabricatorAuthMessage::loadMessageText(
       $viewer,
       PhabricatorAuthLinkMessageType::MESSAGEKEY);
-    if (!strlen($text)) {
+    if (!@strlen($text)) {
       $text = pht(
         'You can link your Phabricator account to an external account to '.
         'allow you to log in more easily in the future. To continue, choose '.
diff --git a/src/applications/auth/controller/PhabricatorAuthStartController.php b/src/applications/auth/controller/PhabricatorAuthStartController.php
--- a/src/applications/auth/controller/PhabricatorAuthStartController.php
+++ b/src/applications/auth/controller/PhabricatorAuthStartController.php
@@ -31,7 +31,7 @@
     $session_token = $request->getCookie(PhabricatorCookies::COOKIE_SESSION);
     $did_clear = $request->getStr('cleared');
 
-    if (strlen($session_token)) {
+    if (@strlen($session_token)) {
       $kind = PhabricatorAuthSessionEngine::getSessionKindFromToken(
         $session_token);
       switch ($kind) {
@@ -98,7 +98,7 @@
     }
 
     $next_uri = $request->getStr('next');
-    if (!strlen($next_uri)) {
+    if (!@strlen($next_uri)) {
       if ($this->getDelegatingController()) {
         // Only set a next URI from the request path if this controller was
         // delegated to, which happens when a user tries to view a page which
@@ -112,7 +112,7 @@
     }
 
     if (!$request->isFormPost()) {
-      if (strlen($next_uri)) {
+      if (@strlen($next_uri)) {
         PhabricatorCookies::setNextURICookie($request, $next_uri);
       }
       PhabricatorCookies::setClientIDCookie($request);
@@ -226,7 +226,7 @@
 
     $via_header = AphrontRequest::getViaHeaderName();
     $via_uri = AphrontRequest::getHTTPHeader($via_header);
-    if (strlen($via_uri)) {
+    if (@strlen($via_uri)) {
       PhabricatorCookies::setNextURICookie($request, $via_uri, $force = true);
     }
 
diff --git a/src/applications/auth/controller/PhabricatorAuthTerminateSessionController.php b/src/applications/auth/controller/PhabricatorAuthTerminateSessionController.php
--- a/src/applications/auth/controller/PhabricatorAuthTerminateSessionController.php
+++ b/src/applications/auth/controller/PhabricatorAuthTerminateSessionController.php
@@ -63,7 +63,7 @@
       $short = pht('Terminate Session');
       $body = pht(
         'Really terminate session %s?',
-        phutil_tag('strong', array(), substr($session->getSessionKey(), 0, 6)));
+        phutil_tag('strong', array(), @substr($session->getSessionKey(), 0, 6)));
     }
 
     return $this->newDialog()
diff --git a/src/applications/auth/controller/PhabricatorAuthValidateController.php b/src/applications/auth/controller/PhabricatorAuthValidateController.php
--- a/src/applications/auth/controller/PhabricatorAuthValidateController.php
+++ b/src/applications/auth/controller/PhabricatorAuthValidateController.php
@@ -20,7 +20,7 @@
 
     $failures = array();
 
-    if (!strlen($request->getStr('expect'))) {
+    if (!@strlen($request->getStr('expect'))) {
       return $this->renderErrors(
         array(
           pht(
diff --git a/src/applications/auth/controller/PhabricatorEmailLoginController.php b/src/applications/auth/controller/PhabricatorEmailLoginController.php
--- a/src/applications/auth/controller/PhabricatorEmailLoginController.php
+++ b/src/applications/auth/controller/PhabricatorEmailLoginController.php
@@ -43,7 +43,7 @@
         }
       }
 
-      if (!strlen($v_email)) {
+      if (!@strlen($v_email)) {
        $errors[] = pht('You must provide an email address.');
        $e_email = pht('Required');
       }
diff --git a/src/applications/auth/controller/PhabricatorLogoutController.php b/src/applications/auth/controller/PhabricatorLogoutController.php
--- a/src/applications/auth/controller/PhabricatorLogoutController.php
+++ b/src/applications/auth/controller/PhabricatorLogoutController.php
@@ -51,7 +51,7 @@
       // their cookies have some issues. We'll detect cookie issues when they
       // try to login again and tell them to clear any junk.
       $phsid = $request->getCookie(PhabricatorCookies::COOKIE_SESSION);
-      if (strlen($phsid)) {
+      if (@strlen($phsid)) {
         $session = id(new PhabricatorAuthSessionQuery())
           ->setViewer($viewer)
           ->withSessionKeys(array($phsid))
diff --git a/src/applications/auth/controller/config/PhabricatorAuthEditController.php b/src/applications/auth/controller/config/PhabricatorAuthEditController.php
--- a/src/applications/auth/controller/config/PhabricatorAuthEditController.php
+++ b/src/applications/auth/controller/config/PhabricatorAuthEditController.php
@@ -99,10 +99,10 @@
 
       if (!$errors) {
         if ($is_new) {
-          if (!strlen($config->getProviderType())) {
+          if (!@strlen($config->getProviderType())) {
             $config->setProviderType($provider->getProviderType());
           }
-          if (!strlen($config->getProviderDomain())) {
+          if (!@strlen($config->getProviderDomain())) {
             $config->setProviderDomain($provider->getProviderDomain());
           }
         }
diff --git a/src/applications/auth/controller/message/PhabricatorAuthMessageViewController.php b/src/applications/auth/controller/message/PhabricatorAuthMessageViewController.php
--- a/src/applications/auth/controller/message/PhabricatorAuthMessageViewController.php
+++ b/src/applications/auth/controller/message/PhabricatorAuthMessageViewController.php
@@ -103,7 +103,7 @@
       ->setViewer($viewer);
 
     $full_description = $message_type->getFullDescription();
-    if (strlen($full_description)) {
+    if (@strlen($full_description)) {
       $view->addTextContent(new PHUIRemarkupView($viewer, $full_description));
     } else {
       $short_description = $message_type->getShortDescription();
@@ -111,7 +111,7 @@
     }
 
     $message_text = $message->getMessageText();
-    if (strlen($message_text)) {
+    if (@strlen($message_text)) {
       $view->addSectionHeader(
         pht('Message Preview'),
         PHUIPropertyListView::ICON_SUMMARY);
@@ -120,7 +120,7 @@
     }
 
     $default_text = $message_type->getDefaultMessageText();
-    if (strlen($default_text)) {
+    if (@strlen($default_text)) {
       $view->addSectionHeader(
         pht('Default Message'),
         PHUIPropertyListView::ICON_SUMMARY);
diff --git a/src/applications/auth/controller/mfa/PhabricatorAuthFactorProviderViewController.php b/src/applications/auth/controller/mfa/PhabricatorAuthFactorProviderViewController.php
--- a/src/applications/auth/controller/mfa/PhabricatorAuthFactorProviderViewController.php
+++ b/src/applications/auth/controller/mfa/PhabricatorAuthFactorProviderViewController.php
@@ -83,7 +83,7 @@
 
 
     $custom_enroll = $provider->getEnrollMessage();
-    if (strlen($custom_enroll)) {
+    if (@strlen($custom_enroll)) {
       $view->addSectionHeader(
         pht('Custom Enroll Message'),
         PHUIPropertyListView::ICON_SUMMARY);
diff --git a/src/applications/auth/data/PhabricatorAuthInviteAction.php b/src/applications/auth/data/PhabricatorAuthInviteAction.php
--- a/src/applications/auth/data/PhabricatorAuthInviteAction.php
+++ b/src/applications/auth/data/PhabricatorAuthInviteAction.php
@@ -103,7 +103,7 @@
       $email = new PhutilEmailAddress($address);
       $result->emailAddress = phutil_utf8_strtolower($email->getAddress());
 
-      if (!preg_match('/^\S+@\S+\.\S+\z/', $result->emailAddress)) {
+      if (!@preg_match('/^\S+@\S+\.\S+\z/', $result->emailAddress)) {
         $result->issues[] = self::ISSUE_PARSE;
       }
 
@@ -194,7 +194,7 @@
       throw new Exception(pht('Invite action is not a send action!'));
     }
 
-    if (!preg_match('/{\$INVITE_URI}/', $template)) {
+    if (!@preg_match('/{\$INVITE_URI}/', $template)) {
       throw new Exception(pht('Invite template does not include invite URI!'));
     }
 
diff --git a/src/applications/auth/engine/PhabricatorAuthCSRFEngine.php b/src/applications/auth/engine/PhabricatorAuthCSRFEngine.php
--- a/src/applications/auth/engine/PhabricatorAuthCSRFEngine.php
+++ b/src/applications/auth/engine/PhabricatorAuthCSRFEngine.php
@@ -46,13 +46,13 @@
 
     // We expect a BREACH-mitigating token. See T3684.
     $breach_prefix = $this->getBREACHPrefix();
-    $breach_prelen = strlen($breach_prefix);
+    $breach_prelen = @strlen($breach_prefix);
     if (strncmp($token, $breach_prefix, $breach_prelen) !== 0) {
       return false;
     }
 
-    $salt = substr($token, $breach_prelen, $salt_length);
-    $token = substr($token, $breach_prelen + $salt_length);
+    $salt = @substr($token, $breach_prelen, $salt_length);
+    $token = @substr($token, $breach_prelen + $salt_length);
 
     foreach ($this->getWindowOffsets() as $offset) {
       $expect_token = $this->newRawToken($salt, $offset);
@@ -81,7 +81,7 @@
       $secret.$time_block.$salt,
       'csrf');
 
-    return substr($hash, 0, $this->getTokenLength());
+    return @substr($hash, 0, $this->getTokenLength());
   }
 
   private function getBREACHPrefix() {
diff --git a/src/applications/auth/engine/PhabricatorAuthPasswordEngine.php b/src/applications/auth/engine/PhabricatorAuthPasswordEngine.php
--- a/src/applications/auth/engine/PhabricatorAuthPasswordEngine.php
+++ b/src/applications/auth/engine/PhabricatorAuthPasswordEngine.php
@@ -61,7 +61,7 @@
 
     $raw_password = $password->openEnvelope();
 
-    if (!strlen($raw_password)) {
+    if (!@strlen($raw_password)) {
       if ($can_skip) {
         throw new PhabricatorAuthPasswordException(
           pht('You must choose a password or skip this step.'),
@@ -76,7 +76,7 @@
     $min_len = PhabricatorEnv::getEnvConfig('account.minimum-password-length');
     $min_len = (int)$min_len;
     if ($min_len) {
-      if (strlen($raw_password) < $min_len) {
+      if (@strlen($raw_password) < $min_len) {
         throw new PhabricatorAuthPasswordException(
           pht(
             'The selected password is too short. Passwords must be a minimum '.
@@ -88,7 +88,7 @@
 
     $raw_confirm = $confirm->openEnvelope();
 
-    if (!strlen($raw_confirm)) {
+    if (!@strlen($raw_confirm)) {
       throw new PhabricatorAuthPasswordException(
         pht('You must confirm the selected password.'),
         null,
@@ -164,7 +164,7 @@
     // Skip very short terms: it's okay if your password has the substring
     // "com" in it somewhere even if the install is on "mycompany.com".
     foreach ($terms_map as $term => $source) {
-      if (strlen($term) < $minimum_similarity) {
+      if (@strlen($term) < $minimum_similarity) {
         unset($terms_map[$term]);
       }
     }
@@ -179,7 +179,7 @@
     // Finally, make sure that none of the terms appear in the password,
     // and that the password does not appear in any of the terms.
     $normal_password = phutil_utf8_strtolower($raw_password);
-    if (strlen($normal_password) >= $minimum_similarity) {
+    if (@strlen($normal_password) >= $minimum_similarity) {
       foreach ($normal_map as $term => $source) {
 
         // See T2312. This may be required if the term list includes numeric
@@ -187,8 +187,8 @@
         // array keys.
         $term = phutil_string_cast($term);
 
-        if (strpos($term, $normal_password) === false &&
-            strpos($normal_password, $term) === false) {
+        if (@strpos($term, $normal_password) === false &&
+            @strpos($normal_password, $term) === false) {
           continue;
         }
 
diff --git a/src/applications/auth/engine/PhabricatorAuthSessionEngine.php b/src/applications/auth/engine/PhabricatorAuthSessionEngine.php
--- a/src/applications/auth/engine/PhabricatorAuthSessionEngine.php
+++ b/src/applications/auth/engine/PhabricatorAuthSessionEngine.php
@@ -79,12 +79,12 @@
    * @return  const   Session kind constant.
    */
   public static function getSessionKindFromToken($session_token) {
-    if (strpos($session_token, '/') === false) {
+    if (@strpos($session_token, '/') === false) {
       // Old-style session, these are all user sessions.
       return self::KIND_USER;
     }
 
-    list($kind, $key) = explode('/', $session_token, 2);
+    list($kind, $key) = @explode('/', $session_token, 2);
 
     switch ($kind) {
       case self::KIND_ANONYMOUS:
@@ -187,7 +187,7 @@
     foreach ($info as $key => $value) {
       if (strncmp($key, 's_', 2) === 0) {
         unset($info[$key]);
-        $session_dict[substr($key, 2)] = $value;
+        $session_dict[@substr($key, 2)] = $value;
         continue;
       }
 
diff --git a/src/applications/auth/factor/PhabricatorAuthFactor.php b/src/applications/auth/factor/PhabricatorAuthFactor.php
--- a/src/applications/auth/factor/PhabricatorAuthFactor.php
+++ b/src/applications/auth/factor/PhabricatorAuthFactor.php
@@ -414,7 +414,7 @@
     $sync_token = null;
 
     $sync_key = $request->getStr($this->getMFASyncTokenFormKey());
-    if (strlen($sync_key)) {
+    if (@strlen($sync_key)) {
       $sync_key_digest = PhabricatorHash::digestWithNamedKey(
         $sync_key,
         PhabricatorAuthMFASyncTemporaryTokenType::DIGEST_KEY);
@@ -546,7 +546,7 @@
     $rows = array();
     foreach ($lines as $line) {
       $cells = array();
-      for ($ii = 0; $ii < strlen($line); $ii++) {
+      for ($ii = 0; $ii < @strlen($line); $ii++) {
         if ($line[$ii] == '1') {
           $color = '#000';
         } else {
diff --git a/src/applications/auth/factor/PhabricatorDuoAuthFactor.php b/src/applications/auth/factor/PhabricatorDuoAuthFactor.php
--- a/src/applications/auth/factor/PhabricatorDuoAuthFactor.php
+++ b/src/applications/auth/factor/PhabricatorDuoAuthFactor.php
@@ -803,7 +803,7 @@
   }
 
   public static function requireDuoAPIHostname($hostname) {
-    if (preg_match('/\.duosecurity\.com\z/', $hostname)) {
+    if (@preg_match('/\.duosecurity\.com\z/', $hostname)) {
       return;
     }
 
diff --git a/src/applications/auth/factor/PhabricatorSMSAuthFactor.php b/src/applications/auth/factor/PhabricatorSMSAuthFactor.php
--- a/src/applications/auth/factor/PhabricatorSMSAuthFactor.php
+++ b/src/applications/auth/factor/PhabricatorSMSAuthFactor.php
@@ -157,7 +157,7 @@
 
         return $config;
       } else {
-        if (!strlen($code)) {
+        if (!@strlen($code)) {
           $e_code = pht('Required');
         } else {
           $e_code = pht('Invalid');
@@ -283,7 +283,7 @@
     PhabricatorAuthFactorConfig $config,
     AphrontRequest $request) {
     $value = $this->getChallengeResponseFromRequest($config, $request);
-    return (bool)strlen($value);
+    return (bool)@strlen($value);
   }
 
   protected function newResultFromChallengeResponse(
@@ -317,7 +317,7 @@
       return $result->setAnsweredChallenge($challenge);
     }
 
-    if (strlen($code)) {
+    if (@strlen($code)) {
       $error_message = pht('Invalid');
     } else {
       $error_message = pht('Required');
diff --git a/src/applications/auth/factor/PhabricatorTOTPAuthFactor.php b/src/applications/auth/factor/PhabricatorTOTPAuthFactor.php
--- a/src/applications/auth/factor/PhabricatorTOTPAuthFactor.php
+++ b/src/applications/auth/factor/PhabricatorTOTPAuthFactor.php
@@ -47,7 +47,7 @@
     PhabricatorAuthFactorProvider $provider,
     PhabricatorUser $viewer) {
 
-    $bits = strlen($config->getFactorSecret()) * 8;
+    $bits = @strlen($config->getFactorSecret()) * 8;
     return pht('%d-Bit Secret', $bits);
   }
 
@@ -81,7 +81,7 @@
 
         return $config;
       } else {
-        if (!strlen($code)) {
+        if (!@strlen($code)) {
           $e_code = pht('Required');
         } else {
           $e_code = pht('Invalid');
@@ -211,7 +211,7 @@
     AphrontRequest $request) {
 
     $value = $this->getChallengeResponseFromRequest($config, $request);
-    return (bool)strlen($value);
+    return (bool)@strlen($value);
   }
 
 
@@ -342,7 +342,7 @@
 
       $result->setAnsweredChallenge($challenge);
     } else {
-      if (strlen($code)) {
+      if (@strlen($code)) {
         $error_message = pht('Invalid');
       } else {
         $error_message = pht('Required');
@@ -365,7 +365,7 @@
     $map = array_flip($map);
 
     $out = '';
-    $len = strlen($buf);
+    $len = @strlen($buf);
     $acc = 0;
     $bits = 0;
     for ($ii = 0; $ii < $len; $ii++) {
diff --git a/src/applications/auth/management/PhabricatorAuthManagementCachePKCS8Workflow.php b/src/applications/auth/management/PhabricatorAuthManagementCachePKCS8Workflow.php
--- a/src/applications/auth/management/PhabricatorAuthManagementCachePKCS8Workflow.php
+++ b/src/applications/auth/management/PhabricatorAuthManagementCachePKCS8Workflow.php
@@ -32,7 +32,7 @@
     $console = PhutilConsole::getConsole();
 
     $public_keyfile = $args->getArg('public');
-    if (!strlen($public_keyfile)) {
+    if (!@strlen($public_keyfile)) {
       throw new PhutilArgumentUsageException(
         pht(
           'You must specify the path to a public keyfile with %s.',
@@ -49,7 +49,7 @@
     $public_key = Filesystem::readFile($public_keyfile);
 
     $pkcs8_keyfile = $args->getArg('pkcs8');
-    if (!strlen($pkcs8_keyfile)) {
+    if (!@strlen($pkcs8_keyfile)) {
       throw new PhutilArgumentUsageException(
         pht(
           'You must specify the path to a pkcs8 keyfile with %s.',
diff --git a/src/applications/auth/management/PhabricatorAuthManagementLDAPWorkflow.php b/src/applications/auth/management/PhabricatorAuthManagementLDAPWorkflow.php
--- a/src/applications/auth/management/PhabricatorAuthManagementLDAPWorkflow.php
+++ b/src/applications/auth/management/PhabricatorAuthManagementLDAPWorkflow.php
@@ -36,7 +36,7 @@
 
     $console->writeOut("%s\n", pht('Enter LDAP Credentials'));
     $username = phutil_console_prompt(pht('LDAP Username: '));
-    if (!strlen($username)) {
+    if (!@strlen($username)) {
       throw new PhutilArgumentUsageException(
         pht('You must enter an LDAP username.'));
     }
@@ -45,7 +45,7 @@
     $password = phutil_console_prompt(pht('LDAP Password: '));
     phutil_passthru('stty echo');
 
-    if (!strlen($password)) {
+    if (!@strlen($password)) {
       throw new PhutilArgumentUsageException(
         pht('You must enter an LDAP password.'));
     }
diff --git a/src/applications/auth/management/PhabricatorAuthManagementRefreshWorkflow.php b/src/applications/auth/management/PhabricatorAuthManagementRefreshWorkflow.php
--- a/src/applications/auth/management/PhabricatorAuthManagementRefreshWorkflow.php
+++ b/src/applications/auth/management/PhabricatorAuthManagementRefreshWorkflow.php
@@ -34,7 +34,7 @@
         ));
 
     $username = $args->getArg('user');
-    if (strlen($username)) {
+    if (@strlen($username)) {
       $user = id(new PhabricatorPeopleQuery())
         ->setViewer($viewer)
         ->withUsernames(array($username))
diff --git a/src/applications/auth/management/PhabricatorAuthManagementRevokeWorkflow.php b/src/applications/auth/management/PhabricatorAuthManagementRevokeWorkflow.php
--- a/src/applications/auth/management/PhabricatorAuthManagementRevokeWorkflow.php
+++ b/src/applications/auth/management/PhabricatorAuthManagementRevokeWorkflow.php
@@ -60,7 +60,7 @@
 
     $type = $args->getArg('type');
     $is_everything = $args->getArg('everything');
-    if (!strlen($type) && !$is_everything) {
+    if (!@strlen($type) && !$is_everything) {
       if ($is_list) {
         // By default, "bin/revoke --list" implies "--everything".
         $types = $all_types;
@@ -71,7 +71,7 @@
             '"--everything". Use "--list" to list available credential '.
             'types.'));
       }
-    } else if (strlen($type) && $is_everything) {
+    } else if (@strlen($type) && $is_everything) {
       throw new PhutilArgumentUsageException(
         pht(
           'Specify the credential type to revoke with "--type" or '.
@@ -94,7 +94,7 @@
     $from = $args->getArg('from');
 
     if ($is_list) {
-      if (strlen($from) || $is_everywhere) {
+      if (@strlen($from) || $is_everywhere) {
         throw new PhutilArgumentUsageException(
           pht(
             'You can not "--list" and revoke credentials (with "--from" or '.
@@ -119,12 +119,12 @@
     }
 
     $target = null;
-    if (!strlen($from) && !$is_everywhere) {
+    if (!@strlen($from) && !$is_everywhere) {
       throw new PhutilArgumentUsageException(
         pht(
           'Specify the target to revoke credentials from with "--from" or '.
           'specify "--everywhere".'));
-    } else if (strlen($from) && $is_everywhere) {
+    } else if (@strlen($from) && $is_everywhere) {
       throw new PhutilArgumentUsageException(
         pht(
           'Specify the target to revoke credentials from with "--from" or '.
diff --git a/src/applications/auth/management/PhabricatorAuthManagementUnlimitWorkflow.php b/src/applications/auth/management/PhabricatorAuthManagementUnlimitWorkflow.php
--- a/src/applications/auth/management/PhabricatorAuthManagementUnlimitWorkflow.php
+++ b/src/applications/auth/management/PhabricatorAuthManagementUnlimitWorkflow.php
@@ -27,7 +27,7 @@
 
   public function execute(PhutilArgumentParser $args) {
     $username = $args->getArg('user');
-    if (!strlen($username)) {
+    if (!@strlen($username)) {
       throw new PhutilArgumentUsageException(
         pht(
           'Use %s to choose a user to reset actions for.', '--user'));
diff --git a/src/applications/auth/provider/PhabricatorAsanaAuthProvider.php b/src/applications/auth/provider/PhabricatorAsanaAuthProvider.php
--- a/src/applications/auth/provider/PhabricatorAsanaAuthProvider.php
+++ b/src/applications/auth/provider/PhabricatorAsanaAuthProvider.php
@@ -55,11 +55,11 @@
 
     $pattern = '(https://app\\.asana\\.com/0/(\\d+)/(\\d+))';
     $matches = null;
-    if (!preg_match($pattern, $uri_string, $matches)) {
+    if (!@preg_match($pattern, $uri_string, $matches)) {
       return null;
     }
 
-    if (strlen($uri->getFragment())) {
+    if (@strlen($uri->getFragment())) {
      return null;
     }
 
diff --git a/src/applications/auth/provider/PhabricatorAuthProvider.php b/src/applications/auth/provider/PhabricatorAuthProvider.php
--- a/src/applications/auth/provider/PhabricatorAuthProvider.php
+++ b/src/applications/auth/provider/PhabricatorAuthProvider.php
@@ -545,7 +545,7 @@
 
   public function getAuthCSRFCode(AphrontRequest $request) {
     $phcid = $request->getCookie(PhabricatorCookies::COOKIE_CLIENTID);
-    if (!strlen($phcid)) {
+    if (!@strlen($phcid)) {
       throw new AphrontMalformedRequestException(
         pht('Missing Client ID Cookie'),
         pht(
@@ -562,7 +562,7 @@
   protected function verifyAuthCSRFCode(AphrontRequest $request, $actual) {
     $expect = $this->getAuthCSRFCode($request);
 
-    if (!strlen($actual)) {
+    if (!@strlen($actual)) {
       throw new Exception(
         pht(
           'The authentication provider did not return a client state '.
diff --git a/src/applications/auth/provider/PhabricatorJIRAAuthProvider.php b/src/applications/auth/provider/PhabricatorJIRAAuthProvider.php
--- a/src/applications/auth/provider/PhabricatorJIRAAuthProvider.php
+++ b/src/applications/auth/provider/PhabricatorJIRAAuthProvider.php
@@ -118,17 +118,17 @@
     $key_name = self::PROPERTY_JIRA_NAME;
     $key_uri = self::PROPERTY_JIRA_URI;
 
-    if (!strlen($values[$key_name])) {
+    if (!@strlen($values[$key_name])) {
       $errors[] = pht('JIRA instance name is required.');
       $issues[$key_name] = pht('Required');
-    } else if (!preg_match('/^[a-z0-9.]+\z/', $values[$key_name])) {
+    } else if (!@preg_match('/^[a-z0-9.]+\z/', $values[$key_name])) {
       $errors[] = pht(
         'JIRA instance name must contain only lowercase letters, digits, and '.
         'period.');
       $issues[$key_name] = pht('Invalid');
     }
 
-    if (!strlen($values[$key_uri])) {
+    if (!@strlen($values[$key_uri])) {
       $errors[] = pht('JIRA base URI is required.');
       $issues[$key_uri] = pht('Required');
     } else {
@@ -337,11 +337,11 @@
 
     $pattern = '((https?://\S+?)/browse/([A-Z][A-Z0-9]*-[1-9]\d*))';
     $matches = null;
-    if (!preg_match($pattern, $uri_string, $matches)) {
+    if (!@preg_match($pattern, $uri_string, $matches)) {
       return null;
     }
 
-    if (strlen($uri->getFragment())) {
+    if (@strlen($uri->getFragment())) {
      return null;
     }
 
diff --git a/src/applications/auth/provider/PhabricatorLDAPAuthProvider.php b/src/applications/auth/provider/PhabricatorLDAPAuthProvider.php
--- a/src/applications/auth/provider/PhabricatorLDAPAuthProvider.php
+++ b/src/applications/auth/provider/PhabricatorLDAPAuthProvider.php
@@ -142,10 +142,10 @@
 
     $username = $request->getStr('ldap_username');
     $password = $request->getStr('ldap_password');
-    $has_password = strlen($password);
+    $has_password = @strlen($password);
     $password = new PhutilOpaqueEnvelope($password);
 
-    if (!strlen($username) || !$has_password) {
+    if (!@strlen($username) || !$has_password) {
       $response = $controller->buildProviderPageResponse(
         $this,
         $this->renderLoginForm($request, 'login'));
@@ -154,7 +154,7 @@
 
     if ($request->isFormPost()) {
       try {
-        if (strlen($username) && $has_password) {
+        if (@strlen($username) && $has_password) {
           $adapter = $this->getAdapter();
           $adapter->setLoginUsername($username);
           $adapter->setLoginPassword($password);
@@ -427,7 +427,7 @@
       }
 
       $instruction_text = idx($instructions, $key);
-      if (strlen($instruction_text)) {
+      if (@strlen($instruction_text)) {
         $form->appendRemarkupInstructions($instruction_text);
       }
 
diff --git a/src/applications/auth/provider/PhabricatorOAuth1AuthProvider.php b/src/applications/auth/provider/PhabricatorOAuth1AuthProvider.php
--- a/src/applications/auth/provider/PhabricatorOAuth1AuthProvider.php
+++ b/src/applications/auth/provider/PhabricatorOAuth1AuthProvider.php
@@ -21,7 +21,7 @@
     $config = $this->getProviderConfig();
     $adapter->setConsumerKey($config->getProperty(self::PROPERTY_CONSUMER_KEY));
     $secret = $config->getProperty(self::PROPERTY_CONSUMER_SECRET);
-    if (strlen($secret)) {
+    if (@strlen($secret)) {
       $adapter->setConsumerSecret(new PhutilOpaqueEnvelope($secret));
     }
     $adapter->setCallbackURI(PhabricatorEnv::getURI($this->getLoginURI()));
@@ -67,7 +67,7 @@
     }
 
     $denied = $request->getStr('denied');
-    if (strlen($denied)) {
+    if (@strlen($denied)) {
       // Twitter indicates that the user cancelled the login attempt by
       // returning "denied" as a parameter.
       throw new PhutilAuthUserAbortedException();
@@ -160,7 +160,7 @@
 
     switch ($key) {
       case self::PROPERTY_CONSUMER_KEY:
-        if (strlen($old)) {
+        if (@strlen($old)) {
           return pht(
             '%s updated the OAuth consumer key for this provider from '.
             '"%s" to "%s".',
@@ -175,7 +175,7 @@
             $new);
         }
       case self::PROPERTY_CONSUMER_SECRET:
-        if (strlen($old)) {
+        if (@strlen($old)) {
           return pht(
             '%s updated the OAuth consumer secret for this provider.',
             $xaction->renderHandleLink($author_phid));
diff --git a/src/applications/auth/provider/PhabricatorOAuth2AuthProvider.php b/src/applications/auth/provider/PhabricatorOAuth2AuthProvider.php
--- a/src/applications/auth/provider/PhabricatorOAuth2AuthProvider.php
+++ b/src/applications/auth/provider/PhabricatorOAuth2AuthProvider.php
@@ -64,7 +64,7 @@
     $this->verifyAuthCSRFCode($request, $request->getStr('state'));
 
     $code = $request->getStr('code');
-    if (!strlen($code)) {
+    if (!@strlen($code)) {
       $response = $controller->buildProviderErrorResponse(
         $this,
         pht(
@@ -137,7 +137,7 @@
 
     switch ($key) {
       case self::PROPERTY_APP_ID:
-        if (strlen($old)) {
+        if (@strlen($old)) {
           return pht(
             '%s updated the OAuth application ID for this provider from '.
             '"%s" to "%s".',
@@ -152,7 +152,7 @@
             $new);
         }
       case self::PROPERTY_APP_SECRET:
-        if (strlen($old)) {
+        if (@strlen($old)) {
           return pht(
             '%s updated the OAuth application secret for this provider.',
             $xaction->renderHandleLink($author_phid));
@@ -162,7 +162,7 @@
             $xaction->renderHandleLink($author_phid));
         }
       case self::PROPERTY_NOTE:
-        if (strlen($old)) {
+        if (@strlen($old)) {
           return pht(
             '%s updated the OAuth application notes for this provider.',
             $xaction->renderHandleLink($author_phid));
diff --git a/src/applications/auth/provider/PhabricatorOAuthAuthProvider.php b/src/applications/auth/provider/PhabricatorOAuthAuthProvider.php
--- a/src/applications/auth/provider/PhabricatorOAuthAuthProvider.php
+++ b/src/applications/auth/provider/PhabricatorOAuthAuthProvider.php
@@ -59,19 +59,19 @@
     $key_id = $this->getIDKey();
     $key_secret = $this->getSecretKey();
 
-    if (!strlen($values[$key_id])) {
+    if (!@strlen($values[$key_id])) {
       $errors[] = $id_error;
       $issues[$key_id] = pht('Required');
     }
 
-    if (!strlen($values[$key_secret])) {
+    if (!@strlen($values[$key_secret])) {
       $errors[] = $secret_error;
       $issues[$key_secret] = pht('Required');
     }
 
     // If the user has not changed the secret, don't update it (that is,
     // don't cause a bunch of "****" to be written to the database).
-    if (preg_match('/^[*]+$/', $values[$key_secret])) {
+    if (@preg_match('/^[*]+$/', $values[$key_secret])) {
       unset($values[$key_secret]);
     }
 
@@ -104,7 +104,7 @@
     $v_id = $values[$key_id];
     $v_secret = $values[$key_secret];
     if ($v_secret) {
-      $v_secret = str_repeat('*', strlen($v_secret));
+      $v_secret = str_repeat('*', @strlen($v_secret));
     }
     $v_note = $values[$key_note];
 
@@ -144,7 +144,7 @@
 
     switch ($key) {
       case self::PROPERTY_NOTE:
-        if (strlen($old)) {
+        if (@strlen($old)) {
           return pht(
             '%s updated the OAuth application notes for this provider.',
             $xaction->renderHandleLink($author_phid));
diff --git a/src/applications/auth/provider/PhabricatorPasswordAuthProvider.php b/src/applications/auth/provider/PhabricatorPasswordAuthProvider.php
--- a/src/applications/auth/provider/PhabricatorPasswordAuthProvider.php
+++ b/src/applications/auth/provider/PhabricatorPasswordAuthProvider.php
@@ -285,7 +285,7 @@
     if ($request->isFormPost()) {
       if (!$require_captcha || $captcha_valid) {
         $username_or_email = $request->getStr('username');
-        if (strlen($username_or_email)) {
+        if (@strlen($username_or_email)) {
           $user = id(new PhabricatorUser())->loadOneWhere(
             'username = %s',
             $username_or_email);
diff --git a/src/applications/auth/provider/PhabricatorPhabricatorAuthProvider.php b/src/applications/auth/provider/PhabricatorPhabricatorAuthProvider.php
--- a/src/applications/auth/provider/PhabricatorPhabricatorAuthProvider.php
+++ b/src/applications/auth/provider/PhabricatorPhabricatorAuthProvider.php
@@ -105,17 +105,17 @@
     $key_name = self::PROPERTY_PHABRICATOR_NAME;
     $key_uri = self::PROPERTY_PHABRICATOR_URI;
 
-    if (!strlen($values[$key_name])) {
+    if (!@strlen($values[$key_name])) {
       $errors[] = pht('Phabricator instance name is required.');
       $issues[$key_name] = pht('Required');
-    } else if (!preg_match('/^[a-z0-9.]+\z/', $values[$key_name])) {
+    } else if (!@preg_match('/^[a-z0-9.]+\z/', $values[$key_name])) {
       $errors[] = pht(
         'Phabricator instance name must contain only lowercase letters, '.
         'digits, and periods.');
       $issues[$key_name] = pht('Invalid');
     }
 
-    if (!strlen($values[$key_uri])) {
+    if (!@strlen($values[$key_uri])) {
       $errors[] = pht('Phabricator base URI is required.');
       $issues[$key_uri] = pht('Required');
     } else {
diff --git a/src/applications/auth/sshkey/PhabricatorAuthSSHPrivateKey.php b/src/applications/auth/sshkey/PhabricatorAuthSSHPrivateKey.php
--- a/src/applications/auth/sshkey/PhabricatorAuthSSHPrivateKey.php
+++ b/src/applications/auth/sshkey/PhabricatorAuthSSHPrivateKey.php
@@ -144,7 +144,7 @@
 
     $reason = 'unknown';
     foreach ($patterns as $pattern => $pattern_reason) {
-      $ok = preg_match($pattern, $stderr);
+      $ok = @preg_match($pattern, $stderr);
 
       if ($ok === false) {
         throw new Exception(
diff --git a/src/applications/auth/sshkey/PhabricatorAuthSSHPublicKey.php b/src/applications/auth/sshkey/PhabricatorAuthSSHPublicKey.php
--- a/src/applications/auth/sshkey/PhabricatorAuthSSHPublicKey.php
+++ b/src/applications/auth/sshkey/PhabricatorAuthSSHPublicKey.php
@@ -24,7 +24,7 @@
 
   public static function newFromRawKey($entire_key) {
     $entire_key = trim($entire_key);
-    if (!strlen($entire_key)) {
+    if (!@strlen($entire_key)) {
       throw new Exception(pht('No public key was provided.'));
     }
 
@@ -34,7 +34,7 @@
     // into a maximum of three parts.
     $parts = preg_split('/\s+/', $parts, 3);
 
-    if (preg_match('/private\s*key/i', $entire_key)) {
+    if (@preg_match('/private\s*key/i', $entire_key)) {
       // Try to give the user a better error message if it looks like
       // they uploaded a private key.
       throw new Exception(pht('Provide a public key, not a private key!'));
@@ -102,7 +102,7 @@
 
   public function getEntireKey() {
     $key = $this->type.' '.$this->body;
-    if (strlen($this->comment)) {
+    if (@strlen($this->comment)) {
       $key = $key.' '.$this->comment;
     }
     return $key;
diff --git a/src/applications/auth/storage/PhabricatorAuthChallenge.php b/src/applications/auth/storage/PhabricatorAuthChallenge.php
--- a/src/applications/auth/storage/PhabricatorAuthChallenge.php
+++ b/src/applications/auth/storage/PhabricatorAuthChallenge.php
@@ -57,27 +57,27 @@
     assert_instances_of($challenges, __CLASS__);
 
     $token_list = $request->getStr(self::HTTPKEY);
-    $token_list = explode(' ', $token_list);
+    $token_list = @explode(' ', $token_list);
 
     $token_map = array();
     foreach ($token_list as $token_element) {
       $token_element = trim($token_element, ' ');
 
-      if (!strlen($token_element)) {
+      if (!@strlen($token_element)) {
         continue;
       }
 
       // NOTE: This error message is intentionally not printing the token to
       // avoid disclosing it. As a result, it isn't terribly useful, but no
       // normal user should ever end up here.
-      if (!preg_match('/^[^:]+:/', $token_element)) {
+      if (!@preg_match('/^[^:]+:/', $token_element)) {
         throw new Exception(
           pht(
             'This request included an improperly formatted MFA challenge '.
             'token and can not be processed.'));
       }
 
-      list($phid, $token) = explode(':', $token_element, 2);
+      list($phid, $token) = @explode(':', $token_element, 2);
 
       if (isset($token_map[$phid])) {
         throw new Exception(
@@ -194,7 +194,7 @@
           'set a new response token.'));
     }
 
-    if (preg_match('/ /', $token->openEnvelope())) {
+    if (@preg_match('/ /', $token->openEnvelope())) {
       throw new Exception(
         pht(
           'The response token for this challenge is invalid: response '.
diff --git a/src/applications/auth/storage/PhabricatorAuthFactorProvider.php b/src/applications/auth/storage/PhabricatorAuthFactorProvider.php
--- a/src/applications/auth/storage/PhabricatorAuthFactorProvider.php
+++ b/src/applications/auth/storage/PhabricatorAuthFactorProvider.php
@@ -76,7 +76,7 @@
 
   public function getDisplayName() {
     $name = $this->getName();
-    if (strlen($name)) {
+    if (@strlen($name)) {
       return $name;
     }
 
diff --git a/src/applications/auth/storage/PhabricatorAuthMessage.php b/src/applications/auth/storage/PhabricatorAuthMessage.php
--- a/src/applications/auth/storage/PhabricatorAuthMessage.php
+++ b/src/applications/auth/storage/PhabricatorAuthMessage.php
@@ -77,7 +77,7 @@
     $message = self::loadMessage($viewer, $message_key);
     if ($message) {
       $message_text = $message->getMessageText();
-      if (strlen($message_text)) {
+      if (@strlen($message_text)) {
         return $message_text;
       }
     }
diff --git a/src/applications/auth/storage/PhabricatorAuthPassword.php b/src/applications/auth/storage/PhabricatorAuthPassword.php
--- a/src/applications/auth/storage/PhabricatorAuthPassword.php
+++ b/src/applications/auth/storage/PhabricatorAuthPassword.php
@@ -109,7 +109,7 @@
     PhabricatorAuthPasswordHashInterface $object,
     PhabricatorPasswordHasher $hasher) {
 
-    if (!strlen($password->openEnvelope())) {
+    if (!@strlen($password->openEnvelope())) {
       throw new Exception(
         pht('Attempting to set an empty password!'));
     }
diff --git a/src/applications/auth/storage/PhabricatorAuthProviderConfigTransaction.php b/src/applications/auth/storage/PhabricatorAuthProviderConfigTransaction.php
--- a/src/applications/auth/storage/PhabricatorAuthProviderConfigTransaction.php
+++ b/src/applications/auth/storage/PhabricatorAuthProviderConfigTransaction.php
@@ -150,7 +150,7 @@
         $provider = $this->getProvider();
         if ($provider) {
           $title = $provider->renderConfigPropertyTransactionTitle($this);
-          if (strlen($title)) {
+          if (@strlen($title)) {
             return $title;
           }
         }
diff --git a/src/applications/auth/view/PhabricatorAuthAccountView.php b/src/applications/auth/view/PhabricatorAuthAccountView.php
--- a/src/applications/auth/view/PhabricatorAuthAccountView.php
+++ b/src/applications/auth/view/PhabricatorAuthAccountView.php
@@ -29,13 +29,13 @@
     $realname = $account->getRealName();
 
     $use_name = null;
-    if (strlen($dispname)) {
+    if (@strlen($dispname)) {
       $use_name = $dispname;
-    } else if (strlen($username) && strlen($realname)) {
+    } else if (@strlen($username) && @strlen($realname)) {
       $use_name = $username.' ('.$realname.')';
-    } else if (strlen($username)) {
+    } else if (@strlen($username)) {
       $use_name = $username;
-    } else if (strlen($realname)) {
+    } else if (@strlen($realname)) {
       $use_name = $realname;
     }
 
@@ -62,7 +62,7 @@
       ));
 
     $account_uri = $account->getAccountURI();
-    if (strlen($account_uri)) {
+    if (@strlen($account_uri)) {
 
       // Make sure we don't link a "javascript:" URI if a user somehow
       // managed to get one here.
diff --git a/src/applications/auth/xaction/PhabricatorAuthContactNumberNumberTransaction.php b/src/applications/auth/xaction/PhabricatorAuthContactNumberNumberTransaction.php
--- a/src/applications/auth/xaction/PhabricatorAuthContactNumberNumberTransaction.php
+++ b/src/applications/auth/xaction/PhabricatorAuthContactNumberNumberTransaction.php
@@ -42,7 +42,7 @@
     $max_length = $object->getColumnMaximumByteLength('contactNumber');
     foreach ($xactions as $xaction) {
       $new_value = $xaction->getNewValue();
-      $new_length = strlen($new_value);
+      $new_length = @strlen($new_value);
       if ($new_length > $max_length) {
         $errors[] = $this->newInvalidError(
           pht(
diff --git a/src/applications/auth/xaction/PhabricatorAuthFactorProviderDuoCredentialTransaction.php b/src/applications/auth/xaction/PhabricatorAuthFactorProviderDuoCredentialTransaction.php
--- a/src/applications/auth/xaction/PhabricatorAuthFactorProviderDuoCredentialTransaction.php
+++ b/src/applications/auth/xaction/PhabricatorAuthFactorProviderDuoCredentialTransaction.php
@@ -40,7 +40,7 @@
     foreach ($xactions as $xaction) {
       $new_value = $xaction->getNewValue();
 
-      if (!strlen($new_value)) {
+      if (!@strlen($new_value)) {
         continue;
       }
 
diff --git a/src/applications/auth/xaction/PhabricatorAuthFactorProviderDuoHostnameTransaction.php b/src/applications/auth/xaction/PhabricatorAuthFactorProviderDuoHostnameTransaction.php
--- a/src/applications/auth/xaction/PhabricatorAuthFactorProviderDuoHostnameTransaction.php
+++ b/src/applications/auth/xaction/PhabricatorAuthFactorProviderDuoHostnameTransaction.php
@@ -39,7 +39,7 @@
     foreach ($xactions as $xaction) {
       $new_value = $xaction->getNewValue();
 
-      if (!strlen($new_value)) {
+      if (!@strlen($new_value)) {
         continue;
       }
 
diff --git a/src/applications/auth/xaction/PhabricatorAuthFactorProviderNameTransaction.php b/src/applications/auth/xaction/PhabricatorAuthFactorProviderNameTransaction.php
--- a/src/applications/auth/xaction/PhabricatorAuthFactorProviderNameTransaction.php
+++ b/src/applications/auth/xaction/PhabricatorAuthFactorProviderNameTransaction.php
@@ -17,12 +17,12 @@
     $old = $this->getOldValue();
     $new = $this->getNewValue();
 
-    if (!strlen($old)) {
+    if (!@strlen($old)) {
       return pht(
         '%s named this provider %s.',
         $this->renderAuthor(),
         $this->renderNewValue());
-    } else if (!strlen($new)) {
+    } else if (!@strlen($new)) {
       return pht(
         '%s removed the name (%s) of this provider.',
         $this->renderAuthor(),
@@ -42,7 +42,7 @@
     $max_length = $object->getColumnMaximumByteLength('name');
     foreach ($xactions as $xaction) {
       $new_value = $xaction->getNewValue();
-      $new_length = strlen($new_value);
+      $new_length = @strlen($new_value);
       if ($new_length > $max_length) {
         $errors[] = $this->newInvalidError(
           pht(
diff --git a/src/applications/badges/controller/PhabricatorBadgesViewController.php b/src/applications/badges/controller/PhabricatorBadgesViewController.php
--- a/src/applications/badges/controller/PhabricatorBadgesViewController.php
+++ b/src/applications/badges/controller/PhabricatorBadgesViewController.php
@@ -63,7 +63,7 @@
       ->setUser($viewer);
 
     $description = $badge->getDescription();
-    if (strlen($description)) {
+    if (@strlen($description)) {
       $view->addTextContent(
         new PHUIRemarkupView($viewer, $description));
     }
diff --git a/src/applications/badges/mail/PhabricatorBadgesMailReceiver.php b/src/applications/badges/mail/PhabricatorBadgesMailReceiver.php
--- a/src/applications/badges/mail/PhabricatorBadgesMailReceiver.php
+++ b/src/applications/badges/mail/PhabricatorBadgesMailReceiver.php
@@ -13,7 +13,7 @@
   }
 
   protected function loadObject($pattern, PhabricatorUser $viewer) {
-    $id = (int)substr($pattern, 4);
+    $id = (int)@substr($pattern, 4);
 
     return id(new PhabricatorBadgesQuery())
       ->setViewer($viewer)
diff --git a/src/applications/badges/xaction/PhabricatorBadgesBadgeFlavorTransaction.php b/src/applications/badges/xaction/PhabricatorBadgesBadgeFlavorTransaction.php
--- a/src/applications/badges/xaction/PhabricatorBadgesBadgeFlavorTransaction.php
+++ b/src/applications/badges/xaction/PhabricatorBadgesBadgeFlavorTransaction.php
@@ -36,7 +36,7 @@
     $max_length = $object->getColumnMaximumByteLength('flavor');
     foreach ($xactions as $xaction) {
       $new_value = $xaction->getNewValue();
-      $new_length = strlen($new_value);
+      $new_length = @strlen($new_value);
       if ($new_length > $max_length) {
         $errors[] = $this->newRequiredError(
           pht('The flavor text can be no longer than %s characters.',
diff --git a/src/applications/badges/xaction/PhabricatorBadgesBadgeNameTransaction.php b/src/applications/badges/xaction/PhabricatorBadgesBadgeNameTransaction.php
--- a/src/applications/badges/xaction/PhabricatorBadgesBadgeNameTransaction.php
+++ b/src/applications/badges/xaction/PhabricatorBadgesBadgeNameTransaction.php
@@ -41,7 +41,7 @@
     $max_length = $object->getColumnMaximumByteLength('name');
     foreach ($xactions as $xaction) {
       $new_value = $xaction->getNewValue();
-      $new_length = strlen($new_value);
+      $new_length = @strlen($new_value);
       if ($new_length > $max_length) {
         $errors[] = $this->newInvalidError(
           pht('The name can be no longer than %s characters.',
diff --git a/src/applications/base/controller/PhabricatorController.php b/src/applications/base/controller/PhabricatorController.php
--- a/src/applications/base/controller/PhabricatorController.php
+++ b/src/applications/base/controller/PhabricatorController.php
@@ -74,7 +74,7 @@
       $session_engine = new PhabricatorAuthSessionEngine();
 
       $phsid = $request->getCookie(PhabricatorCookies::COOKIE_SESSION);
-      if (strlen($phsid)) {
+      if (@strlen($phsid)) {
         $session_user = $session_engine->loadUserForSession(
           PhabricatorAuthSession::TYPE_WEB,
           $phsid);
diff --git a/src/applications/cache/PhabricatorCaches.php b/src/applications/cache/PhabricatorCaches.php
--- a/src/applications/cache/PhabricatorCaches.php
+++ b/src/applications/cache/PhabricatorCaches.php
@@ -421,7 +421,7 @@
    * @task compress
    */
   public static function maybeDeflateData($value) {
-    $len = strlen($value);
+    $len = @strlen($value);
     if ($len <= 1024) {
       return null;
     }
@@ -435,7 +435,7 @@
       return null;
     }
 
-    $deflated_len = strlen($deflated);
+    $deflated_len = @strlen($deflated);
     if ($deflated_len >= ($len / 2)) {
       return null;
     }
diff --git a/src/applications/cache/management/PhabricatorCacheManagementPurgeWorkflow.php b/src/applications/cache/management/PhabricatorCacheManagementPurgeWorkflow.php
--- a/src/applications/cache/management/PhabricatorCacheManagementPurgeWorkflow.php
+++ b/src/applications/cache/management/PhabricatorCacheManagementPurgeWorkflow.php
@@ -27,11 +27,11 @@
     $is_all = $args->getArg('all');
     $key_list = $args->getArg('caches');
 
-    if ($is_all && strlen($key_list)) {
+    if ($is_all && @strlen($key_list)) {
       throw new PhutilArgumentUsageException(
         pht(
           'Specify either "--all" or "--caches", not both.'));
-    } else if (!$is_all && !strlen($key_list)) {
+    } else if (!$is_all && !@strlen($key_list)) {
       throw new PhutilArgumentUsageException(
         pht(
           'Select caches to purge with "--all" or "--caches". Available '.
diff --git a/src/applications/cache/spec/PhabricatorDataCacheSpec.php b/src/applications/cache/spec/PhabricatorDataCacheSpec.php
--- a/src/applications/cache/spec/PhabricatorDataCacheSpec.php
+++ b/src/applications/cache/spec/PhabricatorDataCacheSpec.php
@@ -141,7 +141,7 @@
     // If this key isn't in the current cache namespace, don't reveal any
     // information about it.
     $namespace = PhabricatorEnv::getEnvConfig('phabricator.cache-namespace');
-    if (strncmp($key, $namespace.':', strlen($namespace) + 1)) {
+    if (strncmp($key, $namespace.':', @strlen($namespace) + 1)) {
       return '<other-namespace>';
     }
 
diff --git a/src/applications/calendar/controller/PhabricatorCalendarEventViewController.php b/src/applications/calendar/controller/PhabricatorCalendarEventViewController.php
--- a/src/applications/calendar/controller/PhabricatorCalendarEventViewController.php
+++ b/src/applications/calendar/controller/PhabricatorCalendarEventViewController.php
@@ -515,7 +515,7 @@
     $properties = id(new PHUIPropertyListView())
       ->setUser($viewer);
 
-    if (strlen($event->getDescription())) {
+    if (@strlen($event->getDescription())) {
       $description = new PHUIRemarkupView($viewer, $event->getDescription());
       $properties->addTextContent($description);
       return $properties;
diff --git a/src/applications/calendar/editor/PhabricatorCalendarEventEditor.php b/src/applications/calendar/editor/PhabricatorCalendarEventEditor.php
--- a/src/applications/calendar/editor/PhabricatorCalendarEventEditor.php
+++ b/src/applications/calendar/editor/PhabricatorCalendarEventEditor.php
@@ -324,7 +324,7 @@
 
     $description = $object->getDescription();
     if ($this->getIsNewObject()) {
-      if (strlen($description)) {
+      if (@strlen($description)) {
         $body->addRemarkupSection(
           pht('EVENT DESCRIPTION'),
           $description);
diff --git a/src/applications/calendar/import/PhabricatorCalendarICSFileImportEngine.php b/src/applications/calendar/import/PhabricatorCalendarICSFileImportEngine.php
--- a/src/applications/calendar/import/PhabricatorCalendarICSFileImportEngine.php
+++ b/src/applications/calendar/import/PhabricatorCalendarICSFileImportEngine.php
@@ -56,7 +56,7 @@
   public function getDisplayName(PhabricatorCalendarImport $import) {
     $filename_key = PhabricatorCalendarImportICSFileTransaction::PARAMKEY_NAME;
     $filename = $import->getParameter($filename_key);
-    if (strlen($filename)) {
+    if (@strlen($filename)) {
       return pht('ICS File "%s"', $filename);
     } else {
       return pht('ICS File');
diff --git a/src/applications/calendar/import/PhabricatorCalendarImportEngine.php b/src/applications/calendar/import/PhabricatorCalendarImportEngine.php
--- a/src/applications/calendar/import/PhabricatorCalendarImportEngine.php
+++ b/src/applications/calendar/import/PhabricatorCalendarImportEngine.php
@@ -161,7 +161,7 @@
     foreach ($node_map as $full_uid => $node) {
       $uid = $node->getUID();
       $matches = null;
-      if (preg_match('/^(PHID-.*)@(.*)\z/', $uid, $matches)) {
+      if (@preg_match('/^(PHID-.*)@(.*)\z/', $uid, $matches)) {
         $likely_phids[$full_uid] = $matches[1];
       }
     }
@@ -235,14 +235,14 @@
         // We avoid disclosing email addresses to be consistent with the rest
         // of the product.
         $name = $attendee->getName();
-        if (preg_match('/@/', $name)) {
+        if (@preg_match('/@/', $name)) {
           $name = new PhutilEmailAddress($name);
           $name = $name->getDisplayName();
         }
 
         // If we don't have a name or the name still looks like it's an
         // email address, give them a dummy placeholder name.
-        if (!strlen($name) || preg_match('/@/', $name)) {
+        if (!@strlen($name) || @preg_match('/@/', $name)) {
           $name = pht('Private User %d', $private_index);
           $private_index++;
         }
@@ -447,7 +447,7 @@
   private function getParentNodeUID(PhutilCalendarEventNode $node) {
     $recurrence_id = $node->getRecurrenceID();
 
-    if (!strlen($recurrence_id)) {
+    if (!@strlen($recurrence_id)) {
       return null;
     }
 
@@ -456,7 +456,7 @@
 
   private function getNodeInstanceEpoch(PhutilCalendarEventNode $node) {
     $instance_iso = $node->getRecurrenceID();
-    if (strlen($instance_iso)) {
+    if (@strlen($instance_iso)) {
       $instance_datetime = PhutilCalendarAbsoluteDateTime::newFromISO8601(
         $instance_iso);
       $instance_epoch = $instance_datetime->getEpoch();
@@ -481,8 +481,8 @@
     }
 
     $name = $node->getName();
-    if (!strlen($name)) {
-      if (strlen($uid)) {
+    if (!@strlen($name)) {
+      if (@strlen($uid)) {
         $name = pht('Unnamed Event "%s"', $uid);
       } else {
         $name = pht('Unnamed Imported Event');
@@ -571,7 +571,7 @@
   }
 
   final protected function shouldQueueDataImport($data) {
-    return (strlen($data) > self::QUEUE_BYTE_LIMIT);
+    return (@strlen($data) > self::QUEUE_BYTE_LIMIT);
   }
 
   final protected function queueDataImport(
@@ -581,7 +581,7 @@
     $import->newLogMessage(
       PhabricatorCalendarImportQueueLogType::LOGTYPE,
       array(
-        'data.size' => strlen($data),
+        'data.size' => @strlen($data),
         'data.limit' => self::QUEUE_BYTE_LIMIT,
       ));
 
diff --git a/src/applications/calendar/importlog/PhabricatorCalendarImportDefaultLogType.php b/src/applications/calendar/importlog/PhabricatorCalendarImportDefaultLogType.php
--- a/src/applications/calendar/importlog/PhabricatorCalendarImportDefaultLogType.php
+++ b/src/applications/calendar/importlog/PhabricatorCalendarImportDefaultLogType.php
@@ -10,7 +10,7 @@
     PhabricatorCalendarImportLog $log) {
 
     $type = $log->getParameter('type');
-    if (strlen($type)) {
+    if (@strlen($type)) {
       return pht('Unknown Message "%s"', $type);
     } else {
       return pht('Unknown Message');
diff --git a/src/applications/calendar/mail/PhabricatorCalendarEventMailReceiver.php b/src/applications/calendar/mail/PhabricatorCalendarEventMailReceiver.php
--- a/src/applications/calendar/mail/PhabricatorCalendarEventMailReceiver.php
+++ b/src/applications/calendar/mail/PhabricatorCalendarEventMailReceiver.php
@@ -13,7 +13,7 @@
   }
 
   protected function loadObject($pattern, PhabricatorUser $viewer) {
-    $id = (int)substr($pattern, 1);
+    $id = (int)@substr($pattern, 1);
 
     return id(new PhabricatorCalendarEventQuery())
       ->setViewer($viewer)
diff --git a/src/applications/calendar/parser/data/PhutilCalendarAbsoluteDateTime.php b/src/applications/calendar/parser/data/PhutilCalendarAbsoluteDateTime.php
--- a/src/applications/calendar/parser/data/PhutilCalendarAbsoluteDateTime.php
+++ b/src/applications/calendar/parser/data/PhutilCalendarAbsoluteDateTime.php
@@ -21,7 +21,7 @@
       '\z/';
 
     $matches = null;
-    $ok = preg_match($pattern, $value, $matches);
+    $ok = @preg_match($pattern, $value, $matches);
     if (!$ok) {
       throw new Exception(
         pht(
diff --git a/src/applications/calendar/parser/data/PhutilCalendarDuration.php b/src/applications/calendar/parser/data/PhutilCalendarDuration.php
--- a/src/applications/calendar/parser/data/PhutilCalendarDuration.php
+++ b/src/applications/calendar/parser/data/PhutilCalendarDuration.php
@@ -70,7 +70,7 @@
       '\z/';
 
     $matches = null;
-    $ok = preg_match($pattern, $value, $matches);
+    $ok = @preg_match($pattern, $value, $matches);
     if (!$ok) {
       throw new Exception(
         pht(
diff --git a/src/applications/calendar/parser/data/PhutilCalendarRecurrenceRule.php b/src/applications/calendar/parser/data/PhutilCalendarRecurrenceRule.php
--- a/src/applications/calendar/parser/data/PhutilCalendarRecurrenceRule.php
+++ b/src/applications/calendar/parser/data/PhutilCalendarRecurrenceRule.php
@@ -235,11 +235,11 @@
   }
 
   public static function newFromRRULE($rrule) {
-    $parts = explode(';', $rrule);
+    $parts = @explode(';', $rrule);
 
     $dict = array();
     foreach ($parts as $part) {
-      list($key, $value) = explode('=', $part, 2);
+      list($key, $value) = @explode('=', $part, 2);
       switch ($key) {
         case 'FREQ':
         case 'INTERVAL':
@@ -248,7 +248,7 @@
         case 'UNTIL';
           break;
         default:
-          $value = explode(',', $value);
+          $value = @explode(',', $value);
           break;
       }
       $dict[$key] = $value;
@@ -276,7 +276,7 @@
     foreach ($dict as $key => $value) {
       if (isset($int_values[$key])) {
         // None of these values may be negative.
-        if (!preg_match('/^\d+\z/', $value)) {
+        if (!@preg_match('/^\d+\z/', $value)) {
           throw new Exception(
             pht(
               'Unexpected value "%s" in "%s" RULE property: expected an '.
@@ -289,7 +289,7 @@
 
       if (isset($int_lists[$key])) {
         foreach ($value as $k => $v) {
-          if (!preg_match('/^-?\d+\z/', $v)) {
+          if (!@preg_match('/^-?\d+\z/', $v)) {
             throw new Exception(
               pht(
                 'Unexpected value "%s" in "%s" RRULE property: expected '.
@@ -466,7 +466,7 @@
     $pattern = '/^(?:[+-]?([1-9]\d?))?('.$constants.')\z/';
     foreach ($by_day as $key => $value) {
       $matches = null;
-      if (!preg_match($pattern, $value, $matches)) {
+      if (!@preg_match($pattern, $value, $matches)) {
         throw new Exception(
           pht(
             'RRULE BYDAY value "%s" is invalid: rule part must be in the '.
diff --git a/src/applications/calendar/parser/ics/PhutilICSParser.php b/src/applications/calendar/parser/ics/PhutilICSParser.php
--- a/src/applications/calendar/parser/ics/PhutilICSParser.php
+++ b/src/applications/calendar/parser/ics/PhutilICSParser.php
@@ -52,9 +52,9 @@
     foreach ($lines as $key => $line) {
       $this->cursor = $key;
       $matches = null;
-      if (preg_match('(^BEGIN:(.*)\z)', $line, $matches)) {
+      if (@preg_match('(^BEGIN:(.*)\z)', $line, $matches)) {
         $this->beginParsingNode($matches[1]);
-      } else if (preg_match('(^END:(.*)\z)', $line, $matches)) {
+      } else if (@preg_match('(^END:(.*)\z)', $line, $matches)) {
         $this->endParsingNode($matches[1]);
       } else {
         if (count($this->stack) < 2) {
@@ -101,7 +101,7 @@
     $last = null;
     foreach ($lines as $idx => $line) {
       $this->cursor = $idx;
-      if (!preg_match('/^[ \t]/', $line)) {
+      if (!@preg_match('/^[ \t]/', $line)) {
         $last = $idx;
         continue;
       }
@@ -114,7 +114,7 @@
             'marks a line which should be unfolded.'));
       }
 
-      $lines[$last] = $lines[$last].substr($line, 1);
+      $lines[$last] = $lines[$last].@substr($line, 1);
       unset($lines[$idx]);
     }
 
@@ -195,7 +195,7 @@
     // by either a ";" (to begin a list of parameters) or a ":" (to begin
     // the actual field body).
 
-    $ok = preg_match('(^([A-Za-z0-9-]+)([;:])(.*)\z)', $line, $matches);
+    $ok = @preg_match('(^([A-Za-z0-9-]+)([;:])(.*)\z)', $line, $matches);
     if (!$ok) {
       $this->raiseParseFailure(
         self::PARSE_MALFORMED_PROPERTY,
@@ -214,7 +214,7 @@
 
       while (true) {
         // We're going to get the first couple of parts first.
-        $ok = preg_match('(^([^=]+)=)', $body, $matches);
+        $ok = @preg_match('(^([^=]+)=)', $body, $matches);
         if (!$ok) {
           $this->raiseParseFailure(
             self::PARSE_MALFORMED_PARAMETER_NAME,
@@ -224,16 +224,16 @@
         }
 
         $param_name = $matches[1];
-        $body = substr($body, strlen($matches[0]));
+        $body = @substr($body, @strlen($matches[0]));
 
         // Now we're going to match zero or more values.
         $param_values = array();
         while (true) {
           // The value can either be a double-quoted string or an unquoted
           // string, with some characters forbidden.
-          if (strlen($body) && $body[0] == '"') {
+          if (@strlen($body) && $body[0] == '"') {
             $is_quoted = true;
-            $ok = preg_match(
+            $ok = @preg_match(
               '(^"([^\x00-\x08\x10-\x19"]*)")',
               $body,
               $matches);
@@ -249,7 +249,7 @@
 
             // It's impossible for this not to match since it can match
             // nothing, and it's valid for it to match nothing.
-            preg_match('(^([^\x00-\x08\x10-\x19";:,]*))', $body, $matches);
+            @preg_match('(^([^\x00-\x08\x10-\x19";:,]*))', $body, $matches);
           }
 
           // NOTE: RFC5545 says "Property parameter values that are not in
@@ -262,8 +262,8 @@
             'quoted' => $is_quoted,
           );
 
-          $body = substr($body, strlen($matches[0]));
-          if (!strlen($body)) {
+          $body = @substr($body, @strlen($matches[0]));
+          if (!@strlen($body)) {
             $this->raiseParseFailure(
               self::PARSE_MISSING_VALUE,
               pht(
@@ -273,7 +273,7 @@
           // If we have a comma now, we're going to read another value. Strip
           // it off and keep going.
           if ($body[0] == ',') {
-            $body = substr($body, 1);
+            $body = @substr($body, 1);
             continue;
           }
 
@@ -306,12 +306,12 @@
         );
 
         if ($body[0] == ';') {
-          $body = substr($body, 1);
+          $body = @substr($body, 1);
           continue;
         }
 
         if ($body[0] == ':') {
-          $body = substr($body, 1);
+          $body = @substr($body, 1);
           break;
         }
       }
@@ -488,36 +488,36 @@
         break;
       case 'DATE':
         // This is a comma-separated list of "YYYYMMDD" values.
-        $result = explode(',', $data);
+        $result = @explode(',', $data);
         break;
       case 'DATE-TIME':
-        if (!strlen($data)) {
+        if (!@strlen($data)) {
           $result = array();
         } else {
-          $result = explode(',', $data);
+          $result = @explode(',', $data);
         }
         break;
       case 'DURATION':
-        if (!strlen($data)) {
+        if (!@strlen($data)) {
           $result = array();
         } else {
-          $result = explode(',', $data);
+          $result = @explode(',', $data);
         }
         break;
       case 'FLOAT':
-        $result = explode(',', $data);
+        $result = @explode(',', $data);
         foreach ($result as $k => $v) {
           $result[$k] = (float)$v;
         }
         break;
       case 'INTEGER':
-        $result = explode(',', $data);
+        $result = @explode(',', $data);
         foreach ($result as $k => $v) {
           $result[$k] = (int)$v;
         }
         break;
       case 'PERIOD':
-        $result = explode(',', $data);
+        $result = @explode(',', $data);
         break;
       case 'RECUR':
         $result = $data;
@@ -526,7 +526,7 @@
         $result = $this->unescapeTextValue($data);
         break;
       case 'TIME':
-        $result = explode(',', $data);
+        $result = @explode(',', $data);
         break;
       case 'URI':
         $result = $data;
@@ -728,7 +728,7 @@
     $value = head($value);
     $tzid = $this->getScalarParameterValue($parameters, 'TZID');
 
-    if (preg_match('/Z\z/', $value)) {
+    if (@preg_match('/Z\z/', $value)) {
       if ($tzid) {
         $this->raiseWarning(
           self::WARN_TZID_UTC,
@@ -876,7 +876,7 @@
       '/i';
 
     $matches = null;
-    if (preg_match($offset_pattern, $tzid, $matches)) {
+    if (@preg_match($offset_pattern, $tzid, $matches)) {
       $hours = (int)$matches['h'];
       $minutes = (int)idx($matches, 'm');
       $offset = ($hours * 60 * 60) + ($minutes * 60);
diff --git a/src/applications/calendar/parser/ics/PhutilICSWriter.php b/src/applications/calendar/parser/ics/PhutilICSWriter.php
--- a/src/applications/calendar/parser/ics/PhutilICSWriter.php
+++ b/src/applications/calendar/parser/ics/PhutilICSWriter.php
@@ -94,7 +94,7 @@
     foreach (phutil_utf8v($line) as $character) {
       // If adding this character would bring the line over 75 bytes, start
       // a new line.
-      if (strlen($buf) + strlen($character) > 75) {
+      if (@strlen($buf) + @strlen($character) > 75) {
         $out[] = $buf."\r\n";
         $buf = ' ';
       }
@@ -137,7 +137,7 @@
     $properties = array();
 
     $uid = $event->getUID();
-    if (!strlen($uid)) {
+    if (!@strlen($uid)) {
       throw new Exception(
         pht(
           'Unable to write ICS document: event has no UID, but each event '.
@@ -180,14 +180,14 @@
     }
 
     $name = $event->getName();
-    if (strlen($name)) {
+    if (@strlen($name)) {
       $properties[] = $this->newTextProperty(
         'SUMMARY',
         $name);
     }
 
     $description = $event->getDescription();
-    if (strlen($description)) {
+    if (@strlen($description)) {
       $properties[] = $this->newTextProperty(
         'DESCRIPTION',
         $description);
@@ -364,7 +364,7 @@
 
         // RFC5545 says that we MUST quote it if it has a colon, a semicolon,
         // or a comma, and that we MUST quote it if it's a URI.
-        if (!preg_match('/^[A-Za-z0-9-]*\z/', $v)) {
+        if (!@preg_match('/^[A-Za-z0-9-]*\z/', $v)) {
           $v = '"'.$v.'"';
         }
 
diff --git a/src/applications/calendar/phid/PhabricatorCalendarEventPHIDType.php b/src/applications/calendar/phid/PhabricatorCalendarEventPHIDType.php
--- a/src/applications/calendar/phid/PhabricatorCalendarEventPHIDType.php
+++ b/src/applications/calendar/phid/PhabricatorCalendarEventPHIDType.php
@@ -48,7 +48,7 @@
   }
 
   public function canLoadNamedObject($name) {
-    return preg_match('/^E[1-9]\d*$/i', $name);
+    return @preg_match('/^E[1-9]\d*$/i', $name);
   }
 
   public function loadNamedObjects(
@@ -57,7 +57,7 @@
 
     $id_map = array();
     foreach ($names as $name) {
-      $id = (int)substr($name, 1);
+      $id = (int)@substr($name, 1);
       $id_map[$id][] = $name;
     }
 
diff --git a/src/applications/calendar/storage/PhabricatorCalendarImport.php b/src/applications/calendar/storage/PhabricatorCalendarImport.php
--- a/src/applications/calendar/storage/PhabricatorCalendarImport.php
+++ b/src/applications/calendar/storage/PhabricatorCalendarImport.php
@@ -87,7 +87,7 @@
 
   public function getDisplayName() {
     $name = $this->getName();
-    if (strlen($name)) {
+    if (@strlen($name)) {
       return $name;
     }
 
diff --git a/src/applications/calendar/util/CalendarTimeUtil.php b/src/applications/calendar/util/CalendarTimeUtil.php
--- a/src/applications/calendar/util/CalendarTimeUtil.php
+++ b/src/applications/calendar/util/CalendarTimeUtil.php
@@ -71,7 +71,7 @@
     $today = new DateTime('@'.$today_epoch);
     $today->setTimezone($timezone);
 
-    if (strtolower($start_day_str) == 'today' ||
+    if (@strtolower($start_day_str) == 'today' ||
         $today->format('l') == $start_day_str) {
       $start_day = clone $today;
     } else {
diff --git a/src/applications/calendar/xaction/PhabricatorCalendarImportICSFileTransaction.php b/src/applications/calendar/xaction/PhabricatorCalendarImportICSFileTransaction.php
--- a/src/applications/calendar/xaction/PhabricatorCalendarImportICSFileTransaction.php
+++ b/src/applications/calendar/xaction/PhabricatorCalendarImportICSFileTransaction.php
@@ -53,7 +53,7 @@
     $new_value = $object->getParameter(self::PARAMKEY_FILE);
     foreach ($xactions as $xaction) {
       $new_value = $xaction->getNewValue();
-      if (!strlen($new_value)) {
+      if (!@strlen($new_value)) {
         continue;
       }
 
diff --git a/src/applications/calendar/xaction/PhabricatorCalendarImportICSURITransaction.php b/src/applications/calendar/xaction/PhabricatorCalendarImportICSURITransaction.php
--- a/src/applications/calendar/xaction/PhabricatorCalendarImportICSURITransaction.php
+++ b/src/applications/calendar/xaction/PhabricatorCalendarImportICSURITransaction.php
@@ -45,7 +45,7 @@
     $new_value = $object->getParameter(self::PARAMKEY_URI);
     foreach ($xactions as $xaction) {
       $new_value = $xaction->getNewValue();
-      if (!strlen($new_value)) {
+      if (!@strlen($new_value)) {
         continue;
       }
 
@@ -63,7 +63,7 @@
       }
     }
 
-    if (!strlen($new_value)) {
+    if (!@strlen($new_value)) {
       $errors[] = $this->newRequiredError(
         pht('You must select an ".ics" URI to import.'));
     }
diff --git a/src/applications/calendar/xaction/PhabricatorCalendarImportNameTransaction.php b/src/applications/calendar/xaction/PhabricatorCalendarImportNameTransaction.php
--- a/src/applications/calendar/xaction/PhabricatorCalendarImportNameTransaction.php
+++ b/src/applications/calendar/xaction/PhabricatorCalendarImportNameTransaction.php
@@ -17,12 +17,12 @@
     $old = $this->getOldValue();
     $new = $this->getNewValue();
 
-    if (!strlen($old)) {
+    if (!@strlen($old)) {
       return pht(
         '%s named this import %s.',
         $this->renderAuthor(),
         $this->renderNewValue());
-    } else if (!strlen($new)) {
+    } else if (!@strlen($new)) {
       return pht(
         '%s removed the name of this import (was: %s).',
         $this->renderAuthor(),
diff --git a/src/applications/celerity/CelerityResourceMapGenerator.php b/src/applications/celerity/CelerityResourceMapGenerator.php
--- a/src/applications/celerity/CelerityResourceMapGenerator.php
+++ b/src/applications/celerity/CelerityResourceMapGenerator.php
@@ -221,7 +221,7 @@
     $parser = new PhutilDocblockParser();
 
     $matches = array();
-    $ok = preg_match('@/[*][*].*?[*]/@s', $data, $matches);
+    $ok = @preg_match('@/[*][*].*?[*]/@s', $data, $matches);
     if (!$ok) {
       throw new Exception(
         pht(
@@ -401,7 +401,7 @@
 
     $hash = PhabricatorHash::digestHMACSHA256($data, 'celerity-resource-data');
 
-    return substr($hash, 0, 8);
+    return @substr($hash, 0, 8);
   }
 
 }
diff --git a/src/applications/celerity/CelerityResourceTransformer.php b/src/applications/celerity/CelerityResourceTransformer.php
--- a/src/applications/celerity/CelerityResourceTransformer.php
+++ b/src/applications/celerity/CelerityResourceTransformer.php
@@ -68,7 +68,7 @@
 
     // Some resources won't survive minification (like d3.min.js), and are
     // marked so as not to be minified.
-    if (strpos($data, '@'.'do-not-minify') !== false) {
+    if (@strpos($data, '@'.'do-not-minify') !== false) {
       return $data;
     }
 
@@ -114,7 +114,7 @@
   }
 
   public static function getResourceType($path) {
-    return last(explode('.', $path));
+    return last(@explode('.', $path));
   }
 
   public function translateResourceURI(array $matches) {
@@ -232,7 +232,7 @@
    * @return string|null Data URI, or null if we declined to generate one.
    */
   private function generateDataURI($resource_name) {
-    $ext = last(explode('.', $resource_name));
+    $ext = last(@explode('.', $resource_name));
     switch ($ext) {
       case 'png':
         $type = 'image/png';
@@ -251,14 +251,14 @@
     $maximum_data_size = (1024 * 32);
 
     $data = $this->celerityMap->getResourceDataForName($resource_name);
-    if (strlen($data) >= $maximum_data_size) {
+    if (@strlen($data) >= $maximum_data_size) {
       // If the data is already too large on its own, just bail before
       // encoding it.
       return null;
     }
 
     $uri = 'data:'.$type.';base64,'.base64_encode($data);
-    if (strlen($uri) >= $maximum_data_size) {
+    if (@strlen($uri) >= $maximum_data_size) {
       return null;
     }
 
diff --git a/src/applications/celerity/CeleritySpriteGenerator.php b/src/applications/celerity/CeleritySpriteGenerator.php
--- a/src/applications/celerity/CeleritySpriteGenerator.php
+++ b/src/applications/celerity/CeleritySpriteGenerator.php
@@ -78,7 +78,7 @@
 
     $images = Filesystem::listDirectory($path, $include_hidden = false);
     foreach ($images as $image) {
-      if (!preg_match('/\.png$/', $image)) {
+      if (!@preg_match('/\.png$/', $image)) {
         throw new Exception(
           pht(
             "Expected file '%s' in '%s' to be a sprite source ending in '%s'.",
@@ -86,7 +86,7 @@
             $path,
             '.png'));
       }
-      $result[] = substr($image, 0, -4);
+      $result[] = @substr($image, 0, -4);
     }
 
     return $result;
diff --git a/src/applications/celerity/CelerityStaticResourceResponse.php b/src/applications/celerity/CelerityStaticResourceResponse.php
--- a/src/applications/celerity/CelerityStaticResourceResponse.php
+++ b/src/applications/celerity/CelerityStaticResourceResponse.php
@@ -299,7 +299,7 @@
           'Literal %s is not allowed inside inline script.',
           '</script>'));
     }
-    if (strpos($data, '<!') !== false) {
+    if (@strpos($data, '<!') !== false) {
       throw new Exception(
         pht(
           'Literal %s is not allowed inside inline script.',
diff --git a/src/applications/celerity/controller/CelerityResourceController.php b/src/applications/celerity/controller/CelerityResourceController.php
--- a/src/applications/celerity/controller/CelerityResourceController.php
+++ b/src/applications/celerity/controller/CelerityResourceController.php
@@ -30,7 +30,7 @@
 
     // Sanity checking to keep this from exposing anything sensitive, since it
     // ultimately boils down to disk reads.
-    if (preg_match('@(//|\.\.)@', $path)) {
+    if (@preg_match('@(//|\.\.)@', $path)) {
       return new Aphront400Response();
     }
 
@@ -113,16 +113,16 @@
 
     $range = AphrontRequest::getHTTPHeader('Range');
 
-    if (strlen($range)) {
-      $response->setContentLength(strlen($data));
+    if (@strlen($range)) {
+      $response->setContentLength(@strlen($data));
 
       list($range_begin, $range_end) = $response->parseHTTPRange($range);
 
       if ($range_begin !== null) {
         if ($range_end !== null) {
-          $data = substr($data, $range_begin, ($range_end - $range_begin));
+          $data = @substr($data, $range_begin, ($range_end - $range_begin));
         } else {
-          $data = substr($data, $range_begin);
+          $data = @substr($data, $range_begin);
         }
       }
 
diff --git a/src/applications/celerity/resources/CelerityPhysicalResources.php b/src/applications/celerity/resources/CelerityPhysicalResources.php
--- a/src/applications/celerity/resources/CelerityPhysicalResources.php
+++ b/src/applications/celerity/resources/CelerityPhysicalResources.php
@@ -31,7 +31,7 @@
       foreach ($resources_list as $resources) {
         $name = $resources->getName();
 
-        if (!preg_match('/^[a-z0-9]+/', $name)) {
+        if (!@preg_match('/^[a-z0-9]+/', $name)) {
           throw new Exception(
             pht(
               'Resources name "%s" is not valid; it must contain only '.
diff --git a/src/applications/conduit/controller/PhabricatorConduitAPIController.php b/src/applications/conduit/controller/PhabricatorConduitAPIController.php
--- a/src/applications/conduit/controller/PhabricatorConduitAPIController.php
+++ b/src/applications/conduit/controller/PhabricatorConduitAPIController.php
@@ -290,9 +290,9 @@
     }
 
     $token_string = idx($metadata, 'token');
-    if (strlen($token_string)) {
+    if (@strlen($token_string)) {
 
-      if (strlen($token_string) != 32) {
+      if (@strlen($token_string) != 32) {
         return array(
           'ERR-INVALID-AUTH',
           pht(
@@ -302,7 +302,7 @@
         );
       }
 
-      $type = head(explode('-', $token_string));
+      $type = head(@explode('-', $token_string));
       $valid_types = PhabricatorConduitToken::getAllTokenTypes();
       $valid_types = array_fuse($valid_types);
       if (empty($valid_types[$type])) {
@@ -654,7 +654,7 @@
           $value = 'null';
         }
         $decoded_value = json_decode($value, true);
-        if ($decoded_value === null && strtolower($value) != 'null') {
+        if ($decoded_value === null && @strtolower($value) != 'null') {
           // When json_decode() fails, it returns null. This almost certainly
           // indicates that a user was using the web UI and didn't put quotes
           // around a string value. We can either do what we think they meant
@@ -683,7 +683,7 @@
     // Otherwise, look for a single parameter called 'params' which has the
     // entire param dictionary JSON encoded.
     $params_json = $request->getStr('params');
-    if (strlen($params_json)) {
+    if (@strlen($params_json)) {
       $params = null;
       try {
         $params = phutil_json_decode($params_json);
diff --git a/src/applications/conduit/management/PhabricatorConduitCallManagementWorkflow.php b/src/applications/conduit/management/PhabricatorConduitCallManagementWorkflow.php
--- a/src/applications/conduit/management/PhabricatorConduitCallManagementWorkflow.php
+++ b/src/applications/conduit/management/PhabricatorConduitCallManagementWorkflow.php
@@ -41,19 +41,19 @@
     $viewer = $this->getViewer();
 
     $method = $args->getArg('method');
-    if (!strlen($method)) {
+    if (!@strlen($method)) {
       throw new PhutilArgumentUsageException(
         pht('Specify a method to call with "--method".'));
     }
 
     $input = $args->getArg('input');
-    if (!strlen($input)) {
+    if (!@strlen($input)) {
       throw new PhutilArgumentUsageException(
         pht('Specify a file to read parameters from with "--input".'));
     }
 
     $as = $args->getArg('as');
-    if (strlen($as)) {
+    if (@strlen($as)) {
       $actor = id(new PhabricatorPeopleQuery())
         ->setViewer($viewer)
         ->withUsernames(array($as))
diff --git a/src/applications/conduit/method/ConduitAPIMethod.php b/src/applications/conduit/method/ConduitAPIMethod.php
--- a/src/applications/conduit/method/ConduitAPIMethod.php
+++ b/src/applications/conduit/method/ConduitAPIMethod.php
@@ -151,7 +151,7 @@
     );
     $ord = idx($map, $this->getMethodStatus(), 0);
 
-    list($head, $tail) = explode('.', $name, 2);
+    list($head, $tail) = @explode('.', $name, 2);
 
     return "{$head}.{$ord}.{$tail}";
   }
@@ -167,7 +167,7 @@
   }
 
   public function getApplicationName() {
-    return head(explode('.', $this->getAPIMethodName(), 2));
+    return head(@explode('.', $this->getAPIMethodName(), 2));
   }
 
   public static function loadAllConduitMethods() {
@@ -221,7 +221,7 @@
   public static function getParameterMetadataKey($key) {
     if (strncmp($key, 'api.', 4) === 0) {
       // All keys passed beginning with "api." are always metadata keys.
-      return substr($key, 4);
+      return @substr($key, 4);
     } else {
       switch ($key) {
         // These are real keys which always belong to request metadata.
diff --git a/src/applications/conduit/query/PhabricatorConduitMethodQuery.php b/src/applications/conduit/query/PhabricatorConduitMethodQuery.php
--- a/src/applications/conduit/query/PhabricatorConduitMethodQuery.php
+++ b/src/applications/conduit/query/PhabricatorConduitMethodQuery.php
@@ -87,7 +87,7 @@
       foreach ($methods as $key => $method) {
         $haystack = $method->getAPIMethodName();
         $haystack = phutil_utf8_strtolower($haystack);
-        if (strpos($haystack, $needle) === false) {
+        if (@strpos($haystack, $needle) === false) {
           unset($methods[$key]);
         }
       }
diff --git a/src/applications/conduit/query/PhabricatorConduitSearchEngine.php b/src/applications/conduit/query/PhabricatorConduitSearchEngine.php
--- a/src/applications/conduit/query/PhabricatorConduitSearchEngine.php
+++ b/src/applications/conduit/query/PhabricatorConduitSearchEngine.php
@@ -39,7 +39,7 @@
     $query->withIsInternal(false);
 
     $contains = $saved->getParameter('nameContains');
-    if (strlen($contains)) {
+    if (@strlen($contains)) {
       $query->withNameContains($contains);
     }
 
diff --git a/src/applications/conduit/storage/PhabricatorConduitToken.php b/src/applications/conduit/storage/PhabricatorConduitToken.php
--- a/src/applications/conduit/storage/PhabricatorConduitToken.php
+++ b/src/applications/conduit/storage/PhabricatorConduitToken.php
@@ -90,7 +90,7 @@
     $token->expires = $token->getTokenExpires($token_type);
 
     $secret = $token_type.'-'.Filesystem::readRandomCharacters(32);
-    $secret = substr($secret, 0, 32);
+    $secret = @substr($secret, 0, 32);
     $token->token = $secret;
 
     return $token;
@@ -134,7 +134,7 @@
       case self::TYPE_CLUSTER:
         return pht('Cluster API Token');
       default:
-        return substr($this->getToken(), 0, 8).'...';
+        return @substr($this->getToken(), 0, 8).'...';
     }
   }
 
diff --git a/src/applications/config/check/PhabricatorBaseURISetupCheck.php b/src/applications/config/check/PhabricatorBaseURISetupCheck.php
--- a/src/applications/config/check/PhabricatorBaseURISetupCheck.php
+++ b/src/applications/config/check/PhabricatorBaseURISetupCheck.php
@@ -10,8 +10,8 @@
     $base_uri = PhabricatorEnv::getEnvConfig('phabricator.base-uri');
 
     $host_header = AphrontRequest::getHTTPHeader('Host');
-    if (strpos($host_header, '.') === false) {
-      if (!strlen(trim($host_header))) {
+    if (@strpos($host_header, '.') === false) {
+      if (!@strlen(trim($host_header))) {
         $name = pht('No "Host" Header');
         $summary = pht('No "Host" header present in request.');
         $message = pht(
diff --git a/src/applications/config/check/PhabricatorBinariesSetupCheck.php b/src/applications/config/check/PhabricatorBinariesSetupCheck.php
--- a/src/applications/config/check/PhabricatorBinariesSetupCheck.php
+++ b/src/applications/config/check/PhabricatorBinariesSetupCheck.php
@@ -141,7 +141,7 @@
         $version_details = array();
 
         foreach ($bad_versions as $spec => $details) {
-          list($operator, $bad_version) = explode(' ', $spec, 2);
+          list($operator, $bad_version) = @explode(' ', $spec, 2);
           $is_bad = version_compare($version, $bad_version, $operator);
           if ($is_bad) {
             $version_details[] = pht(
diff --git a/src/applications/config/check/PhabricatorDaemonsSetupCheck.php b/src/applications/config/check/PhabricatorDaemonsSetupCheck.php
--- a/src/applications/config/check/PhabricatorDaemonsSetupCheck.php
+++ b/src/applications/config/check/PhabricatorDaemonsSetupCheck.php
@@ -54,7 +54,7 @@
     }
 
     $expect_user = PhabricatorEnv::getEnvConfig('phd.user');
-    if (strlen($expect_user)) {
+    if (@strlen($expect_user)) {
 
       try {
         $all_daemons = id(new PhabricatorDaemonLogQuery())
diff --git a/src/applications/config/check/PhabricatorDatabaseSetupCheck.php b/src/applications/config/check/PhabricatorDatabaseSetupCheck.php
--- a/src/applications/config/check/PhabricatorDatabaseSetupCheck.php
+++ b/src/applications/config/check/PhabricatorDatabaseSetupCheck.php
@@ -14,7 +14,7 @@
   protected function executeChecks() {
     $host = PhabricatorEnv::getEnvConfig('mysql.host');
     $matches = null;
-    if (preg_match('/^([^:]+):(\d+)$/', $host, $matches)) {
+    if (@preg_match('/^([^:]+):(\d+)$/', $host, $matches)) {
       $host = $matches[1];
       $port = $matches[2];
 
diff --git a/src/applications/config/check/PhabricatorMySQLSetupCheck.php b/src/applications/config/check/PhabricatorMySQLSetupCheck.php
--- a/src/applications/config/check/PhabricatorMySQLSetupCheck.php
+++ b/src/applications/config/check/PhabricatorMySQLSetupCheck.php
@@ -45,7 +45,7 @@
     }
 
     $modes = $ref->loadRawMySQLConfigValue('sql_mode');
-    $modes = explode(',', $modes);
+    $modes = @explode(',', $modes);
 
     if (!in_array('STRICT_ALL_TABLES', $modes)) {
       $summary = pht(
diff --git a/src/applications/config/check/PhabricatorPHPPreflightSetupCheck.php b/src/applications/config/check/PhabricatorPHPPreflightSetupCheck.php
--- a/src/applications/config/check/PhabricatorPHPPreflightSetupCheck.php
+++ b/src/applications/config/check/PhabricatorPHPPreflightSetupCheck.php
@@ -77,7 +77,7 @@
           $functions = preg_split('/[, ]+/', $disable_value);
           $functions = array_filter($functions);
           foreach ($functions as $k => $function) {
-            if (preg_match('/^pcntl_/', $function)) {
+            if (@preg_match('/^pcntl_/', $function)) {
               unset($functions[$k]);
             }
           }
@@ -121,7 +121,7 @@
     }
 
     $open_basedir = ini_get('open_basedir');
-    if (strlen($open_basedir)) {
+    if (@strlen($open_basedir)) {
       // If `open_basedir` is set, just fatal. It's technically possible for
       // us to run with certain values of `open_basedir`, but: we can only
       // raise fatal errors from preflight steps, so we'd have to do this check
diff --git a/src/applications/config/check/PhabricatorPathSetupCheck.php b/src/applications/config/check/PhabricatorPathSetupCheck.php
--- a/src/applications/config/check/PhabricatorPathSetupCheck.php
+++ b/src/applications/config/check/PhabricatorPathSetupCheck.php
@@ -43,10 +43,10 @@
     // Users are remarkably industrious at misconfiguring software. Try to
     // catch mistaken configuration of PATH.
 
-    $path_parts = explode(PATH_SEPARATOR, $path);
+    $path_parts = @explode(PATH_SEPARATOR, $path);
     $bad_paths = array();
     foreach ($path_parts as $path_part) {
-      if (!strlen($path_part)) {
+      if (!@strlen($path_part)) {
         continue;
       }
 
@@ -107,7 +107,7 @@
 
     if ($bad_paths) {
       foreach ($bad_paths as $path_part => $message) {
-        $digest = substr(PhabricatorHash::weakDigest($path_part), 0, 8);
+        $digest = @substr(PhabricatorHash::weakDigest($path_part), 0, 8);
 
         $this
           ->newIssue('config.PATH.'.$digest)
diff --git a/src/applications/config/check/PhabricatorSecuritySetupCheck.php b/src/applications/config/check/PhabricatorSecuritySetupCheck.php
--- a/src/applications/config/check/PhabricatorSecuritySetupCheck.php
+++ b/src/applications/config/check/PhabricatorSecuritySetupCheck.php
@@ -19,7 +19,7 @@
       ->setEnv($payload, $wipe_process_env = true)
       ->resolve();
 
-    if (!$err && preg_match('/VULNERABLE/', $stdout)) {
+    if (!$err && @preg_match('/VULNERABLE/', $stdout)) {
       $summary = pht(
         'This system has an unpatched version of Bash with a severe, widely '.
         'disclosed vulnerability.');
diff --git a/src/applications/config/check/PhabricatorSetupCheck.php b/src/applications/config/check/PhabricatorSetupCheck.php
--- a/src/applications/config/check/PhabricatorSetupCheck.php
+++ b/src/applications/config/check/PhabricatorSetupCheck.php
@@ -122,7 +122,7 @@
     $db_cache = new PhabricatorKeyValueDatabaseCache();
     try {
       $value = $db_cache->getKey('phabricator.setup.issue-keys');
-      if (!strlen($value)) {
+      if (!@strlen($value)) {
         return null;
       }
       return phutil_json_decode($value);
diff --git a/src/applications/config/check/PhabricatorStorageSetupCheck.php b/src/applications/config/check/PhabricatorStorageSetupCheck.php
--- a/src/applications/config/check/PhabricatorStorageSetupCheck.php
+++ b/src/applications/config/check/PhabricatorStorageSetupCheck.php
@@ -151,19 +151,19 @@
 
     $how_many = 0;
 
-    if (strlen($access_key)) {
+    if (@strlen($access_key)) {
       $how_many++;
     }
 
-    if (strlen($secret_key)) {
+    if (@strlen($secret_key)) {
       $how_many++;
     }
 
-    if (strlen($region)) {
+    if (@strlen($region)) {
       $how_many++;
     }
 
-    if (strlen($endpoint)) {
+    if (@strlen($endpoint)) {
       $how_many++;
     }
 
diff --git a/src/applications/config/check/PhabricatorWebServerSetupCheck.php b/src/applications/config/check/PhabricatorWebServerSetupCheck.php
--- a/src/applications/config/check/PhabricatorWebServerSetupCheck.php
+++ b/src/applications/config/check/PhabricatorWebServerSetupCheck.php
@@ -23,7 +23,7 @@
     }
 
     $base_uri = PhabricatorEnv::getEnvConfig('phabricator.base-uri');
-    if (!strlen($base_uri)) {
+    if (!@strlen($base_uri)) {
       // If `phabricator.base-uri` is not set then we can't really do
       // anything.
       return;
@@ -89,7 +89,7 @@
     try {
       list($body) = $ec2_future->resolvex();
       $body = trim($body);
-      if (preg_match('/^t2/', $body)) {
+      if (@preg_match('/^t2/', $body)) {
         $message = pht(
           'Phabricator appears to be installed on a very small EC2 instance '.
           '(of class "%s") with burstable CPU. This is strongly discouraged. '.
@@ -324,7 +324,7 @@
       '"Content-Encoding: gzip", but received different bytes than it '.
       'sent.');
 
-    $prefix_len = min(strlen($raw_body), strlen($uncompressed));
+    $prefix_len = min(@strlen($raw_body), @strlen($uncompressed));
     if ($prefix_len > 16 && !strncmp($raw_body, $uncompressed, $prefix_len)) {
       $message[] = pht(
         'The request body that the server received had already been '.
@@ -367,13 +367,13 @@
   }
 
   private function snipBytes($raw) {
-    if (!strlen($raw)) {
+    if (!@strlen($raw)) {
       $display = pht('<empty>');
     } else {
-      $snip = substr($raw, 0, 24);
+      $snip = @substr($raw, 0, 24);
       $display = phutil_loggable_string($snip);
 
-      if (strlen($snip) < strlen($raw)) {
+      if (@strlen($snip) < @strlen($raw)) {
         $display .= '...';
       }
     }
diff --git a/src/applications/config/controller/PhabricatorConfigConsoleController.php b/src/applications/config/controller/PhabricatorConfigConsoleController.php
--- a/src/applications/config/controller/PhabricatorConfigConsoleController.php
+++ b/src/applications/config/controller/PhabricatorConfigConsoleController.php
@@ -85,15 +85,15 @@
     $rows = array();
     foreach ($versions as $name => $info) {
       $branchpoint = $info['branchpoint'];
-      if (strlen($branchpoint)) {
-        $branchpoint = substr($branchpoint, 0, 12);
+      if (@strlen($branchpoint)) {
+        $branchpoint = @substr($branchpoint, 0, 12);
       } else {
         $branchpoint = null;
       }
 
       $version = $info['hash'];
-      if (strlen($version)) {
-        $version = substr($version, 0, 12);
+      if (@strlen($version)) {
+        $version = @substr($version, 0, 12);
       } else {
         $version = pht('Unknown');
       }
@@ -196,7 +196,7 @@
       foreach ($remotes as $remote) {
         $remote_pattern = '/^([^\t]+)\t([^ ]+) \(([^)]+)\)\z/';
         $matches = null;
-        if (!preg_match($remote_pattern, $remote, $matches)) {
+        if (!@preg_match($remote_pattern, $remote, $matches)) {
           continue;
         }
 
@@ -208,7 +208,7 @@
         }
 
         $uri = $matches[2];
-        $is_upstream = preg_match($upstream_pattern, $uri);
+        $is_upstream = @preg_match($upstream_pattern, $uri);
         if (!$is_upstream) {
           continue;
         }
@@ -252,7 +252,7 @@
     foreach ($log_futures as $lib => $future) {
       list($err, $stdout) = $future->resolve();
       if (!$err) {
-        list($hash, $epoch) = explode(' ', $stdout);
+        list($hash, $epoch) = @explode(' ', $stdout);
       } else {
         $hash = null;
         $epoch = null;
@@ -270,7 +270,7 @@
         list($err, $stdout) = $upstream_future->resolve();
         if (!$err) {
           $branchpoint = trim($stdout);
-          if (strlen($branchpoint)) {
+          if (@strlen($branchpoint)) {
             // We only list a branchpoint if it differs from HEAD.
             if ($branchpoint != $hash) {
               $result['upstream'] = $lib_upstreams[$lib];
diff --git a/src/applications/config/controller/module/PhabricatorConfigModuleController.php b/src/applications/config/controller/module/PhabricatorConfigModuleController.php
--- a/src/applications/config/controller/module/PhabricatorConfigModuleController.php
+++ b/src/applications/config/controller/module/PhabricatorConfigModuleController.php
@@ -9,7 +9,7 @@
 
     $all_modules = PhabricatorConfigModule::getAllModules();
 
-    if (!strlen($key)) {
+    if (!@strlen($key)) {
       $key = head_key($all_modules);
     }
 
diff --git a/src/applications/config/controller/services/PhabricatorConfigDatabaseStatusController.php b/src/applications/config/controller/services/PhabricatorConfigDatabaseStatusController.php
--- a/src/applications/config/controller/services/PhabricatorConfigDatabaseStatusController.php
+++ b/src/applications/config/controller/services/PhabricatorConfigDatabaseStatusController.php
@@ -837,7 +837,7 @@
 
     $parts = array();
     foreach ($properties as $key => $property) {
-      if (!strlen($property)) {
+      if (!@strlen($property)) {
         continue;
       }
 
diff --git a/src/applications/config/controller/settings/PhabricatorConfigSettingsListController.php b/src/applications/config/controller/settings/PhabricatorConfigSettingsListController.php
--- a/src/applications/config/controller/settings/PhabricatorConfigSettingsListController.php
+++ b/src/applications/config/controller/settings/PhabricatorConfigSettingsListController.php
@@ -7,7 +7,7 @@
     $viewer = $request->getViewer();
 
     $filter = $request->getURIData('filter');
-    if (!strlen($filter)) {
+    if (!@strlen($filter)) {
       $filter = 'settings';
     }
 
diff --git a/src/applications/config/custom/PhabricatorConfigJSONOptionType.php b/src/applications/config/custom/PhabricatorConfigJSONOptionType.php
--- a/src/applications/config/custom/PhabricatorConfigJSONOptionType.php
+++ b/src/applications/config/custom/PhabricatorConfigJSONOptionType.php
@@ -12,7 +12,7 @@
     $storage_value = $request->getStr('value');
     $display_value = $request->getStr('value');
 
-    if (strlen($display_value)) {
+    if (@strlen($display_value)) {
       try {
         $storage_value = phutil_json_decode($display_value);
         $this->validateOption($option, $storage_value);
diff --git a/src/applications/config/custom/PhabricatorConfigRegexOptionType.php b/src/applications/config/custom/PhabricatorConfigRegexOptionType.php
--- a/src/applications/config/custom/PhabricatorConfigRegexOptionType.php
+++ b/src/applications/config/custom/PhabricatorConfigRegexOptionType.php
@@ -5,7 +5,7 @@
 
   public function validateOption(PhabricatorConfigOption $option, $value) {
     foreach ($value as $pattern => $spec) {
-      $ok = preg_match($pattern, '');
+      $ok = @preg_match($pattern, '');
       if ($ok === false) {
         throw new Exception(
           pht(
diff --git a/src/applications/config/option/PhabricatorApplicationConfigOptions.php b/src/applications/config/option/PhabricatorApplicationConfigOptions.php
--- a/src/applications/config/option/PhabricatorApplicationConfigOptions.php
+++ b/src/applications/config/option/PhabricatorApplicationConfigOptions.php
@@ -79,10 +79,10 @@
   public function getKey() {
     $class = get_class($this);
     $matches = null;
-    if (preg_match('/^Phabricator(.*)ConfigOptions$/', $class, $matches)) {
-      return strtolower($matches[1]);
+    if (@preg_match('/^Phabricator(.*)ConfigOptions$/', $class, $matches)) {
+      return @strtolower($matches[1]);
     }
-    return strtolower(get_class($this));
+    return @strtolower(get_class($this));
   }
 
   final protected function newOption($key, $type, $default) {
diff --git a/src/applications/config/option/PhabricatorConfigOption.php b/src/applications/config/option/PhabricatorConfigOption.php
--- a/src/applications/config/option/PhabricatorConfigOption.php
+++ b/src/applications/config/option/PhabricatorConfigOption.php
@@ -189,7 +189,7 @@
       if (!$this->isCustomType()) {
         throw new Exception(pht('This option does not have a custom type!'));
       }
-      $this->customObject = newv(substr($this->getType(), 7), array());
+      $this->customObject = newv(@substr($this->getType(), 7), array());
     }
     return $this->customObject;
   }
@@ -205,7 +205,7 @@
 
   public function newDescriptionRemarkupView(PhabricatorUser $viewer) {
     $description = $this->getDescription();
-    if (!strlen($description)) {
+    if (!@strlen($description)) {
       return null;
     }
 
diff --git a/src/applications/config/option/PhabricatorCoreConfigOptions.php b/src/applications/config/option/PhabricatorCoreConfigOptions.php
--- a/src/applications/config/option/PhabricatorCoreConfigOptions.php
+++ b/src/applications/config/option/PhabricatorCoreConfigOptions.php
@@ -289,7 +289,7 @@
       }
 
       $domain = $uri->getDomain();
-      if (strpos($domain, '.') === false) {
+      if (@strpos($domain, '.') === false) {
         throw new PhabricatorConfigValidationException(
           pht(
             'Config option "%s" is invalid. The URI must contain a dot '.
diff --git a/src/applications/config/option/PhabricatorSecurityConfigOptions.php b/src/applications/config/option/PhabricatorSecurityConfigOptions.php
--- a/src/applications/config/option/PhabricatorSecurityConfigOptions.php
+++ b/src/applications/config/option/PhabricatorSecurityConfigOptions.php
@@ -310,7 +310,7 @@
       }
 
       $domain = $uri->getDomain();
-      if (strpos($domain, '.') === false) {
+      if (@strpos($domain, '.') === false) {
         throw new PhabricatorConfigValidationException(
           pht(
             "Config option '%s' is invalid. The URI must contain a dot ('.'), ".
diff --git a/src/applications/config/schema/PhabricatorConfigColumnSchema.php b/src/applications/config/schema/PhabricatorConfigColumnSchema.php
--- a/src/applications/config/schema/PhabricatorConfigColumnSchema.php
+++ b/src/applications/config/schema/PhabricatorConfigColumnSchema.php
@@ -103,7 +103,7 @@
     $type = $this->getColumnType();
 
     $matches = null;
-    if (preg_match('/^(?:var)?char\((\d+)\)$/', $type, $matches)) {
+    if (@preg_match('/^(?:var)?char\((\d+)\)$/', $type, $matches)) {
       // For utf8mb4, each character requires 4 bytes.
       $size = (int)$matches[1];
       if ($prefix && $prefix < $size) {
@@ -113,7 +113,7 @@
     }
 
     $matches = null;
-    if (preg_match('/^(?:var)?binary\((\d+)\)$/', $type, $matches)) {
+    if (@preg_match('/^(?:var)?binary\((\d+)\)$/', $type, $matches)) {
       // binary()/varbinary() store fixed-length binary data, so their size
       // is always the column size.
       $size = (int)$matches[1];
diff --git a/src/applications/config/schema/PhabricatorConfigKeySchema.php b/src/applications/config/schema/PhabricatorConfigKeySchema.php
--- a/src/applications/config/schema/PhabricatorConfigKeySchema.php
+++ b/src/applications/config/schema/PhabricatorConfigKeySchema.php
@@ -62,7 +62,7 @@
 
   public function getKeyColumnAndPrefix($column_name) {
     $matches = null;
-    if (preg_match('/^(.*)\((\d+)\)\z/', $column_name, $matches)) {
+    if (@preg_match('/^(.*)\((\d+)\)\z/', $column_name, $matches)) {
       return array($matches[1], (int)$matches[2]);
     } else {
       return array($column_name, null);
diff --git a/src/applications/config/schema/PhabricatorConfigSchemaQuery.php b/src/applications/config/schema/PhabricatorConfigSchemaQuery.php
--- a/src/applications/config/schema/PhabricatorConfigSchemaQuery.php
+++ b/src/applications/config/schema/PhabricatorConfigSchemaQuery.php
@@ -151,7 +151,7 @@
 
         $columns = idx($database_column_info, $table_name, array());
         foreach ($columns as $column) {
-          if (strpos($column['EXTRA'], 'auto_increment') === false) {
+          if (@strpos($column['EXTRA'], 'auto_increment') === false) {
             $auto_increment = false;
           } else {
             $auto_increment = true;
diff --git a/src/applications/config/schema/PhabricatorConfigSchemaSpec.php b/src/applications/config/schema/PhabricatorConfigSchemaSpec.php
--- a/src/applications/config/schema/PhabricatorConfigSchemaSpec.php
+++ b/src/applications/config/schema/PhabricatorConfigSchemaSpec.php
@@ -275,9 +275,9 @@
 
     // If the type ends with "?", make the column nullable.
     $nullable = false;
-    if (preg_match('/\?$/', $data_type)) {
+    if (@preg_match('/\?$/', $data_type)) {
       $nullable = true;
-      $data_type = substr($data_type, 0, -1);
+      $data_type = @substr($data_type, 0, -1);
     }
 
     // NOTE: MySQL allows fragments like "VARCHAR(32) CHARACTER SET binary",
@@ -287,7 +287,7 @@
     $is_binary = ($this->getUTF8Charset() == 'binary');
     $matches = null;
     $pattern = '/^(fulltext|sort|text|char)(\d+)?\z/';
-    if (preg_match($pattern, $data_type, $matches)) {
+    if (@preg_match($pattern, $data_type, $matches)) {
 
       // Limit the permitted column lengths under the theory that it would
       // be nice to eventually reduce this to a small set of standard lengths.
diff --git a/src/applications/config/type/PhabricatorBoolConfigType.php b/src/applications/config/type/PhabricatorBoolConfigType.php
--- a/src/applications/config/type/PhabricatorBoolConfigType.php
+++ b/src/applications/config/type/PhabricatorBoolConfigType.php
@@ -9,7 +9,7 @@
     PhabricatorConfigOption $option,
     $value) {
 
-    if (!preg_match('/^(true|false)\z/', $value)) {
+    if (!@preg_match('/^(true|false)\z/', $value)) {
       throw $this->newException(
         pht(
           'Value for option "%s" of type "%s" must be either '.
diff --git a/src/applications/config/type/PhabricatorIntConfigType.php b/src/applications/config/type/PhabricatorIntConfigType.php
--- a/src/applications/config/type/PhabricatorIntConfigType.php
+++ b/src/applications/config/type/PhabricatorIntConfigType.php
@@ -9,7 +9,7 @@
     PhabricatorConfigOption $option,
     $value) {
 
-    if (!preg_match('/^-?[0-9]+\z/', $value)) {
+    if (!@preg_match('/^-?[0-9]+\z/', $value)) {
       throw $this->newException(
         pht(
           'Value for option "%s" must be an integer.',
diff --git a/src/applications/config/type/PhabricatorRegexListConfigType.php b/src/applications/config/type/PhabricatorRegexListConfigType.php
--- a/src/applications/config/type/PhabricatorRegexListConfigType.php
+++ b/src/applications/config/type/PhabricatorRegexListConfigType.php
@@ -9,7 +9,7 @@
     PhabricatorConfigOption $option,
     $value) {
 
-    $ok = @preg_match($value, '');
+    $ok = @@preg_match($value, '');
     if ($ok === false) {
       throw $this->newException(
         pht(
diff --git a/src/applications/config/type/PhabricatorSetConfigType.php b/src/applications/config/type/PhabricatorSetConfigType.php
--- a/src/applications/config/type/PhabricatorSetConfigType.php
+++ b/src/applications/config/type/PhabricatorSetConfigType.php
@@ -16,7 +16,7 @@
 
     $value = preg_split('/[\n,]+/', $value);
     foreach ($value as $k => $v) {
-      if (!strlen($v)) {
+      if (!@strlen($v)) {
         unset($value[$k]);
       }
       $value[$k] = trim($v);
diff --git a/src/applications/config/type/PhabricatorTextConfigType.php b/src/applications/config/type/PhabricatorTextConfigType.php
--- a/src/applications/config/type/PhabricatorTextConfigType.php
+++ b/src/applications/config/type/PhabricatorTextConfigType.php
@@ -7,7 +7,7 @@
     PhabricatorConfigOption $option,
     AphrontRequest $request) {
     $value = parent::readValueFromRequest($option, $request);
-    return (bool)strlen($value);
+    return (bool)@strlen($value);
   }
 
   protected function newCanonicalValue(
diff --git a/src/applications/config/type/PhabricatorTextListConfigType.php b/src/applications/config/type/PhabricatorTextListConfigType.php
--- a/src/applications/config/type/PhabricatorTextListConfigType.php
+++ b/src/applications/config/type/PhabricatorTextListConfigType.php
@@ -14,7 +14,7 @@
 
     $value = phutil_split_lines($value, $retain_endings = false);
     foreach ($value as $k => $v) {
-      if (!strlen($v)) {
+      if (!@strlen($v)) {
         unset($value[$k]);
       }
     }
diff --git a/src/applications/config/view/PhabricatorSetupIssueView.php b/src/applications/config/view/PhabricatorSetupIssueView.php
--- a/src/applications/config/view/PhabricatorSetupIssueView.php
+++ b/src/applications/config/view/PhabricatorSetupIssueView.php
@@ -362,14 +362,14 @@
     $matches = null;
 
     $ini_loc = null;
-    if (preg_match($rex, $phpinfo, $matches)) {
+    if (@preg_match($rex, $phpinfo, $matches)) {
       $ini_loc = trim($matches[1]);
     }
 
     $rex = '@Additional \.ini files parsed\s*</td><td class="v">(.*?)</td>@i';
 
     $more_loc = array();
-    if (preg_match($rex, $phpinfo, $matches)) {
+    if (@preg_match($rex, $phpinfo, $matches)) {
       $more_loc = trim($matches[1]);
       if ($more_loc == '(none)') {
         $more_loc = array();
@@ -417,7 +417,7 @@
     $show_opcache = false;
 
     foreach ($configs as $key) {
-      if (preg_match('/^opcache\./', $key)) {
+      if (@preg_match('/^opcache\./', $key)) {
         $show_opcache = true;
       } else {
         $show_standard = true;
diff --git a/src/applications/conpherence/controller/ConpherenceController.php b/src/applications/conpherence/controller/ConpherenceController.php
--- a/src/applications/conpherence/controller/ConpherenceController.php
+++ b/src/applications/conpherence/controller/ConpherenceController.php
@@ -68,7 +68,7 @@
         ->setPolicyObject($conpherence)
         ->setImage($data['image']);
 
-      if (strlen($data['topic'])) {
+      if (@strlen($data['topic'])) {
         $topic = id(new PHUITagView())
           ->setName($data['topic'])
           ->setColor(PHUITagView::COLOR_VIOLET)
diff --git a/src/applications/conpherence/controller/ConpherenceUpdateController.php b/src/applications/conpherence/controller/ConpherenceUpdateController.php
--- a/src/applications/conpherence/controller/ConpherenceUpdateController.php
+++ b/src/applications/conpherence/controller/ConpherenceUpdateController.php
@@ -74,7 +74,7 @@
           break;
         case ConpherenceUpdateActions::MESSAGE:
           $message = $request->getStr('text');
-          if (strlen($message)) {
+          if (@strlen($message)) {
             $xactions = $editor->generateTransactionsFromText(
               $user,
               $conpherence,
diff --git a/src/applications/conpherence/editor/ConpherenceEditor.php b/src/applications/conpherence/editor/ConpherenceEditor.php
--- a/src/applications/conpherence/editor/ConpherenceEditor.php
+++ b/src/applications/conpherence/editor/ConpherenceEditor.php
@@ -46,7 +46,7 @@
             ConpherenceThreadTitleTransaction::TRANSACTIONTYPE)
           ->setNewValue($title);
       }
-      if (strlen($topic)) {
+      if (@strlen($topic)) {
         $xactions[] = id(new ConpherenceTransaction())
           ->setTransactionType(
             ConpherenceThreadTopicTransaction::TRANSACTIONTYPE)
diff --git a/src/applications/conpherence/mail/ConpherenceThreadMailReceiver.php b/src/applications/conpherence/mail/ConpherenceThreadMailReceiver.php
--- a/src/applications/conpherence/mail/ConpherenceThreadMailReceiver.php
+++ b/src/applications/conpherence/mail/ConpherenceThreadMailReceiver.php
@@ -13,7 +13,7 @@
   }
 
   protected function loadObject($pattern, PhabricatorUser $viewer) {
-    $id = (int)substr($pattern, 1);
+    $id = (int)@substr($pattern, 1);
 
     return id(new ConpherenceThreadQuery())
       ->setViewer($viewer)
diff --git a/src/applications/conpherence/phid/PhabricatorConpherenceThreadPHIDType.php b/src/applications/conpherence/phid/PhabricatorConpherenceThreadPHIDType.php
--- a/src/applications/conpherence/phid/PhabricatorConpherenceThreadPHIDType.php
+++ b/src/applications/conpherence/phid/PhabricatorConpherenceThreadPHIDType.php
@@ -41,7 +41,7 @@
   }
 
   public function canLoadNamedObject($name) {
-    return preg_match('/^Z\d*[1-9]\d*$/i', $name);
+    return @preg_match('/^Z\d*[1-9]\d*$/i', $name);
   }
 
   public function loadNamedObjects(
@@ -50,7 +50,7 @@
 
     $id_map = array();
     foreach ($names as $name) {
-      $id = (int)substr($name, 1);
+      $id = (int)@substr($name, 1);
       $id_map[$id][] = $name;
     }
 
diff --git a/src/applications/conpherence/query/ConpherenceFulltextQuery.php b/src/applications/conpherence/query/ConpherenceFulltextQuery.php
--- a/src/applications/conpherence/query/ConpherenceFulltextQuery.php
+++ b/src/applications/conpherence/query/ConpherenceFulltextQuery.php
@@ -55,7 +55,7 @@
         $this->previousTransactionPHIDs);
     }
 
-    if (strlen($this->fulltext)) {
+    if (@strlen($this->fulltext)) {
       $compiler = PhabricatorSearchDocument::newQueryCompiler();
       $tokens = $compiler->newTokens($this->fulltext);
       $compiled_query = $compiler->compileQuery($tokens);
@@ -70,7 +70,7 @@
   }
 
   private function buildOrderByClause(AphrontDatabaseConnection $conn_r) {
-    if (strlen($this->fulltext)) {
+    if (@strlen($this->fulltext)) {
       return qsprintf(
         $conn_r,
         'ORDER BY MATCH(i.corpus) AGAINST (%s IN BOOLEAN MODE) DESC',
diff --git a/src/applications/conpherence/query/ConpherenceThreadQuery.php b/src/applications/conpherence/query/ConpherenceThreadQuery.php
--- a/src/applications/conpherence/query/ConpherenceThreadQuery.php
+++ b/src/applications/conpherence/query/ConpherenceThreadQuery.php
@@ -135,7 +135,7 @@
   }
 
   protected function buildGroupClause(AphrontDatabaseConnection $conn_r) {
-    if ($this->participantPHIDs !== null || strlen($this->fulltext)) {
+    if ($this->participantPHIDs !== null || @strlen($this->fulltext)) {
       return qsprintf($conn_r, 'GROUP BY thread.id');
     } else {
       return $this->buildApplicationSearchGroupClause($conn_r);
@@ -152,7 +152,7 @@
         id(new ConpherenceParticipant())->getTableName());
     }
 
-    if (strlen($this->fulltext)) {
+    if (@strlen($this->fulltext)) {
       $joins[] = qsprintf(
         $conn,
         'JOIN %T idx ON idx.threadPHID = thread.phid',
@@ -234,7 +234,7 @@
         $this->participantPHIDs);
     }
 
-    if (strlen($this->fulltext)) {
+    if (@strlen($this->fulltext)) {
       $where[] = qsprintf(
         $conn,
         'MATCH(idx.corpus) AGAINST (%s IN BOOLEAN MODE)',
diff --git a/src/applications/conpherence/query/ConpherenceThreadSearchEngine.php b/src/applications/conpherence/query/ConpherenceThreadSearchEngine.php
--- a/src/applications/conpherence/query/ConpherenceThreadSearchEngine.php
+++ b/src/applications/conpherence/query/ConpherenceThreadSearchEngine.php
@@ -106,7 +106,7 @@
     $engines = array();
 
     $fulltext = $query->getParameter('fulltext');
-    if (strlen($fulltext) && $conpherences) {
+    if (@strlen($fulltext) && $conpherences) {
       $context = $this->loadContextMessages($conpherences, $fulltext);
 
       $author_phids = array();
@@ -151,7 +151,7 @@
       $icon = id(new PHUIIconView())
         ->setIcon($icon_name);
 
-      if (!strlen($fulltext)) {
+      if (!@strlen($fulltext)) {
         $item = id(new PHUIObjectItemView())
           ->setObjectName($conpherence->getMonogram())
           ->setHeader($title)
diff --git a/src/applications/conpherence/storage/ConpherenceThread.php b/src/applications/conpherence/storage/ConpherenceThread.php
--- a/src/applications/conpherence/storage/ConpherenceThread.php
+++ b/src/applications/conpherence/storage/ConpherenceThread.php
@@ -158,7 +158,7 @@
    */
   public function getStaticTitle() {
     $title = $this->getTitle();
-    if (strlen($title)) {
+    if (@strlen($title)) {
       return $title;
     }
 
diff --git a/src/applications/conpherence/typeahead/ConpherenceThreadDatasource.php b/src/applications/conpherence/typeahead/ConpherenceThreadDatasource.php
--- a/src/applications/conpherence/typeahead/ConpherenceThreadDatasource.php
+++ b/src/applications/conpherence/typeahead/ConpherenceThreadDatasource.php
@@ -27,7 +27,7 @@
 
     $results = array();
     foreach ($rooms as $room) {
-      if (strlen($room->getTopic())) {
+      if (@strlen($room->getTopic())) {
         $topic = $room->getTopic();
       } else {
         $topic = phutil_tag('em', array(), pht('No topic set'));
diff --git a/src/applications/conpherence/xaction/ConpherenceThreadTitleTransaction.php b/src/applications/conpherence/xaction/ConpherenceThreadTitleTransaction.php
--- a/src/applications/conpherence/xaction/ConpherenceThreadTitleTransaction.php
+++ b/src/applications/conpherence/xaction/ConpherenceThreadTitleTransaction.php
@@ -17,7 +17,7 @@
     $old = $this->getOldValue();
     $new = $this->getNewValue();
 
-    if (strlen($old) && strlen($new)) {
+    if (@strlen($old) && @strlen($new)) {
       return pht(
         '%s renamed this room from %s to %s.',
         $this->renderAuthor(),
@@ -34,7 +34,7 @@
     $old = $this->getOldValue();
     $new = $this->getNewValue();
 
-    if (strlen($old) && strlen($new)) {
+    if (@strlen($old) && @strlen($new)) {
       return pht(
         '%s renamed %s from %s to %s.',
         $this->renderAuthor(),
@@ -61,7 +61,7 @@
     $max_length = $object->getColumnMaximumByteLength('title');
     foreach ($xactions as $xaction) {
       $new_value = $xaction->getNewValue();
-      $new_length = strlen($new_value);
+      $new_length = @strlen($new_value);
       if ($new_length > $max_length) {
         $errors[] = $this->newInvalidError(
           pht('The title can be no longer than %s characters.',
diff --git a/src/applications/conpherence/xaction/ConpherenceThreadTopicTransaction.php b/src/applications/conpherence/xaction/ConpherenceThreadTopicTransaction.php
--- a/src/applications/conpherence/xaction/ConpherenceThreadTopicTransaction.php
+++ b/src/applications/conpherence/xaction/ConpherenceThreadTopicTransaction.php
@@ -17,7 +17,7 @@
     $old = $this->getOldValue();
     $new = $this->getNewValue();
 
-    if (strlen($new)) {
+    if (@strlen($new)) {
       return pht(
         '%s set the room topic to %s.',
         $this->renderAuthor(),
@@ -34,7 +34,7 @@
     $old = $this->getOldValue();
     $new = $this->getNewValue();
 
-    if (strlen($new)) {
+    if (@strlen($new)) {
       return pht(
         '%s set the room topic to %s in %s.',
         $this->renderAuthor(),
@@ -55,7 +55,7 @@
     $max_length = $object->getColumnMaximumByteLength('topic');
     foreach ($xactions as $xaction) {
       $new_value = $xaction->getNewValue();
-      $new_length = strlen($new_value);
+      $new_length = @strlen($new_value);
       if ($new_length > $max_length) {
         $errors[] = $this->newInvalidError(
           pht('The topic can be no longer than %s characters.',
diff --git a/src/applications/console/controller/DarkConsoleController.php b/src/applications/console/controller/DarkConsoleController.php
--- a/src/applications/console/controller/DarkConsoleController.php
+++ b/src/applications/console/controller/DarkConsoleController.php
@@ -26,7 +26,7 @@
     }
 
     $visible = $request->getStr('visible');
-    if (strlen($visible)) {
+    if (@strlen($visible)) {
       $this->writeDarkConsoleSetting(
         PhabricatorDarkConsoleVisibleSetting::SETTINGKEY,
         (int)$visible);
@@ -34,7 +34,7 @@
     }
 
     $tab = $request->getStr('tab');
-    if (strlen($tab)) {
+    if (@strlen($tab)) {
       $this->writeDarkConsoleSetting(
         PhabricatorDarkConsoleTabSetting::SETTINGKEY,
         $tab);
diff --git a/src/applications/console/controller/DarkConsoleDataController.php b/src/applications/console/controller/DarkConsoleDataController.php
--- a/src/applications/console/controller/DarkConsoleDataController.php
+++ b/src/applications/console/controller/DarkConsoleDataController.php
@@ -57,7 +57,7 @@
         // with the session cookie name anywhere in its name.
         $pattern = '('.preg_quote(PhabricatorCookies::COOKIE_SESSION).')';
         foreach ($_COOKIE as $cookie_name => $cookie_value) {
-          if (preg_match($pattern, $cookie_name)) {
+          if (@preg_match($pattern, $cookie_name)) {
             $panel = PhutilSafeHTML::applyFunction(
               'str_replace',
               $cookie_value,
diff --git a/src/applications/console/core/DarkConsoleCore.php b/src/applications/console/core/DarkConsoleCore.php
--- a/src/applications/console/core/DarkConsoleCore.php
+++ b/src/applications/console/core/DarkConsoleCore.php
@@ -126,10 +126,10 @@
     } else {
       // Truncate huge strings. Since the data doesn't really matter much,
       // just truncate bytes to avoid PhutilUTF8StringTruncator overhead.
-      $length = strlen($data);
+      $length = @strlen($data);
       $max = 4096;
       if ($length > $max) {
-        $data = substr($data, 0, $max).'...<'.$length.' bytes>...';
+        $data = @substr($data, 0, $max).'...<'.$length.' bytes>...';
       }
       return phutil_utf8ize($data);
     }
diff --git a/src/applications/console/plugin/DarkConsoleServicesPlugin.php b/src/applications/console/plugin/DarkConsoleServicesPlugin.php
--- a/src/applications/console/plugin/DarkConsoleServicesPlugin.php
+++ b/src/applications/console/plugin/DarkConsoleServicesPlugin.php
@@ -68,7 +68,7 @@
 
       // For each SELECT query, go issue an EXPLAIN on it so we can flag stuff
       // causing table scans, etc.
-      if (preg_match('/^\s*SELECT\b/i', $entry['query'])) {
+      if (@preg_match('/^\s*SELECT\b/i', $entry['query'])) {
         $conn = PhabricatorDatabaseRef::newRawConnection($entry['config']);
         try {
           $explain = queryfx_all(
@@ -109,7 +109,7 @@
                 $cur_reason = 'Fulltext';
                 break;
               case 'ALL':
-                if (preg_match('/Using where/', $table['Extra'])) {
+                if (@preg_match('/Using where/', $table['Extra'])) {
                   if ($table['rows'] < 256 && !empty($table['possible_keys'])) {
                     $cur_badness = 2;
                     $cur_reason = pht('Small Table Scan');
@@ -123,10 +123,10 @@
                 }
                 break;
               default:
-                if (preg_match('/No tables used/i', $table['Extra'])) {
+                if (@preg_match('/No tables used/i', $table['Extra'])) {
                   $cur_badness = 1;
                   $cur_reason = pht('No Tables');
-                } else if (preg_match('/Impossible/i', $table['Extra'])) {
+                } else if (@preg_match('/Impossible/i', $table['Extra'])) {
                   $cur_badness = 1;
                   $cur_reason = pht('Empty');
                 } else {
diff --git a/src/applications/countdown/editor/PhabricatorCountdownEditor.php b/src/applications/countdown/editor/PhabricatorCountdownEditor.php
--- a/src/applications/countdown/editor/PhabricatorCountdownEditor.php
+++ b/src/applications/countdown/editor/PhabricatorCountdownEditor.php
@@ -55,7 +55,7 @@
     $body = parent::buildMailBody($object, $xactions);
     $description = $object->getDescription();
 
-    if (strlen($description)) {
+    if (@strlen($description)) {
       $body->addRemarkupSection(
         pht('COUNTDOWN DESCRIPTION'),
         $object->getDescription());
diff --git a/src/applications/countdown/mail/PhabricatorCountdownMailReceiver.php b/src/applications/countdown/mail/PhabricatorCountdownMailReceiver.php
--- a/src/applications/countdown/mail/PhabricatorCountdownMailReceiver.php
+++ b/src/applications/countdown/mail/PhabricatorCountdownMailReceiver.php
@@ -13,7 +13,7 @@
   }
 
   protected function loadObject($pattern, PhabricatorUser $viewer) {
-    $id = (int)substr($pattern, 1);
+    $id = (int)@substr($pattern, 1);
 
     return id(new PhabricatorCountdownQuery())
       ->setViewer($viewer)
diff --git a/src/applications/countdown/phid/PhabricatorCountdownCountdownPHIDType.php b/src/applications/countdown/phid/PhabricatorCountdownCountdownPHIDType.php
--- a/src/applications/countdown/phid/PhabricatorCountdownCountdownPHIDType.php
+++ b/src/applications/countdown/phid/PhabricatorCountdownCountdownPHIDType.php
@@ -42,7 +42,7 @@
   }
 
   public function canLoadNamedObject($name) {
-    return preg_match('/^C\d*[1-9]\d*$/i', $name);
+    return @preg_match('/^C\d*[1-9]\d*$/i', $name);
   }
 
   public function loadNamedObjects(
@@ -51,7 +51,7 @@
 
     $id_map = array();
     foreach ($names as $name) {
-      $id = (int)substr($name, 1);
+      $id = (int)@substr($name, 1);
       $id_map[$id][] = $name;
     }
 
diff --git a/src/applications/countdown/view/PhabricatorCountdownView.php b/src/applications/countdown/view/PhabricatorCountdownView.php
--- a/src/applications/countdown/view/PhabricatorCountdownView.php
+++ b/src/applications/countdown/view/PhabricatorCountdownView.php
@@ -52,7 +52,7 @@
       $launch_date);
 
     $description = $countdown->getDescription();
-    if (strlen($description)) {
+    if (@strlen($description)) {
       $description = new PHUIRemarkupView($this->getUser(), $description);
       $description = phutil_tag(
         'div',
diff --git a/src/applications/countdown/xaction/PhabricatorCountdownTitleTransaction.php b/src/applications/countdown/xaction/PhabricatorCountdownTitleTransaction.php
--- a/src/applications/countdown/xaction/PhabricatorCountdownTitleTransaction.php
+++ b/src/applications/countdown/xaction/PhabricatorCountdownTitleTransaction.php
@@ -39,7 +39,7 @@
     $max_length = $object->getColumnMaximumByteLength('title');
     foreach ($xactions as $xaction) {
       $new_value = $xaction->getNewValue();
-      $new_length = strlen($new_value);
+      $new_length = @strlen($new_value);
       if ($new_length > $max_length) {
         $errors[] = $this->newInvalidError(
           pht(
diff --git a/src/applications/daemon/event/PhabricatorDaemonEventListener.php b/src/applications/daemon/event/PhabricatorDaemonEventListener.php
--- a/src/applications/daemon/event/PhabricatorDaemonEventListener.php
+++ b/src/applications/daemon/event/PhabricatorDaemonEventListener.php
@@ -64,7 +64,7 @@
     // removing Conduit.
     $message = $event->getValue('message');
     $context = $event->getValue('context');
-    if (strlen($context) && $context !== $message) {
+    if (@strlen($context) && $context !== $message) {
       $message = "({$context}) {$message}";
     }
 
diff --git a/src/applications/daemon/management/PhabricatorDaemonManagementWorkflow.php b/src/applications/daemon/management/PhabricatorDaemonManagementWorkflow.php
--- a/src/applications/daemon/management/PhabricatorDaemonManagementWorkflow.php
+++ b/src/applications/daemon/management/PhabricatorDaemonManagementWorkflow.php
@@ -42,7 +42,7 @@
     $match = array();
     foreach ($symbols as $symbol) {
       if (stripos($symbol, $substring) !== false) {
-        if (strtolower($symbol) == strtolower($substring)) {
+        if (@strtolower($symbol) == @strtolower($substring)) {
           $match = array($symbol);
           break;
         } else {
@@ -214,7 +214,7 @@
       // switch accounts without a password. This is not consistent with
       // sudo on Linux, and seems buggy/broken. Check for this by string
       // matching the output.
-      if (preg_match('/sudo: a password is required/', $stderr)) {
+      if (@preg_match('/sudo: a password is required/', $stderr)) {
         throw new Exception(
           pht(
             '%s exited with a zero exit code, but emitted output '.
@@ -572,7 +572,7 @@
       // We were given a PID or set of PIDs to kill.
       $select_pids = array();
       foreach ($pids as $key => $pid) {
-        if (!preg_match('/^\d+$/', $pid)) {
+        if (!@preg_match('/^\d+$/', $pid)) {
           $console->writeErr(pht("PID '%s' is not a valid PID.", $pid)."\n");
           continue;
         } else if (empty($running_pids[$pid])) {
diff --git a/src/applications/daemon/management/PhabricatorLockLogManagementWorkflow.php b/src/applications/daemon/management/PhabricatorLockLogManagementWorkflow.php
--- a/src/applications/daemon/management/PhabricatorLockLogManagementWorkflow.php
+++ b/src/applications/daemon/management/PhabricatorLockLogManagementWorkflow.php
@@ -38,7 +38,7 @@
     $with_name = $args->getArg('name');
 
     if ($is_enable || $is_disable) {
-      if (strlen($with_name)) {
+      if (@strlen($with_name)) {
         throw new PhutilArgumentUsageException(
           pht(
             'You can not both "--enable" or "--disable" with search '.
@@ -99,7 +99,7 @@
     $conn = $table->establishConnection('r');
 
     $parts = array();
-    if (strlen($with_name)) {
+    if (@strlen($with_name)) {
       $parts[] = qsprintf(
         $conn,
         'lockName = %s',
diff --git a/src/applications/daemon/view/PhabricatorDaemonTasksTableView.php b/src/applications/daemon/view/PhabricatorDaemonTasksTableView.php
--- a/src/applications/daemon/view/PhabricatorDaemonTasksTableView.php
+++ b/src/applications/daemon/view/PhabricatorDaemonTasksTableView.php
@@ -69,7 +69,7 @@
         'action',
       ));
 
-    if (strlen($this->getNoDataString())) {
+    if (@strlen($this->getNoDataString())) {
       $table->setNoDataString($this->getNoDataString());
     }
 
diff --git a/src/applications/dashboard/controller/PhabricatorDashboardQueryPanelInstallController.php b/src/applications/dashboard/controller/PhabricatorDashboardQueryPanelInstallController.php
--- a/src/applications/dashboard/controller/PhabricatorDashboardQueryPanelInstallController.php
+++ b/src/applications/dashboard/controller/PhabricatorDashboardQueryPanelInstallController.php
@@ -13,12 +13,12 @@
     $e_name = true;
 
     $v_engine = $request->getStr('engine');
-    if (!strlen($v_engine)) {
+    if (!@strlen($v_engine)) {
       $v_engine = $request->getURIData('engineKey');
     }
 
     $v_query = $request->getStr('query');
-    if (!strlen($v_query)) {
+    if (!@strlen($v_query)) {
       $v_query = $request->getURIData('queryKey');
     }
 
diff --git a/src/applications/dashboard/controller/dashboard/PhabricatorDashboardAdjustController.php b/src/applications/dashboard/controller/dashboard/PhabricatorDashboardAdjustController.php
--- a/src/applications/dashboard/controller/dashboard/PhabricatorDashboardAdjustController.php
+++ b/src/applications/dashboard/controller/dashboard/PhabricatorDashboardAdjustController.php
@@ -32,7 +32,7 @@
 
     $panel_ref = null;
     $panel_key = $request->getStr('panelKey');
-    if (strlen($panel_key)) {
+    if (@strlen($panel_key)) {
       $panel_ref = $ref_list->getPanelRef($panel_key);
       if (!$panel_ref) {
         return new Aphront404Response();
@@ -42,7 +42,7 @@
     }
 
     $column_key = $request->getStr('columnKey');
-    if (strlen($column_key)) {
+    if (@strlen($column_key)) {
       $columns = $ref_list->getColumns();
       if (!isset($columns[$column_key])) {
         return new Aphront404Response();
@@ -52,7 +52,7 @@
 
     $after_ref = null;
     $after_key = $request->getStr('afterKey');
-    if (strlen($after_key)) {
+    if (@strlen($after_key)) {
       $after_ref = $ref_list->getPanelRef($after_key);
       if (!$after_ref) {
         return new Aphront404Response();
diff --git a/src/applications/dashboard/controller/panel/PhabricatorDashboardPanelEditController.php b/src/applications/dashboard/controller/panel/PhabricatorDashboardPanelEditController.php
--- a/src/applications/dashboard/controller/panel/PhabricatorDashboardPanelEditController.php
+++ b/src/applications/dashboard/controller/panel/PhabricatorDashboardPanelEditController.php
@@ -15,7 +15,7 @@
     // editing.
 
     $context_phid = $request->getStr('contextPHID');
-    if (strlen($context_phid)) {
+    if (@strlen($context_phid)) {
       $context = id(new PhabricatorObjectQuery())
         ->setViewer($viewer)
         ->withPHIDs(array($context_phid))
diff --git a/src/applications/dashboard/controller/panel/PhabricatorDashboardPanelTabsController.php b/src/applications/dashboard/controller/panel/PhabricatorDashboardPanelTabsController.php
--- a/src/applications/dashboard/controller/panel/PhabricatorDashboardPanelTabsController.php
+++ b/src/applications/dashboard/controller/panel/PhabricatorDashboardPanelTabsController.php
@@ -41,12 +41,12 @@
 
     $op = $request->getURIData('op');
     $after = $request->getStr('after');
-    if (!strlen($after)) {
+    if (!@strlen($after)) {
       $after = null;
     }
 
     $target = $request->getStr('target');
-    if (!strlen($target)) {
+    if (!@strlen($target)) {
       $target = null;
     }
 
@@ -103,7 +103,7 @@
 
     $context_phid = $request->getStr('contextPHID');
     $context = null;
-    if (strlen($context_phid)) {
+    if (@strlen($context_phid)) {
       $context = id(new PhabricatorObjectQuery())
         ->setViewer($viewer)
         ->withPHIDs(array($context_phid))
diff --git a/src/applications/dashboard/editfield/PhabricatorDashboardQueryPanelApplicationEditField.php b/src/applications/dashboard/editfield/PhabricatorDashboardQueryPanelApplicationEditField.php
--- a/src/applications/dashboard/editfield/PhabricatorDashboardQueryPanelApplicationEditField.php
+++ b/src/applications/dashboard/editfield/PhabricatorDashboardQueryPanelApplicationEditField.php
@@ -26,7 +26,7 @@
     $options = array();
 
     $value = $this->getValueForControl();
-    if (strlen($value) && empty($engines[$value])) {
+    if (@strlen($value) && empty($engines[$value])) {
       $options[$value] = $value;
     }
 
diff --git a/src/applications/dashboard/editfield/PhabricatorDashboardQueryPanelQueryEditField.php b/src/applications/dashboard/editfield/PhabricatorDashboardQueryPanelQueryEditField.php
--- a/src/applications/dashboard/editfield/PhabricatorDashboardQueryPanelQueryEditField.php
+++ b/src/applications/dashboard/editfield/PhabricatorDashboardQueryPanelQueryEditField.php
@@ -38,7 +38,7 @@
       }
     }
 
-    if (strlen($value) && !$seen) {
+    if (@strlen($value) && !$seen) {
       $name = pht('Custom Query ("%s")', $value);
     } else {
       $name = pht('(None)');
@@ -56,7 +56,7 @@
         'queryID' => $control_id,
         'options' => $queries,
         'value' => array(
-          'key' => strlen($value) ? $value : null,
+          'key' => @strlen($value) ? $value : null,
           'name' => $name,
         ),
       ));
diff --git a/src/applications/dashboard/install/PhabricatorDashboardObjectInstallWorkflow.php b/src/applications/dashboard/install/PhabricatorDashboardObjectInstallWorkflow.php
--- a/src/applications/dashboard/install/PhabricatorDashboardObjectInstallWorkflow.php
+++ b/src/applications/dashboard/install/PhabricatorDashboardObjectInstallWorkflow.php
@@ -17,16 +17,16 @@
       $target_identifier = head($target_tokens);
     }
 
-    if (!strlen($target_identifier)) {
+    if (!@strlen($target_identifier)) {
       $target_identifier = $request->getStr('target');
     }
 
-    if (!strlen($target_identifier)) {
+    if (!@strlen($target_identifier)) {
       $target_identifier = $this->getMode();
     }
 
     $target = null;
-    if (strlen($target_identifier)) {
+    if (@strlen($target_identifier)) {
       $targets = array();
 
       if (ctype_digit($target_identifier)) {
@@ -74,7 +74,7 @@
     }
 
     $errors = array();
-    if (strlen($target_identifier)) {
+    if (@strlen($target_identifier)) {
       if (!$target) {
         $errors[] = pht('Choose a valid object.');
       } else if (!$can_edit) {
diff --git a/src/applications/dashboard/layoutconfig/PhabricatorDashboardPanelRefList.php b/src/applications/dashboard/layoutconfig/PhabricatorDashboardPanelRefList.php
--- a/src/applications/dashboard/layoutconfig/PhabricatorDashboardPanelRefList.php
+++ b/src/applications/dashboard/layoutconfig/PhabricatorDashboardPanelRefList.php
@@ -31,12 +31,12 @@
     $refs = array();
     foreach ($panels as $panel) {
       $panel_phid = idx($panel, 'panelPHID');
-      if (!strlen($panel_phid)) {
+      if (!@strlen($panel_phid)) {
         continue;
       }
 
       $panel_key = idx($panel, 'panelKey');
-      if (!strlen($panel_key)) {
+      if (!@strlen($panel_key)) {
         continue;
       }
 
diff --git a/src/applications/dashboard/menuitem/PhabricatorDashboardPortalMenuItem.php b/src/applications/dashboard/menuitem/PhabricatorDashboardPortalMenuItem.php
--- a/src/applications/dashboard/menuitem/PhabricatorDashboardPortalMenuItem.php
+++ b/src/applications/dashboard/menuitem/PhabricatorDashboardPortalMenuItem.php
@@ -31,7 +31,7 @@
     PhabricatorProfileMenuItemConfiguration $config) {
     $name = $config->getMenuItemProperty('name');
 
-    if (strlen($name)) {
+    if (@strlen($name)) {
       return $name;
     }
 
diff --git a/src/applications/dashboard/paneltype/PhabricatorDashboardTabsPanelType.php b/src/applications/dashboard/paneltype/PhabricatorDashboardTabsPanelType.php
--- a/src/applications/dashboard/paneltype/PhabricatorDashboardTabsPanelType.php
+++ b/src/applications/dashboard/paneltype/PhabricatorDashboardTabsPanelType.php
@@ -101,13 +101,13 @@
       $subpanel = idx($panels, $panel_id);
 
       $name = idx($tab_spec, 'name');
-      if (!strlen($name)) {
+      if (!@strlen($name)) {
         if ($subpanel) {
           $name = $subpanel->getName();
         }
       }
 
-      if (!strlen($name)) {
+      if (!@strlen($name)) {
         $name = pht('Unnamed Tab');
       }
 
diff --git a/src/applications/dashboard/phid/PhabricatorDashboardPanelPHIDType.php b/src/applications/dashboard/phid/PhabricatorDashboardPanelPHIDType.php
--- a/src/applications/dashboard/phid/PhabricatorDashboardPanelPHIDType.php
+++ b/src/applications/dashboard/phid/PhabricatorDashboardPanelPHIDType.php
@@ -48,7 +48,7 @@
   }
 
   public function canLoadNamedObject($name) {
-    return preg_match('/^W\d*[1-9]\d*$/i', $name);
+    return @preg_match('/^W\d*[1-9]\d*$/i', $name);
   }
 
   public function loadNamedObjects(
@@ -57,7 +57,7 @@
 
     $id_map = array();
     foreach ($names as $name) {
-      $id = (int)substr($name, 1);
+      $id = (int)@substr($name, 1);
       $id_map[$id][] = $name;
     }
 
diff --git a/src/applications/dashboard/typeahead/PhabricatorDashboardPanelDatasource.php b/src/applications/dashboard/typeahead/PhabricatorDashboardPanelDatasource.php
--- a/src/applications/dashboard/typeahead/PhabricatorDashboardPanelDatasource.php
+++ b/src/applications/dashboard/typeahead/PhabricatorDashboardPanelDatasource.php
@@ -28,7 +28,7 @@
     $query = new PhabricatorDashboardPanelQuery();
 
     $raw_query = $this->getRawQuery();
-    if (preg_match('/^[wW]\d+\z/', $raw_query)) {
+    if (@preg_match('/^[wW]\d+\z/', $raw_query)) {
       $id = trim($raw_query, 'wW');
       $id = (int)$id;
       $query->withIDs(array($id));
diff --git a/src/applications/dashboard/xaction/dashboard/PhabricatorDashboardNameTransaction.php b/src/applications/dashboard/xaction/dashboard/PhabricatorDashboardNameTransaction.php
--- a/src/applications/dashboard/xaction/dashboard/PhabricatorDashboardNameTransaction.php
+++ b/src/applications/dashboard/xaction/dashboard/PhabricatorDashboardNameTransaction.php
@@ -30,14 +30,14 @@
     $max_length = $object->getColumnMaximumByteLength('name');
     foreach ($xactions as $xaction) {
       $new = $xaction->getNewValue();
-      if (!strlen($new)) {
+      if (!@strlen($new)) {
         $errors[] = $this->newInvalidError(
           pht('Dashboards must have a name.'),
           $xaction);
         continue;
       }
 
-      if (strlen($new) > $max_length) {
+      if (@strlen($new) > $max_length) {
         $errors[] = $this->newInvalidError(
           pht(
             'Dashboard names must not be longer than %s characters.',
diff --git a/src/applications/dashboard/xaction/dashboard/PhabricatorDashboardPanelsTransaction.php b/src/applications/dashboard/xaction/dashboard/PhabricatorDashboardPanelsTransaction.php
--- a/src/applications/dashboard/xaction/dashboard/PhabricatorDashboardPanelsTransaction.php
+++ b/src/applications/dashboard/xaction/dashboard/PhabricatorDashboardPanelsTransaction.php
@@ -79,7 +79,7 @@
 
         $panel_key = $spec['panelKey'];
 
-        if (!strlen($panel_key)) {
+        if (!@strlen($panel_key)) {
           $errors[] = $this->newInvalidError(
             pht(
               'Panel specification at index "%s" has bad panel key "%s". '.
diff --git a/src/applications/dashboard/xaction/panel/PhabricatorDashboardPanelNameTransaction.php b/src/applications/dashboard/xaction/panel/PhabricatorDashboardPanelNameTransaction.php
--- a/src/applications/dashboard/xaction/panel/PhabricatorDashboardPanelNameTransaction.php
+++ b/src/applications/dashboard/xaction/panel/PhabricatorDashboardPanelNameTransaction.php
@@ -30,14 +30,14 @@
     $max_length = $object->getColumnMaximumByteLength('name');
     foreach ($xactions as $xaction) {
       $new = $xaction->getNewValue();
-      if (!strlen($new)) {
+      if (!@strlen($new)) {
         $errors[] = $this->newInvalidError(
           pht('Panels must have a title.'),
           $xaction);
         continue;
       }
 
-      if (strlen($new) > $max_length) {
+      if (@strlen($new) > $max_length) {
         $errors[] = $this->newInvalidError(
           pht(
             'Panel names must not be longer than %s characters.',
diff --git a/src/applications/dashboard/xaction/portal/PhabricatorDashboardPortalNameTransaction.php b/src/applications/dashboard/xaction/portal/PhabricatorDashboardPortalNameTransaction.php
--- a/src/applications/dashboard/xaction/portal/PhabricatorDashboardPortalNameTransaction.php
+++ b/src/applications/dashboard/xaction/portal/PhabricatorDashboardPortalNameTransaction.php
@@ -30,14 +30,14 @@
     $max_length = $object->getColumnMaximumByteLength('name');
     foreach ($xactions as $xaction) {
       $new = $xaction->getNewValue();
-      if (!strlen($new)) {
+      if (!@strlen($new)) {
         $errors[] = $this->newInvalidError(
           pht('Portals must have a title.'),
           $xaction);
         continue;
       }
 
-      if (strlen($new) > $max_length) {
+      if (@strlen($new) > $max_length) {
         $errors[] = $this->newInvalidError(
           pht(
             'Portal names must not be longer than %s characters.',
diff --git a/src/applications/differential/__tests__/DifferentialParseRenderTestCase.php b/src/applications/differential/__tests__/DifferentialParseRenderTestCase.php
--- a/src/applications/differential/__tests__/DifferentialParseRenderTestCase.php
+++ b/src/applications/differential/__tests__/DifferentialParseRenderTestCase.php
@@ -9,7 +9,7 @@
   public function testParseRender() {
     $dir = $this->getTestDataDirectory();
     foreach (Filesystem::listDirectory($dir, $show_hidden = false) as $file) {
-      if (!preg_match('/\.diff$/', $file)) {
+      if (!@preg_match('/\.diff$/', $file)) {
         continue;
       }
       $data = Filesystem::readFile($dir.$file);
diff --git a/src/applications/differential/conduit/DifferentialConduitAPIMethod.php b/src/applications/differential/conduit/DifferentialConduitAPIMethod.php
--- a/src/applications/differential/conduit/DifferentialConduitAPIMethod.php
+++ b/src/applications/differential/conduit/DifferentialConduitAPIMethod.php
@@ -85,7 +85,7 @@
     }
 
     $message = $request->getValue('message');
-    if (strlen($message)) {
+    if (@strlen($message)) {
       // This is a little awkward, and should move elsewhere or be removed. It
       // largely exists for legacy reasons. See some discussion in T7899.
       $first_line = head(phutil_split_lines($message, false));
diff --git a/src/applications/differential/conduit/DifferentialCreateCommentConduitAPIMethod.php b/src/applications/differential/conduit/DifferentialCreateCommentConduitAPIMethod.php
--- a/src/applications/differential/conduit/DifferentialCreateCommentConduitAPIMethod.php
+++ b/src/applications/differential/conduit/DifferentialCreateCommentConduitAPIMethod.php
@@ -86,7 +86,7 @@
     }
 
     $content = $request->getValue('message');
-    if (strlen($content)) {
+    if (@strlen($content)) {
       $xactions[] = id(new DifferentialTransaction())
         ->setTransactionType(PhabricatorTransactions::TYPE_COMMENT)
         ->attachComment(
diff --git a/src/applications/differential/conduit/DifferentialGetCommitMessageConduitAPIMethod.php b/src/applications/differential/conduit/DifferentialGetCommitMessageConduitAPIMethod.php
--- a/src/applications/differential/conduit/DifferentialGetCommitMessageConduitAPIMethod.php
+++ b/src/applications/differential/conduit/DifferentialGetCommitMessageConduitAPIMethod.php
@@ -56,7 +56,7 @@
     // show "Field:" templates for some fields even if they are empty.
     $edit_mode = $request->getValue('edit');
 
-    $is_any_edit = (bool)strlen($edit_mode);
+    $is_any_edit = (bool)@strlen($edit_mode);
     $is_create = ($edit_mode == 'create');
 
     $field_list = DifferentialCommitMessageField::newEnabledFields($viewer);
@@ -115,7 +115,7 @@
 
       $is_title = ($field_key == $key_title);
 
-      if (!strlen($value)) {
+      if (!@strlen($value)) {
         if ($is_template) {
           $commit_message[] = $label.': ';
         }
@@ -127,7 +127,7 @@
             array("\r\n", "\r"),
             array("\n",   "\n"),
             $value);
-          if (strpos($value, "\n") !== false || substr($value, 0, 2) === '  ') {
+          if (@strpos($value, "\n") !== false || @substr($value, 0, 2) === '  ') {
             $commit_message[] = "{$label}:\n{$value}";
           } else {
             $commit_message[] = "{$label}: {$value}";
diff --git a/src/applications/differential/controller/DifferentialChangesetViewController.php b/src/applications/differential/controller/DifferentialChangesetViewController.php
--- a/src/applications/differential/controller/DifferentialChangesetViewController.php
+++ b/src/applications/differential/controller/DifferentialChangesetViewController.php
@@ -10,7 +10,7 @@
     $viewer = $this->getViewer();
 
     $rendering_reference = $request->getStr('ref');
-    $parts = explode('/', $rendering_reference);
+    $parts = @explode('/', $rendering_reference);
     if (count($parts) == 2) {
       list($id, $vs) = $parts;
     } else {
@@ -451,7 +451,7 @@
         continue;
       }
       $coverage_data = idx($test_coverage, $changeset->getFileName());
-      if (!strlen($coverage_data)) {
+      if (!@strlen($coverage_data)) {
         continue;
       }
       $coverage[] = $coverage_data;
diff --git a/src/applications/differential/controller/DifferentialDiffCreateController.php b/src/applications/differential/controller/DifferentialDiffCreateController.php
--- a/src/applications/differential/controller/DifferentialDiffCreateController.php
+++ b/src/applications/differential/controller/DifferentialDiffCreateController.php
@@ -52,7 +52,7 @@
         $diff = $request->getStr('diff');
       }
 
-      if (!strlen($diff)) {
+      if (!@strlen($diff)) {
         $errors[] = pht(
           'You can not create an empty diff. Paste a diff or upload a '.
           'file containing a diff.');
diff --git a/src/applications/differential/controller/DifferentialRevisionOperationController.php b/src/applications/differential/controller/DifferentialRevisionOperationController.php
--- a/src/applications/differential/controller/DifferentialRevisionOperationController.php
+++ b/src/applications/differential/controller/DifferentialRevisionOperationController.php
@@ -45,7 +45,7 @@
 
       $v_ref = $request->getArr('refPHIDs');
       $ref_phid = head($v_ref);
-      if (!strlen($ref_phid)) {
+      if (!@strlen($ref_phid)) {
         $e_ref = pht('Required');
         $errors[] = pht(
           'You must select a branch to land this revision onto.');
@@ -133,7 +133,7 @@
     DifferentialDiff $diff) {
     $default_name = $this->getDefaultRefName($repository, $diff);
 
-    if (!strlen($default_name)) {
+    if (!@strlen($default_name)) {
       return null;
     }
 
diff --git a/src/applications/differential/customfield/DifferentialBlameRevisionField.php b/src/applications/differential/customfield/DifferentialBlameRevisionField.php
--- a/src/applications/differential/customfield/DifferentialBlameRevisionField.php
+++ b/src/applications/differential/customfield/DifferentialBlameRevisionField.php
@@ -32,7 +32,7 @@
   }
 
   public function renderPropertyViewValue(array $handles) {
-    if (!strlen($this->getValue())) {
+    if (!@strlen($this->getValue())) {
       return null;
     }
 
diff --git a/src/applications/differential/customfield/DifferentialBranchField.php b/src/applications/differential/customfield/DifferentialBranchField.php
--- a/src/applications/differential/customfield/DifferentialBranchField.php
+++ b/src/applications/differential/customfield/DifferentialBranchField.php
@@ -39,13 +39,13 @@
     $branch = $diff->getBranch();
     $bookmark = $diff->getBookmark();
 
-    if (strlen($branch) && strlen($bookmark)) {
+    if (@strlen($branch) && @strlen($bookmark)) {
       return pht('%s (bookmark) on %s (branch)', $bookmark, $branch);
-    } else if (strlen($bookmark)) {
+    } else if (@strlen($bookmark)) {
       return pht('%s (bookmark)', $bookmark);
-    } else if (strlen($branch)) {
+    } else if (@strlen($branch)) {
       $onto = $diff->loadTargetBranch();
-      if (strlen($onto) && ($onto !== $branch)) {
+      if (@strlen($onto) && ($onto !== $branch)) {
         return pht(
           '%s (branched from %s)',
           $branch,
diff --git a/src/applications/differential/customfield/DifferentialCoreCustomField.php b/src/applications/differential/customfield/DifferentialCoreCustomField.php
--- a/src/applications/differential/customfield/DifferentialCoreCustomField.php
+++ b/src/applications/differential/customfield/DifferentialCoreCustomField.php
@@ -29,7 +29,7 @@
     if (is_array($value)) {
       return !$value;
     }
-    return !strlen(trim($value));
+    return !@strlen(trim($value));
   }
 
   protected function getCoreFieldRequiredErrorString() {
diff --git a/src/applications/differential/customfield/DifferentialRevertPlanField.php b/src/applications/differential/customfield/DifferentialRevertPlanField.php
--- a/src/applications/differential/customfield/DifferentialRevertPlanField.php
+++ b/src/applications/differential/customfield/DifferentialRevertPlanField.php
@@ -40,7 +40,7 @@
   }
 
   public function renderPropertyViewValue(array $handles) {
-    if (!strlen($this->getValue())) {
+    if (!@strlen($this->getValue())) {
       return null;
     }
 
@@ -53,7 +53,7 @@
 
   public function updateAbstractDocument(
     PhabricatorSearchAbstractDocument $document) {
-    if (strlen($this->getValue())) {
+    if (@strlen($this->getValue())) {
       $document->addField('rvrt', $this->getValue());
     }
   }
diff --git a/src/applications/differential/customfield/DifferentialSummaryField.php b/src/applications/differential/customfield/DifferentialSummaryField.php
--- a/src/applications/differential/customfield/DifferentialSummaryField.php
+++ b/src/applications/differential/customfield/DifferentialSummaryField.php
@@ -29,7 +29,7 @@
 
   public function updateAbstractDocument(
     PhabricatorSearchAbstractDocument $document) {
-    if (strlen($this->getValue())) {
+    if (@strlen($this->getValue())) {
       $document->addField('body', $this->getValue());
     }
   }
@@ -51,7 +51,7 @@
   }
 
   public function renderPropertyViewValue(array $handles) {
-    if (!strlen($this->getValue())) {
+    if (!@strlen($this->getValue())) {
       return null;
     }
 
@@ -72,7 +72,7 @@
     }
 
     $summary = $this->getValue();
-    if (!strlen(trim($summary))) {
+    if (!@strlen(trim($summary))) {
       return;
     }
 
diff --git a/src/applications/differential/customfield/DifferentialTestPlanField.php b/src/applications/differential/customfield/DifferentialTestPlanField.php
--- a/src/applications/differential/customfield/DifferentialTestPlanField.php
+++ b/src/applications/differential/customfield/DifferentialTestPlanField.php
@@ -33,7 +33,7 @@
 
   public function updateAbstractDocument(
     PhabricatorSearchAbstractDocument $document) {
-    if (strlen($this->getValue())) {
+    if (@strlen($this->getValue())) {
       $document->addField('plan', $this->getValue());
     }
   }
@@ -55,7 +55,7 @@
   }
 
   public function renderPropertyViewValue(array $handles) {
-    if (!strlen($this->getValue())) {
+    if (!@strlen($this->getValue())) {
       return null;
     }
 
@@ -76,7 +76,7 @@
     }
 
     $test_plan = $this->getValue();
-    if (!strlen(trim($test_plan))) {
+    if (!@strlen(trim($test_plan))) {
       return;
     }
 
diff --git a/src/applications/differential/editor/DifferentialDiffEditor.php b/src/applications/differential/editor/DifferentialDiffEditor.php
--- a/src/applications/differential/editor/DifferentialDiffEditor.php
+++ b/src/applications/differential/editor/DifferentialDiffEditor.php
@@ -145,7 +145,7 @@
             $rule = $blocking_effect->getRule();
 
             $message = $effect->getTarget();
-            if (!strlen($message)) {
+            if (!@strlen($message)) {
               $message = pht('(None.)');
             }
 
diff --git a/src/applications/differential/editor/DifferentialTransactionEditor.php b/src/applications/differential/editor/DifferentialTransactionEditor.php
--- a/src/applications/differential/editor/DifferentialTransactionEditor.php
+++ b/src/applications/differential/editor/DifferentialTransactionEditor.php
@@ -218,7 +218,7 @@
 
           // No "$", to allow for branches like T123_demo.
           $match = null;
-          if (preg_match('/^T(\d+)/i', $branch, $match)) {
+          if (@preg_match('/^T(\d+)/i', $branch, $match)) {
             $task_id = $match[1];
             $tasks = id(new ManiphestTaskQuery())
               ->setViewer($this->getActor())
@@ -744,7 +744,7 @@
 
         if (($patch !== null) && $config_inline) {
           $lines = substr_count($patch, "\n");
-          $bytes = strlen($patch);
+          $bytes = @strlen($patch);
 
           // Limit the patch size to the smaller of 256 bytes per line or
           // the mail body limit. This prevents degenerate behavior for patches
@@ -768,7 +768,7 @@
         if (($patch !== null) && $config_attach) {
           // See T12033, T11767, and PHI55. This is a crude fix to stop the
           // major concrete problems that lackluster email size limits cause.
-          if (strlen($patch) < $body_limit) {
+          if (@strlen($patch) < $body_limit) {
             $name = pht('D%s.%s.patch', $object->getID(), $diff->getID());
             $mime_type = 'text/x-patch; charset=utf-8';
             $body->addAttachment(
diff --git a/src/applications/differential/engine/DifferentialAffectedPathEngine.php b/src/applications/differential/engine/DifferentialAffectedPathEngine.php
--- a/src/applications/differential/engine/DifferentialAffectedPathEngine.php
+++ b/src/applications/differential/engine/DifferentialAffectedPathEngine.php
@@ -107,8 +107,8 @@
         $repo_root = id(new PhutilURI($repository->getRemoteURI()))->getPath();
         $repo_root = rtrim($repo_root, '/');
 
-        if (!strncmp($repo_root, $local_root, strlen($repo_root))) {
-          $path_prefix = substr($local_root, strlen($repo_root));
+        if (!strncmp($repo_root, $local_root, @strlen($repo_root))) {
+          $path_prefix = @substr($local_root, @strlen($repo_root));
         }
       }
     }
diff --git a/src/applications/differential/engine/DifferentialChangesetEngine.php b/src/applications/differential/engine/DifferentialChangesetEngine.php
--- a/src/applications/differential/engine/DifferentialChangesetEngine.php
+++ b/src/applications/differential/engine/DifferentialChangesetEngine.php
@@ -91,7 +91,7 @@
 
     $paths = PhabricatorEnv::getEnvConfig('differential.generated-paths');
     foreach ($paths as $regexp) {
-      if (preg_match($regexp, $filename)) {
+      if (@preg_match($regexp, $filename)) {
         return true;
       }
     }
@@ -103,13 +103,13 @@
 
     if ($changeset->getHunks()) {
       $new_data = $changeset->makeNewFile();
-      if (strpos($new_data, '@'.'generated') !== false) {
+      if (@strpos($new_data, '@'.'generated') !== false) {
         return true;
       }
 
       // See PHI1112. This is the official pattern for marking Go code as
       // generated.
-      if (preg_match('(^// Code generated .* DO NOT EDIT\.$)m', $new_data)) {
+      if (@preg_match('(^// Code generated .* DO NOT EDIT\.$)m', $new_data)) {
         return true;
       }
     }
@@ -195,7 +195,7 @@
           $text = trim($text);
           $files[$file][$line] = $text;
 
-          if (strlen($text) >= $min_width) {
+          if (@strlen($text) >= $min_width) {
             $map[$text][] = array($file, $line);
           }
         }
diff --git a/src/applications/differential/engine/DifferentialDiffExtractionEngine.php b/src/applications/differential/engine/DifferentialDiffExtractionEngine.php
--- a/src/applications/differential/engine/DifferentialDiffExtractionEngine.php
+++ b/src/applications/differential/engine/DifferentialDiffExtractionEngine.php
@@ -73,7 +73,7 @@
     $raw_diff = $diff_file->loadFileData();
 
     // TODO: Support adds, deletes and moves under SVN.
-    if (strlen($raw_diff)) {
+    if (@strlen($raw_diff)) {
       $changes = id(new ArcanistDiffParser())->parseDiff($raw_diff);
     } else {
       // This is an empty diff, maybe made with `git commit --allow-empty`.
diff --git a/src/applications/differential/engine/DifferentialRevisionTimelineEngine.php b/src/applications/differential/engine/DifferentialRevisionTimelineEngine.php
--- a/src/applications/differential/engine/DifferentialRevisionTimelineEngine.php
+++ b/src/applications/differential/engine/DifferentialRevisionTimelineEngine.php
@@ -26,8 +26,8 @@
 
     $old_ids = idx($view_data, 'old');
     $new_ids = idx($view_data, 'new');
-    $old_ids = array_filter(explode(',', $old_ids));
-    $new_ids = array_filter(explode(',', $new_ids));
+    $old_ids = array_filter(@explode(',', $old_ids));
+    $new_ids = array_filter(@explode(',', $new_ids));
 
     $type_inline = DifferentialTransaction::TYPE_INLINE;
     $changeset_ids = array_merge($old_ids, $new_ids);
diff --git a/src/applications/differential/engineextension/DifferentialCommitsSearchEngineAttachment.php b/src/applications/differential/engineextension/DifferentialCommitsSearchEngineAttachment.php
--- a/src/applications/differential/engineextension/DifferentialCommitsSearchEngineAttachment.php
+++ b/src/applications/differential/engineextension/DifferentialCommitsSearchEngineAttachment.php
@@ -45,11 +45,11 @@
 
       $author_name = idx($commit, 'author');
       $author_email = idx($commit, 'authorEmail');
-      if (strlen($author_name) && strlen($author_email)) {
+      if (@strlen($author_name) && @strlen($author_email)) {
         $author_raw = (string)id(new PhutilEmailAddress())
           ->setDisplayName($author_name)
           ->setAddress($author_email);
-      } else if (strlen($author_email)) {
+      } else if (@strlen($author_email)) {
         $author_raw = $author_email;
       } else {
         $author_raw = $author_name;
diff --git a/src/applications/differential/engineextension/DifferentialHovercardEngineExtension.php b/src/applications/differential/engineextension/DifferentialHovercardEngineExtension.php
--- a/src/applications/differential/engineextension/DifferentialHovercardEngineExtension.php
+++ b/src/applications/differential/engineextension/DifferentialHovercardEngineExtension.php
@@ -61,7 +61,7 @@
       $viewer->renderHandleList($reviewer_phids)->setAsInline(true));
 
     $summary = $revision->getSummary();
-    if (strlen($summary)) {
+    if (@strlen($summary)) {
       $summary = id(new PhutilUTF8StringTruncator())
         ->setMaximumGlyphs(120)
         ->truncateString($summary);
diff --git a/src/applications/differential/field/DifferentialCommitMessageField.php b/src/applications/differential/field/DifferentialCommitMessageField.php
--- a/src/applications/differential/field/DifferentialCommitMessageField.php
+++ b/src/applications/differential/field/DifferentialCommitMessageField.php
@@ -60,7 +60,7 @@
   }
 
   public function renderFieldValue($value) {
-    if (!strlen($value)) {
+    if (!@strlen($value)) {
       return null;
     }
 
diff --git a/src/applications/differential/field/DifferentialReviewersCommitMessageField.php b/src/applications/differential/field/DifferentialReviewersCommitMessageField.php
--- a/src/applications/differential/field/DifferentialReviewersCommitMessageField.php
+++ b/src/applications/differential/field/DifferentialReviewersCommitMessageField.php
@@ -117,8 +117,8 @@
     $result = array();
 
     foreach ($values as $value) {
-      if (substr($value, -1) == '!') {
-        $value = substr($value, 0, -1);
+      if (@substr($value, -1) == '!') {
+        $value = @substr($value, 0, -1);
         $suffixes = array('!' => '!');
       } else {
         $suffixes = array();
diff --git a/src/applications/differential/field/DifferentialRevisionIDCommitMessageField.php b/src/applications/differential/field/DifferentialRevisionIDCommitMessageField.php
--- a/src/applications/differential/field/DifferentialRevisionIDCommitMessageField.php
+++ b/src/applications/differential/field/DifferentialRevisionIDCommitMessageField.php
@@ -38,7 +38,7 @@
 
     // If the value is just "D123" or similar, parse the ID from it directly.
     $matches = null;
-    if (preg_match('/^[dD]([1-9]\d*)\z/', $value, $matches)) {
+    if (@preg_match('/^[dD]([1-9]\d*)\z/', $value, $matches)) {
       return (int)$matches[1];
     }
 
@@ -52,7 +52,7 @@
 
     if (PhabricatorEnv::isSelfURI($uri_string)) {
       $matches = null;
-      if (preg_match('#^/D(\d+)$#', $path, $matches)) {
+      if (@preg_match('#^/D(\d+)$#', $path, $matches)) {
         return (int)$matches[1];
       }
     }
@@ -72,7 +72,7 @@
   }
 
   public function renderFieldValue($value) {
-    if (!strlen($value)) {
+    if (!@strlen($value)) {
       return null;
     }
 
diff --git a/src/applications/differential/field/DifferentialTestPlanCommitMessageField.php b/src/applications/differential/field/DifferentialTestPlanCommitMessageField.php
--- a/src/applications/differential/field/DifferentialTestPlanCommitMessageField.php
+++ b/src/applications/differential/field/DifferentialTestPlanCommitMessageField.php
@@ -29,7 +29,7 @@
     $is_required = PhabricatorEnv::getEnvConfig(
       'differential.require-test-plan-field');
 
-    if ($is_required && !strlen($value)) {
+    if ($is_required && !@strlen($value)) {
       $this->raiseValidationException(
         pht(
           'You must provide a test plan. Describe the actions you performed '.
diff --git a/src/applications/differential/field/DifferentialTitleCommitMessageField.php b/src/applications/differential/field/DifferentialTitleCommitMessageField.php
--- a/src/applications/differential/field/DifferentialTitleCommitMessageField.php
+++ b/src/applications/differential/field/DifferentialTitleCommitMessageField.php
@@ -29,7 +29,7 @@
   }
 
   public function validateFieldValue($value) {
-    if (!strlen($value)) {
+    if (!@strlen($value)) {
       $this->raiseValidationException(
         pht(
           'You must provide a revision title in the first line '.
@@ -40,7 +40,7 @@
   public function readFieldValueFromObject(DifferentialRevision $revision) {
     $value = $revision->getTitle();
 
-    if (!strlen($value)) {
+    if (!@strlen($value)) {
       return self::getDefaultTitle();
     }
 
diff --git a/src/applications/differential/lipsum/PhabricatorDifferentialRevisionTestDataGenerator.php b/src/applications/differential/lipsum/PhabricatorDifferentialRevisionTestDataGenerator.php
--- a/src/applications/differential/lipsum/PhabricatorDifferentialRevisionTestDataGenerator.php
+++ b/src/applications/differential/lipsum/PhabricatorDifferentialRevisionTestDataGenerator.php
@@ -81,8 +81,8 @@
   }
 
   public function randomlyModify($code, $altcode) {
-    $codearr = explode("\n", $code);
-    $altcodearr = explode("\n", $altcode);
+    $codearr = @explode("\n", $code);
+    $altcodearr = @explode("\n", $altcode);
     $no_lines_to_delete = rand(1,
       min(count($codearr) - 2, 5));
     $randomlines = array_rand($codearr,
diff --git a/src/applications/differential/mail/DifferentialRevisionMailReceiver.php b/src/applications/differential/mail/DifferentialRevisionMailReceiver.php
--- a/src/applications/differential/mail/DifferentialRevisionMailReceiver.php
+++ b/src/applications/differential/mail/DifferentialRevisionMailReceiver.php
@@ -13,7 +13,7 @@
   }
 
   protected function loadObject($pattern, PhabricatorUser $viewer) {
-    $id = (int)substr($pattern, 1);
+    $id = (int)@substr($pattern, 1);
 
     return id(new DifferentialRevisionQuery())
       ->setViewer($viewer)
diff --git a/src/applications/differential/management/PhabricatorDifferentialMigrateHunkWorkflow.php b/src/applications/differential/management/PhabricatorDifferentialMigrateHunkWorkflow.php
--- a/src/applications/differential/management/PhabricatorDifferentialMigrateHunkWorkflow.php
+++ b/src/applications/differential/management/PhabricatorDifferentialMigrateHunkWorkflow.php
@@ -75,7 +75,7 @@
       DifferentialHunk::DATATYPE_FILE,
     );
     $types = array_fuse($types);
-    if (strlen($storage)) {
+    if (@strlen($storage)) {
       if (!isset($types[$storage])) {
         throw new PhutilArgumentUsageException(
           pht(
diff --git a/src/applications/differential/parser/DifferentialChangesetParser.php b/src/applications/differential/parser/DifferentialChangesetParser.php
--- a/src/applications/differential/parser/DifferentialChangesetParser.php
+++ b/src/applications/differential/parser/DifferentialChangesetParser.php
@@ -467,7 +467,7 @@
     $cache = serialize($cache);
 
     // We don't want to waste too much space by a single changeset.
-    if (strlen($cache) > self::CACHE_MAX_SIZE) {
+    if (@strlen($cache) > self::CACHE_MAX_SIZE) {
       return;
     }
 
@@ -495,13 +495,13 @@
   }
 
   private function markGenerated($new_corpus_block = '') {
-    $generated_guess = (strpos($new_corpus_block, '@'.'generated') !== false);
+    $generated_guess = (@strpos($new_corpus_block, '@'.'generated') !== false);
 
     if (!$generated_guess) {
       $generated_path_regexps = PhabricatorEnv::getEnvConfig(
         'differential.generated-paths');
       foreach ($generated_path_regexps as $regexp) {
-        if (preg_match($regexp, $this->changeset->getFilename())) {
+        if (@preg_match($regexp, $this->changeset->getFilename())) {
           $generated_guess = true;
           break;
         }
@@ -568,7 +568,7 @@
         $this->filename);
 
       if (($language != 'txt') &&
-          (strlen($corpus) > self::HIGHLIGHT_BYTE_LIMIT)) {
+          (@strlen($corpus) > self::HIGHLIGHT_BYTE_LIMIT)) {
         $this->highlightingDisabled = true;
         $language = 'txt';
       }
@@ -1087,7 +1087,7 @@
 
     if ($engine_blocks !== null) {
       $reference = $this->getRenderingReference();
-      $parts = explode('/', $reference);
+      $parts = @explode('/', $reference);
       if (count($parts) == 2) {
         list($id, $vs) = $parts;
       } else {
@@ -1310,7 +1310,7 @@
 
     if ($spec) {
       $match = null;
-      if (preg_match('@^(\d+)-(\d+)(?:/(\d+)-(\d+))?$@', $spec, $match)) {
+      if (@preg_match('@^(\d+)-(\d+)(?:/(\d+)-(\d+))?$@', $spec, $match)) {
         $range_s = (int)$match[1];
         $range_e = (int)$match[2];
         if (count($match) > 3) {
@@ -1631,7 +1631,7 @@
     // is cheap and often immediately produces the correct result with no
     // further work (and, particularly, no need to handle any unicode cases).
 
-    $len = strlen($line);
+    $len = @strlen($line);
 
     $head = 0;
     for ($head = 0; $head < $len; $head++) {
@@ -1646,18 +1646,18 @@
         $tags[$tab_width * $head] = str_repeat($tags[$tab_width], $head);
       }
       $prefix = $tags[$tab_width * $head];
-      $line = substr($line, $head);
+      $line = @substr($line, $head);
     } else {
       $prefix = '';
     }
 
     // If we have no remaining tabs elsewhere in the string after taking care
     // of all the prefix tabs, we're done.
-    if (strpos($line, "\t") === false) {
+    if (@strpos($line, "\t") === false) {
       return $prefix.$line;
     }
 
-    $len = strlen($line);
+    $len = @strlen($line);
 
     // If the line is particularly long, don't try to do anything special with
     // it. Use a faster approximation of the correct tabstop expansion instead.
@@ -1672,7 +1672,7 @@
     // See PHI1210. If the line only has single-byte characters, we don't need
     // to vectorize it and can avoid an expensive UTF8 call.
 
-    $fast_path = preg_match('/^[\x01-\x7F]*\z/', $line);
+    $fast_path = @preg_match('/^[\x01-\x7F]*\z/', $line);
     if ($fast_path) {
       $replace = array();
       for ($ii = 0; $ii < $len; $ii++) {
@@ -1816,7 +1816,7 @@
     $viewstate = $this->getViewState();
 
     $engine_key = $viewstate->getDocumentEngineKey();
-    if (strlen($engine_key)) {
+    if (@strlen($engine_key)) {
       if (isset($shared_engines[$engine_key])) {
         $document_engine = $shared_engines[$engine_key];
       } else {
diff --git a/src/applications/differential/parser/DifferentialCommitMessageParser.php b/src/applications/differential/parser/DifferentialCommitMessageParser.php
--- a/src/applications/differential/parser/DifferentialCommitMessageParser.php
+++ b/src/applications/differential/parser/DifferentialCommitMessageParser.php
@@ -172,7 +172,7 @@
         $seen[$field] = true;
       } else {
         $match = null;
-        if (preg_match($label_regexp, $line, $match)) {
+        if (@preg_match($label_regexp, $line, $match)) {
           $lines[$key] = trim($match['text']);
           $field = $label_map[self::normalizeFieldLabel($match['field'])];
           if (!empty($seen[$field])) {
@@ -200,14 +200,14 @@
     if (isset($fields[$key_title]) && empty($fields[$key_summary])) {
       $lines = $fields[$key_title];
       for ($ii = 0; $ii < count($lines); $ii++) {
-        if (strlen(trim($lines[$ii])) == 0) {
+        if (@strlen(trim($lines[$ii])) == 0) {
           break;
         }
       }
       if ($ii != count($lines)) {
         $fields[$key_title] = array_slice($lines, 0, $ii);
         $summary = array_slice($lines, $ii);
-        if (strlen(trim(implode("\n", $summary)))) {
+        if (@strlen(trim(implode("\n", $summary)))) {
           $fields[$key_summary] = $summary;
         }
       }
@@ -246,8 +246,8 @@
         //    Summary summary summary summary.
 
         $summary = idx($fields, $key_summary, '');
-        $offset = strlen($short) - strlen($terminal);
-        $remainder = ltrim(substr($fields[$key_title], $offset));
+        $offset = @strlen($short) - @strlen($terminal);
+        $remainder = ltrim(@substr($fields[$key_title], $offset));
         $summary = '...'.$remainder."\n\n".$summary;
         $summary = rtrim($summary, "\n");
 
diff --git a/src/applications/differential/parser/DifferentialHunkParser.php b/src/applications/differential/parser/DifferentialHunkParser.php
--- a/src/applications/differential/parser/DifferentialHunkParser.php
+++ b/src/applications/differential/parser/DifferentialHunkParser.php
@@ -299,7 +299,7 @@
               ($n_depth - $o_depth),
               $tab_width);
             if ($segment_width) {
-              $n_text = substr($n_text, $segment_width);
+              $n_text = @substr($n_text, $segment_width);
               $n_segments[] = array(
                 $segment_type,
                 $segment_width,
@@ -312,7 +312,7 @@
               ($o_depth - $n_depth),
               $tab_width);
             if ($segment_width) {
-              $o_text = substr($o_text, $segment_width);
+              $o_text = @substr($o_text, $segment_width);
               $o_segments[] = array(
                 $segment_type,
                 $segment_width,
@@ -490,7 +490,7 @@
           switch ($char) {
             case ' ':
               $line_type_map[$line_index] = null;
-              $line_text[$line_index] = substr($line, 1);
+              $line_text[$line_index] = @substr($line, 1);
               break;
             case "\r":
             case "\n":
@@ -506,7 +506,7 @@
             case '-':
             case '\\':
               $line_type_map[$line_index] = $char;
-              $line_text[$line_index] = substr($line, 1);
+              $line_text[$line_index] = @substr($line, 1);
               break;
             default:
               throw new Exception(
@@ -699,7 +699,7 @@
         $hunk_pos = array('-' => 0, '+' => 0);
         $hunk_offset = array('-' => null, '+' => null);
         $hunk_last = array('-' => null, '+' => null);
-        foreach (explode("\n", $hunk->getChanges()) as $line) {
+        foreach (@explode("\n", $hunk->getChanges()) as $line) {
           $in_common = strncmp($line, ' ', 1) === 0;
           $in_old = strncmp($line, '-', 1) === 0 || $in_common;
           $in_new = strncmp($line, '+', 1) === 0 || $in_common;
@@ -767,7 +767,7 @@
   }
 
   private function getIndentDepth($text, $tab_width) {
-    $len = strlen($text);
+    $len = @strlen($text);
 
     $depth = 0;
     for ($ii = 0; $ii < $len; $ii++) {
@@ -821,7 +821,7 @@
     $character_depth = 0;
     $visual_depth = 0;
 
-    $len = strlen($text);
+    $len = @strlen($text);
     for ($ii = 0; $ii < $len; $ii++) {
       if ($visual_depth >= $depth) {
         break;
diff --git a/src/applications/differential/parser/__tests__/DifferentialCommitMessageParserTestCase.php b/src/applications/differential/parser/__tests__/DifferentialCommitMessageParserTestCase.php
--- a/src/applications/differential/parser/__tests__/DifferentialCommitMessageParserTestCase.php
+++ b/src/applications/differential/parser/__tests__/DifferentialCommitMessageParserTestCase.php
@@ -7,13 +7,13 @@
     $dir = dirname(__FILE__).'/messages/';
     $list = Filesystem::listDirectory($dir, $include_hidden = false);
     foreach ($list as $file) {
-      if (!preg_match('/.txt$/', $file)) {
+      if (!@preg_match('/.txt$/', $file)) {
         continue;
       }
 
       $data = Filesystem::readFile($dir.$file);
       $divider = "~~~~~~~~~~\n";
-      $parts = explode($divider, $data);
+      $parts = @explode($divider, $data);
       if (count($parts) !== 4) {
         throw new Exception(
           pht(
diff --git a/src/applications/differential/phid/DifferentialRevisionPHIDType.php b/src/applications/differential/phid/DifferentialRevisionPHIDType.php
--- a/src/applications/differential/phid/DifferentialRevisionPHIDType.php
+++ b/src/applications/differential/phid/DifferentialRevisionPHIDType.php
@@ -48,7 +48,7 @@
   }
 
   public function canLoadNamedObject($name) {
-    return preg_match('/^D[1-9]\d*$/i', $name);
+    return @preg_match('/^D[1-9]\d*$/i', $name);
   }
 
   public function loadNamedObjects(
@@ -57,7 +57,7 @@
 
     $id_map = array();
     foreach ($names as $name) {
-      $id = (int)substr($name, 1);
+      $id = (int)@substr($name, 1);
       $id_map[$id][] = $name;
     }
 
diff --git a/src/applications/differential/render/DifferentialChangesetOneUpMailRenderer.php b/src/applications/differential/render/DifferentialChangesetOneUpMailRenderer.php
--- a/src/applications/differential/render/DifferentialChangesetOneUpMailRenderer.php
+++ b/src/applications/differential/render/DifferentialChangesetOneUpMailRenderer.php
@@ -103,7 +103,7 @@
     // Remove all leading and trailing empty lines, since these just look kind
     // of weird in mail.
     foreach ($out as $key => $line) {
-      if (!strlen(trim($line['text']))) {
+      if (!@strlen(trim($line['text']))) {
         unset($out[$key]);
       } else {
         break;
@@ -113,7 +113,7 @@
     $keys = array_reverse(array_keys($out));
     foreach ($keys as $key) {
       $line = $out[$key];
-      if (!strlen(trim($line['text']))) {
+      if (!@strlen(trim($line['text']))) {
         unset($out[$key]);
       } else {
         break;
diff --git a/src/applications/differential/storage/DifferentialChangeset.php b/src/applications/differential/storage/DifferentialChangeset.php
--- a/src/applications/differential/storage/DifferentialChangeset.php
+++ b/src/applications/differential/storage/DifferentialChangeset.php
@@ -273,9 +273,9 @@
     $with_context = array();
     foreach ($this->getHunks() as $hunk) {
       $context = array();
-      $changes = explode("\n", $hunk->getChanges());
+      $changes = @explode("\n", $hunk->getChanges());
       foreach ($changes as $l => $line) {
-        $type = substr($line, 0, 1);
+        $type = @substr($line, 0, 1);
         if ($type == '+' || $type == '-') {
           $context += array_fill($l - $num_lines, 2 * $num_lines + 1, true);
         }
@@ -305,8 +305,8 @@
     if ($repository && $repository->getVersionControlSystem() == $svn) {
       $prefix = $repository->getDetail('remote-uri');
       $prefix = id(new PhutilURI($prefix))->getPath();
-      if (!strncmp($path, $prefix, strlen($prefix))) {
-        $path = substr($path, strlen($prefix));
+      if (!strncmp($path, $prefix, @strlen($prefix))) {
+        $path = @substr($path, @strlen($prefix));
       }
       $path = '/'.ltrim($path, '/');
     }
@@ -325,12 +325,12 @@
 
   public function getOldStatePathVector() {
     $path = $this->getOldFile();
-    if (!strlen($path)) {
+    if (!@strlen($path)) {
       $path = $this->getFilename();
     }
 
     $path = trim($path, '/');
-    $path = explode('/', $path);
+    $path = @explode('/', $path);
 
     return $path;
   }
@@ -342,7 +342,7 @@
 
     $path = $this->getFilename();
     $path = trim($path, '/');
-    $path = explode('/', $path);
+    $path = @explode('/', $path);
 
     return $path;
   }
@@ -674,7 +674,7 @@
   }
 
   private function getMetadataWithPrefix($prefix) {
-    $length = strlen($prefix);
+    $length = @strlen($prefix);
 
     $result = array();
     foreach ($this->getMetadata() as $key => $value) {
@@ -682,7 +682,7 @@
         continue;
       }
 
-      $key = substr($key, $length);
+      $key = @substr($key, $length);
       $result[$key] = $value;
     }
 
@@ -759,7 +759,7 @@
     }
 
     $absolute_path = $this->getAbsoluteRepositoryPath($repository, $diff);
-    if (strlen($absolute_path)) {
+    if (@strlen($absolute_path)) {
       $absolute_path = base64_encode($absolute_path);
     } else {
       $absolute_path = null;
diff --git a/src/applications/differential/storage/DifferentialDiff.php b/src/applications/differential/storage/DifferentialDiff.php
--- a/src/applications/differential/storage/DifferentialDiff.php
+++ b/src/applications/differential/storage/DifferentialDiff.php
@@ -777,7 +777,7 @@
     $refs = array();
 
     $branch = $this->getBranch();
-    if (strlen($branch)) {
+    if (@strlen($branch)) {
       $refs[] = array(
         'type' => 'branch',
         'name' => $branch,
@@ -785,7 +785,7 @@
     }
 
     $onto = $this->loadTargetBranch();
-    if (strlen($onto)) {
+    if (@strlen($onto)) {
       $refs[] = array(
         'type' => 'onto',
         'name' => $onto,
@@ -793,7 +793,7 @@
     }
 
     $base = $this->getSourceControlBaseRevision();
-    if (strlen($base)) {
+    if (@strlen($base)) {
       $refs[] = array(
         'type' => 'base',
         'identifier' => $base,
@@ -801,7 +801,7 @@
     }
 
     $bookmark = $this->getBookmark();
-    if (strlen($bookmark)) {
+    if (@strlen($bookmark)) {
       $refs[] = array(
         'type' => 'bookmark',
         'name' => $bookmark,
diff --git a/src/applications/differential/storage/DifferentialHunk.php b/src/applications/differential/storage/DifferentialHunk.php
--- a/src/applications/differential/storage/DifferentialHunk.php
+++ b/src/applications/differential/storage/DifferentialHunk.php
@@ -172,7 +172,7 @@
 
         $structured[] = array(
           'type' => $line[0],
-          'text' => substr($line, 1),
+          'text' => @substr($line, 1),
         );
       }
 
@@ -208,7 +208,7 @@
     $results = array();
 
     $include_map = array();
-    for ($ii = 0; $ii < strlen($include); $ii++) {
+    for ($ii = 0; $ii < @strlen($include); $ii++) {
       $include_map[$include[$ii]] = true;
     }
 
@@ -232,7 +232,7 @@
         $use_next_newline = false;
       } else {
         $use_next_newline = true;
-        $results[$n] = substr($line, 1);
+        $results[$n] = @substr($line, 1);
       }
 
       if ($line[0] == ' ' || isset($include_map[$line[0]])) {
diff --git a/src/applications/differential/view/DifferentialChangesetDetailView.php b/src/applications/differential/view/DifferentialChangesetDetailView.php
--- a/src/applications/differential/view/DifferentialChangesetDetailView.php
+++ b/src/applications/differential/view/DifferentialChangesetDetailView.php
@@ -163,7 +163,7 @@
     $path_part = dirname($display_filename);
     $file_part = basename($display_filename);
     $display_parts = array();
-    if (strlen($path_part)) {
+    if (@strlen($path_part)) {
       $path_part = $path_part.'/';
       $display_parts[] = phutil_tag(
         'span',
@@ -191,7 +191,7 @@
     }
 
     $path_parts = trim($display_filename, '/');
-    $path_parts = explode('/', $path_parts);
+    $path_parts = @explode('/', $path_parts);
 
     $show_path_uri = null;
     $show_directory_uri = null;
diff --git a/src/applications/differential/view/DifferentialLocalCommitsView.php b/src/applications/differential/view/DifferentialLocalCommitsView.php
--- a/src/applications/differential/view/DifferentialLocalCommitsView.php
+++ b/src/applications/differential/view/DifferentialLocalCommitsView.php
@@ -129,7 +129,7 @@
   }
 
   private static function formatCommit($commit) {
-    return substr($commit, 0, 12);
+    return @substr($commit, 0, 12);
   }
 
   private function buildCommitLink($hash) {
diff --git a/src/applications/differential/view/DifferentialRevisionUpdateHistoryView.php b/src/applications/differential/view/DifferentialRevisionUpdateHistoryView.php
--- a/src/applications/differential/view/DifferentialRevisionUpdateHistoryView.php
+++ b/src/applications/differential/view/DifferentialRevisionUpdateHistoryView.php
@@ -265,18 +265,18 @@
     switch ($diff->getSourceControlSystem()) {
       case 'git':
         $base = $diff->getSourceControlBaseRevision();
-        if (strpos($base, '@') === false) {
-          $label = substr($base, 0, 7);
+        if (@strpos($base, '@') === false) {
+          $label = @substr($base, 0, 7);
         } else {
           // The diff is from git-svn
-          $base = explode('@', $base);
+          $base = @explode('@', $base);
           $base = last($base);
           $label = $base;
         }
         break;
       case 'svn':
         $base = $diff->getSourceControlBaseRevision();
-        $base = explode('@', $base);
+        $base = @explode('@', $base);
         $base = last($base);
         $label = $base;
         break;
diff --git a/src/applications/differential/xaction/DifferentialRevisionTitleTransaction.php b/src/applications/differential/xaction/DifferentialRevisionTitleTransaction.php
--- a/src/applications/differential/xaction/DifferentialRevisionTitleTransaction.php
+++ b/src/applications/differential/xaction/DifferentialRevisionTitleTransaction.php
@@ -42,7 +42,7 @@
     $max_length = $object->getColumnMaximumByteLength('title');
     foreach ($xactions as $xaction) {
       $new_value = $xaction->getNewValue();
-      $new_length = strlen($new_value);
+      $new_length = @strlen($new_value);
       if ($new_length > $max_length) {
         $errors[] = $this->newInvalidError(
           pht(
diff --git a/src/applications/differential/xaction/DifferentialRevisionTransactionType.php b/src/applications/differential/xaction/DifferentialRevisionTransactionType.php
--- a/src/applications/differential/xaction/DifferentialRevisionTransactionType.php
+++ b/src/applications/differential/xaction/DifferentialRevisionTransactionType.php
@@ -21,7 +21,7 @@
 
   private function validateMessageCorpus($xaction, $field_name) {
     $value = $xaction->getNewValue();
-    if (!strlen($value)) {
+    if (!@strlen($value)) {
       return null;
     }
 
diff --git a/src/applications/diffusion/DiffusionLintSaveRunner.php b/src/applications/diffusion/DiffusionLintSaveRunner.php
--- a/src/applications/diffusion/DiffusionLintSaveRunner.php
+++ b/src/applications/diffusion/DiffusionLintSaveRunner.php
@@ -52,7 +52,7 @@
     $this->svnRoot = id(new PhutilURI($api->getSourceControlPath()))->getPath();
     if ($api instanceof ArcanistGitAPI) {
       $svn_fetch = $api->getGitConfig('svn-remote.svn.fetch');
-      list($this->svnRoot) = explode(':', $svn_fetch);
+      list($this->svnRoot) = @explode(':', $svn_fetch);
       if ($this->svnRoot != '') {
         $this->svnRoot = '/'.$this->svnRoot;
       }
diff --git a/src/applications/diffusion/conduit/DiffusionBranchQueryConduitAPIMethod.php b/src/applications/diffusion/conduit/DiffusionBranchQueryConduitAPIMethod.php
--- a/src/applications/diffusion/conduit/DiffusionBranchQueryConduitAPIMethod.php
+++ b/src/applications/diffusion/conduit/DiffusionBranchQueryConduitAPIMethod.php
@@ -30,7 +30,7 @@
     $repository = $drequest->getRepository();
 
     $contains = $request->getValue('contains');
-    if (strlen($contains)) {
+    if (@strlen($contains)) {
 
       // See PHI958 (and, earlier, PHI720). If "patterns" are provided, pass
       // them to "git branch ..." to let callers test for reachability from
@@ -80,7 +80,7 @@
       ->setRepository($repository);
 
     $contains = $request->getValue('contains');
-    if (strlen($contains)) {
+    if (@strlen($contains)) {
       $query->withContainsCommit($contains);
     }
 
diff --git a/src/applications/diffusion/conduit/DiffusionBrowseQueryConduitAPIMethod.php b/src/applications/diffusion/conduit/DiffusionBrowseQueryConduitAPIMethod.php
--- a/src/applications/diffusion/conduit/DiffusionBrowseQueryConduitAPIMethod.php
+++ b/src/applications/diffusion/conduit/DiffusionBrowseQueryConduitAPIMethod.php
@@ -37,7 +37,7 @@
     $repository = $drequest->getRepository();
 
     $path = $request->getValue('path');
-    if (!strlen($path) || $path === '/') {
+    if (!@strlen($path) || $path === '/') {
       $path = null;
     }
 
@@ -88,7 +88,7 @@
         }
 
         $stderr = $e->getStderr();
-        if (preg_match('/^fatal: Not a valid object name/', $stderr)) {
+        if (@preg_match('/^fatal: Not a valid object name/', $stderr)) {
           // Grab two logs, since the first one is when the object was deleted.
           list($stdout) = $repository->execxLocalCommand(
             'log -n2 %s %s -- %s',
@@ -97,7 +97,7 @@
             $path);
           $stdout = trim($stdout);
           if ($stdout) {
-            $commits = explode("\n", $stdout);
+            $commits = @explode("\n", $stdout);
             $result
               ->setReasonForEmptyResultSet(
                 DiffusionBrowseResultSet::REASON_IS_DELETED)
@@ -149,7 +149,7 @@
     $results = array();
     $lines = empty($stdout)
            ? array()
-           : explode("\0", rtrim($stdout));
+           : @explode("\0", rtrim($stdout));
 
     foreach ($lines as $line) {
       // NOTE: Limit to 5 components so we parse filenames with spaces in them
@@ -236,10 +236,10 @@
           $tmp);
 
         $dict = array();
-        $lines = explode("\n", trim($module_info));
+        $lines = @explode("\n", trim($module_info));
         foreach ($lines as $line) {
-          list($key, $value) = explode('=', $line, 2);
-          $parts = explode('.', $key);
+          list($key, $value) = @explode('=', $line, 2);
+          $parts = @explode('.', $key);
           $dict[$key] = $value;
         }
 
@@ -275,7 +275,7 @@
     $results = array();
 
     $match_against = trim($path, '/');
-    $match_len = strlen($match_against);
+    $match_len = @strlen($match_against);
 
     // For the root, don't trim. For other paths, trim the "/" after we match.
     // We need this because Mercurial's canonical paths have no leading "/",
@@ -287,11 +287,11 @@
       if (strncmp($path, $match_against, $match_len)) {
         continue;
       }
-      if (!strlen($path)) {
+      if (!@strlen($path)) {
         continue;
       }
-      $remainder = substr($path, $trim_len);
-      if (!strlen($remainder)) {
+      $remainder = @substr($path, $trim_len);
+      if (!@strlen($remainder)) {
         // There is a file with this exact name in the manifest, so clearly
         // it's a file.
         $result->setReasonForEmptyResultSet(
@@ -299,7 +299,7 @@
         return $result;
       }
 
-      $parts = explode('/', $remainder);
+      $parts = @explode('/', $remainder);
       $name = reset($parts);
 
       // If we've already seen this path component, we're looking at a file
@@ -357,7 +357,7 @@
     $result = $this->getEmptyResultSet();
 
     $subpath = $repository->getDetail('svn-subpath');
-    if ($subpath && strncmp($subpath, $path, strlen($subpath))) {
+    if ($subpath && strncmp($subpath, $path, @strlen($subpath))) {
       // If we have a subpath and the path isn't a child of it, it (almost
       // certainly) won't exist since we don't track commits which affect
       // it. (Even if it exists, return a consistent result.)
@@ -516,7 +516,7 @@
     foreach ($browse as $file) {
 
       $full_path = $file['pathName'];
-      $file_path = ltrim(substr($full_path, strlen($path_normal)), '/');
+      $file_path = ltrim(@substr($full_path, @strlen($path_normal)), '/');
       $full_path = ltrim($full_path, '/');
 
       $result_path = new DiffusionRepositoryPath();
diff --git a/src/applications/diffusion/conduit/DiffusionHistoryQueryConduitAPIMethod.php b/src/applications/diffusion/conduit/DiffusionHistoryQueryConduitAPIMethod.php
--- a/src/applications/diffusion/conduit/DiffusionHistoryQueryConduitAPIMethod.php
+++ b/src/applications/diffusion/conduit/DiffusionHistoryQueryConduitAPIMethod.php
@@ -47,14 +47,14 @@
     $against_hash = $request->getValue('against');
 
     $path = $request->getValue('path');
-    if (!strlen($path)) {
+    if (!@strlen($path)) {
       $path = null;
     }
 
     $offset = $request->getValue('offset');
     $limit = $request->getValue('limit');
 
-    if (strlen($against_hash)) {
+    if (@strlen($against_hash)) {
       $commit_range = "${against_hash}..${commit_hash}";
     } else {
       $commit_range = $commit_hash;
@@ -82,13 +82,13 @@
       'log %Ls',
       $argv);
 
-    $lines = explode("\n", trim($stdout));
+    $lines = @explode("\n", trim($stdout));
     $lines = array_filter($lines);
 
     $hash_list = array();
     $parent_map = array();
     foreach ($lines as $line) {
-      list($hash, $parents) = explode(':', $line);
+      list($hash, $parents) = @explode(':', $line);
       $hash_list[] = $hash;
       $parent_map[$hash] = preg_split('/\s+/', $parents);
     }
@@ -136,7 +136,7 @@
     // stop history (this is more consistent with the Mercurial worldview of
     // branches).
 
-    if (strlen($path)) {
+    if (@strlen($path)) {
       $path_arg = csprintf('%s', $path);
       $revset_arg = hgsprintf(
         'reverse(ancestors(%s))',
@@ -158,7 +158,7 @@
 
     $stdout = DiffusionMercurialCommandEngine::filterMercurialDebugOutput(
       $stdout);
-    $lines = explode("\n", trim($stdout));
+    $lines = @explode("\n", trim($stdout));
     $lines = array_slice($lines, $offset);
 
     $hash_list = array();
@@ -166,7 +166,7 @@
 
     $last = null;
     foreach (array_reverse($lines) as $line) {
-      list($hash, $parents) = explode(';', $line);
+      list($hash, $parents) = @explode(';', $line);
       $parents = trim($parents);
       if (!$parents) {
         if ($last === null) {
@@ -177,8 +177,8 @@
       } else {
         $parents = preg_split('/\s+/', $parents);
         foreach ($parents as $parent) {
-          list($plocal, $phash) = explode(':', $parent);
-          if (!preg_match('/^0+$/', $phash)) {
+          list($plocal, $phash) = @explode(':', $parent);
+          if (!@preg_match('/^0+$/', $phash)) {
             $parent_map[$hash][] = $phash;
           }
         }
diff --git a/src/applications/diffusion/conduit/DiffusionInternalGitRawDiffQueryConduitAPIMethod.php b/src/applications/diffusion/conduit/DiffusionInternalGitRawDiffQueryConduitAPIMethod.php
--- a/src/applications/diffusion/conduit/DiffusionInternalGitRawDiffQueryConduitAPIMethod.php
+++ b/src/applications/diffusion/conduit/DiffusionInternalGitRawDiffQueryConduitAPIMethod.php
@@ -46,7 +46,7 @@
       'log -n1 %s %s --',
       '--format=%P',
       gitsprintf('%s', $commit));
-    $use_log = !strlen(trim($parents));
+    $use_log = !@strlen(trim($parents));
 
     // First, get a fast raw diff without "--find-copies-harder". This flag
     // produces better results for moves and copies, but is explosively slow
diff --git a/src/applications/diffusion/conduit/DiffusionMergedCommitsQueryConduitAPIMethod.php b/src/applications/diffusion/conduit/DiffusionMergedCommitsQueryConduitAPIMethod.php
--- a/src/applications/diffusion/conduit/DiffusionMergedCommitsQueryConduitAPIMethod.php
+++ b/src/applications/diffusion/conduit/DiffusionMergedCommitsQueryConduitAPIMethod.php
@@ -57,7 +57,7 @@
       gitsprintf('%s', $commit),
       gitsprintf('%s', '^'.$first_parent));
 
-    $hashes = explode("\n", trim($logs));
+    $hashes = @explode("\n", trim($logs));
 
     // Remove the merge commit.
     $hashes = array_diff($hashes, array($commit));
@@ -78,7 +78,7 @@
       'parents --template=%s --rev %s',
       '{node}\\n',
       hgsprintf('%s', $commit));
-    $parents = explode("\n", trim($parents));
+    $parents = @explode("\n", trim($parents));
 
     if (count($parents) < 2) {
       // Not a merge commit.
@@ -97,7 +97,7 @@
       $commit,
       $last_parent);
 
-    $hashes = explode("\n", trim($logs));
+    $hashes = @explode("\n", trim($logs));
 
     // Remove the merge commit.
     $hashes = array_diff($hashes, array($commit));
diff --git a/src/applications/diffusion/conduit/DiffusionQueryPathsConduitAPIMethod.php b/src/applications/diffusion/conduit/DiffusionQueryPathsConduitAPIMethod.php
--- a/src/applications/diffusion/conduit/DiffusionQueryPathsConduitAPIMethod.php
+++ b/src/applications/diffusion/conduit/DiffusionQueryPathsConduitAPIMethod.php
@@ -39,7 +39,7 @@
 
     // Recent versions of Git don't work if you pass the empty string, and
     // require "." to list everything.
-    if (!strlen($path)) {
+    if (!@strlen($path)) {
       $path = '.';
     }
 
@@ -65,11 +65,11 @@
       ->execute();
 
     $match_against = trim($path, '/');
-    $match_len = strlen($match_against);
+    $match_len = @strlen($match_against);
 
     $lines = array();
     foreach ($entire_manifest as $path) {
-      if (strlen($path) && !strncmp($path, $match_against, $match_len)) {
+      if (@strlen($path) && !strncmp($path, $match_against, $match_len)) {
         $lines[] = $path;
       }
     }
@@ -82,7 +82,7 @@
     $limit = (int)$request->getValue('limit');
     $offset = (int)$request->getValue('offset');
 
-    if (strlen($pattern)) {
+    if (@strlen($pattern)) {
       // Add delimiters to the regex pattern.
       $pattern = '('.$pattern.')';
     }
@@ -90,7 +90,7 @@
     $results = array();
     $count = 0;
     foreach ($lines as $line) {
-      if (strlen($pattern) && !preg_match($pattern, $line)) {
+      if (@strlen($pattern) && !@preg_match($pattern, $line)) {
         continue;
       }
 
diff --git a/src/applications/diffusion/conduit/DiffusionRefsQueryConduitAPIMethod.php b/src/applications/diffusion/conduit/DiffusionRefsQueryConduitAPIMethod.php
--- a/src/applications/diffusion/conduit/DiffusionRefsQueryConduitAPIMethod.php
+++ b/src/applications/diffusion/conduit/DiffusionRefsQueryConduitAPIMethod.php
@@ -38,7 +38,7 @@
     if (!$refs) {
       return array();
     }
-    $refs = explode(',', $refs);
+    $refs = @explode(',', $refs);
     $refs = array_map('trim', $refs);
 
     $ref_links = array();
diff --git a/src/applications/diffusion/conduit/DiffusionSearchQueryConduitAPIMethod.php b/src/applications/diffusion/conduit/DiffusionSearchQueryConduitAPIMethod.php
--- a/src/applications/diffusion/conduit/DiffusionSearchQueryConduitAPIMethod.php
+++ b/src/applications/diffusion/conduit/DiffusionSearchQueryConduitAPIMethod.php
@@ -56,7 +56,7 @@
 
     // Starting with Git 2.16.0, Git assumes passing an empty argument is
     // an error and recommends you pass "." instead.
-    if (!strlen($path)) {
+    if (!@strlen($path)) {
       $path = '.';
     }
 
@@ -76,9 +76,9 @@
 
     foreach ($lines as $line) {
       $result = null;
-      if (preg_match('/[^:]*:(.+)\0(.+)\0(.*)/', $line, $result)) {
+      if (@preg_match('/[^:]*:(.+)\0(.+)\0(.*)/', $line, $result)) {
         $results[] = array_slice($result, 1);
-      } else if (preg_match($binary_pattern, $line, $result)) {
+      } else if (@preg_match($binary_pattern, $line, $result)) {
         list(, $path) = $result;
         $results[] = array($path, null, pht('Binary file'));
       } else {
diff --git a/src/applications/diffusion/conduit/DiffusionTagsQueryConduitAPIMethod.php b/src/applications/diffusion/conduit/DiffusionTagsQueryConduitAPIMethod.php
--- a/src/applications/diffusion/conduit/DiffusionTagsQueryConduitAPIMethod.php
+++ b/src/applications/diffusion/conduit/DiffusionTagsQueryConduitAPIMethod.php
@@ -109,11 +109,11 @@
     }
 
     $stdout = rtrim($stdout, "\n");
-    if (!strlen($stdout)) {
+    if (!@strlen($stdout)) {
       return array();
     }
 
-    $tag_names = explode("\n", $stdout);
+    $tag_names = @explode("\n", $stdout);
     $tag_names = array_fill_keys($tag_names, true);
 
     return $tag_names;
@@ -146,7 +146,7 @@
         // `git tag x [commit]` are "lightweight tags" and `git cat-file tag`
         // will fail on them. This is fine: they don't have messages.
       } else {
-        $parts = explode("\n\n", $stdout, 2);
+        $parts = @explode("\n\n", $stdout, 2);
         if (count($parts) == 2) {
           $message = last($parts);
         }
diff --git a/src/applications/diffusion/controller/DiffusionBranchTableController.php b/src/applications/diffusion/controller/DiffusionBranchTableController.php
--- a/src/applications/diffusion/controller/DiffusionBranchTableController.php
+++ b/src/applications/diffusion/controller/DiffusionBranchTableController.php
@@ -26,7 +26,7 @@
     );
 
     $contains = $drequest->getSymbolicCommit();
-    if (strlen($contains)) {
+    if (@strlen($contains)) {
       $params['contains'] = $contains;
     }
 
diff --git a/src/applications/diffusion/controller/DiffusionBrowseController.php b/src/applications/diffusion/controller/DiffusionBrowseController.php
--- a/src/applications/diffusion/controller/DiffusionBrowseController.php
+++ b/src/applications/diffusion/controller/DiffusionBrowseController.php
@@ -22,7 +22,7 @@
     // list.
 
     $grep = $request->getStr('grep');
-    if (strlen($grep)) {
+    if (@strlen($grep)) {
       return $this->browseSearch();
     }
 
@@ -391,7 +391,7 @@
         $results = array();
         break;
       default:
-        if (strlen($this->getRequest()->getStr('grep'))) {
+        if (@strlen($this->getRequest()->getStr('grep'))) {
           $search_mode = 'grep';
           $query_string = $request->getStr('grep');
           $results = $this->callConduitWithDiffusionRequest(
@@ -758,7 +758,7 @@
     $old_line = 0;
     $new_line = 0;
 
-    foreach (explode("\n", $raw_diff) as $text) {
+    foreach (@explode("\n", $raw_diff) as $text) {
       if ($text[0] == '-' || $text[0] == ' ') {
         $old_line++;
       }
@@ -917,7 +917,7 @@
       $tags = mpull($tags, null, 'getName');
       $tag = idx($tags, $symbolic);
 
-      if ($tag && strlen($tag->getMessage())) {
+      if ($tag && @strlen($tag->getMessage())) {
         $view->addSectionHeader(
           pht('Tag Content'), 'fa-tag');
         $view->addTextContent($this->markupText($tag->getMessage()));
@@ -980,12 +980,12 @@
     }
 
     $lfs_pattern = '(^version https://git-lfs\\.github\\.com/spec/v1[\r\n])';
-    if (!preg_match($lfs_pattern, $data)) {
+    if (!@preg_match($lfs_pattern, $data)) {
       return null;
     }
 
     $matches = null;
-    if (!preg_match('(^oid sha256:(.*)$)m', $data, $matches)) {
+    if (!@preg_match('(^oid sha256:(.*)$)m', $data, $matches)) {
       return null;
     }
 
diff --git a/src/applications/diffusion/controller/DiffusionCommitController.php b/src/applications/diffusion/controller/DiffusionCommitController.php
--- a/src/applications/diffusion/controller/DiffusionCommitController.php
+++ b/src/applications/diffusion/controller/DiffusionCommitController.php
@@ -27,8 +27,8 @@
 
     // If this page is being accessed via "/source/xyz/commit/...", redirect
     // to the canonical URI.
-    $has_callsign = strlen($request->getURIData('repositoryCallsign'));
-    $has_id = strlen($request->getURIData('repositoryID'));
+    $has_callsign = @strlen($request->getURIData('repositoryCallsign'));
+    $has_id = @strlen($request->getURIData('repositoryID'));
     if (!$has_callsign && !$has_id) {
       $canonical_uri = $repository->getCommitURI($commit_identifier);
       return id(new AphrontRedirectResponse())
@@ -922,7 +922,7 @@
 
   private function linkBugtraq($corpus) {
     $url = PhabricatorEnv::getEnvConfig('bugtraq.url');
-    if (!strlen($url)) {
+    if (!@strlen($url)) {
       return $corpus;
     }
 
diff --git a/src/applications/diffusion/controller/DiffusionCompareController.php b/src/applications/diffusion/controller/DiffusionCompareController.php
--- a/src/applications/diffusion/controller/DiffusionCompareController.php
+++ b/src/applications/diffusion/controller/DiffusionCompareController.php
@@ -32,14 +32,14 @@
 
     $must_prompt = false;
     if (!$request->isFormPost()) {
-      if (!strlen($head_ref)) {
+      if (!@strlen($head_ref)) {
         $head_ref = $drequest->getSymbolicCommit();
-        if (!strlen($head_ref)) {
+        if (!@strlen($head_ref)) {
           $head_ref = $drequest->getBranch();
         }
       }
 
-      if (!strlen($against_ref)) {
+      if (!@strlen($against_ref)) {
         $default_branch = $repository->getDefaultBranch();
         if ($default_branch != $head_ref) {
           $against_ref = $default_branch;
@@ -176,7 +176,7 @@
     $e_against = null;
     $errors = array();
     if ($request->isFormPost()) {
-      if (!strlen($head_ref)) {
+      if (!@strlen($head_ref)) {
         $e_head = pht('Required');
         $errors[] = pht(
           'You must provide two different commits to compare.');
@@ -187,7 +187,7 @@
           $head_ref);
       }
 
-      if (!strlen($against_ref)) {
+      if (!@strlen($against_ref)) {
         $e_against = pht('Required');
         $errors[] = pht(
           'You must provide two different commits to compare.');
diff --git a/src/applications/diffusion/controller/DiffusionController.php b/src/applications/diffusion/controller/DiffusionController.php
--- a/src/applications/diffusion/controller/DiffusionController.php
+++ b/src/applications/diffusion/controller/DiffusionController.php
@@ -97,19 +97,19 @@
     AphrontRequest $request) {
 
     $short_name = $request->getURIData('repositoryShortName');
-    if (strlen($short_name)) {
+    if (@strlen($short_name)) {
       // If the short name ends in ".git", ignore it.
       $short_name = preg_replace('/\\.git\z/', '', $short_name);
       return $short_name;
     }
 
     $identifier = $request->getURIData('repositoryCallsign');
-    if (strlen($identifier)) {
+    if (@strlen($identifier)) {
       return $identifier;
     }
 
     $id = $request->getURIData('repositoryID');
-    if (strlen($id)) {
+    if (@strlen($id)) {
       return (int)$id;
     }
 
@@ -153,7 +153,7 @@
 
     if (!$spec['commit'] && !$spec['tags'] && !$spec['branches']) {
       $branch_name = $drequest->getBranch();
-      if (strlen($branch_name)) {
+      if (@strlen($branch_name)) {
         $repository_name .= ' ('.$branch_name.')';
       }
     }
@@ -265,7 +265,7 @@
 
   protected function renderPathLinks(DiffusionRequest $drequest, $action) {
     $path = $drequest->getPath();
-    $path_parts = array_filter(explode('/', trim($path, '/')));
+    $path_parts = array_filter(@explode('/', trim($path, '/')));
 
     $divider = phutil_tag(
       'span',
@@ -434,7 +434,7 @@
     }
 
     $readme_corpus = $readme_cache['corpus'];
-    if (!strlen($readme_corpus)) {
+    if (!@strlen($readme_corpus)) {
       return null;
     }
 
diff --git a/src/applications/diffusion/controller/DiffusionExternalController.php b/src/applications/diffusion/controller/DiffusionExternalController.php
--- a/src/applications/diffusion/controller/DiffusionExternalController.php
+++ b/src/applications/diffusion/controller/DiffusionExternalController.php
@@ -59,7 +59,7 @@
 
     if (empty($commits)) {
       $desc = null;
-      if (strlen($uri)) {
+      if (@strlen($uri)) {
         $desc = pht('"%s", at "%s"', $uri, $id);
       } else {
         $desc = pht('"%s"', $id);
diff --git a/src/applications/diffusion/controller/DiffusionHistoryController.php b/src/applications/diffusion/controller/DiffusionHistoryController.php
--- a/src/applications/diffusion/controller/DiffusionHistoryController.php
+++ b/src/applications/diffusion/controller/DiffusionHistoryController.php
@@ -50,7 +50,7 @@
     // ancestors appropriately, but this would currrently be prohibitively
     // expensive in the general case.
 
-    $show_graph = !strlen($drequest->getPath());
+    $show_graph = !@strlen($drequest->getPath());
     if ($show_graph) {
       $history_list
         ->setParents($history_results['parents'])
@@ -98,7 +98,7 @@
     $viewer = $this->getViewer();
     $repository = $drequest->getRepository();
 
-    $no_path = !strlen($drequest->getPath());
+    $no_path = !@strlen($drequest->getPath());
     if ($no_path) {
       $header_text = pht('History');
     } else {
diff --git a/src/applications/diffusion/controller/DiffusionLintController.php b/src/applications/diffusion/controller/DiffusionLintController.php
--- a/src/applications/diffusion/controller/DiffusionLintController.php
+++ b/src/applications/diffusion/controller/DiffusionLintController.php
@@ -21,7 +21,7 @@
     }
 
     $code = $request->getStr('lint');
-    if (strlen($code)) {
+    if (@strlen($code)) {
       return $this->buildDetailsResponse();
     }
 
@@ -230,7 +230,7 @@
 
       if ($drequest->getPath() != '') {
         $path = '/'.$drequest->getPath();
-        $is_dir = (substr($path, -1) == '/');
+        $is_dir = (@substr($path, -1) == '/');
         $where[] = ($is_dir
           ? qsprintf($conn, 'path LIKE %>', $path)
           : qsprintf($conn, 'path = %s', $path));
@@ -395,7 +395,7 @@
     $drequest = $this->getDiffusionRequest();
     $branch = $drequest->loadBranch();
     $messages = $this->loadLintMessages($branch, $limit, $offset);
-    $is_dir = (substr('/'.$drequest->getPath(), -1) == '/');
+    $is_dir = (@substr('/'.$drequest->getPath(), -1) == '/');
 
     $pager->setHasMorePages(count($messages) >= $limit);
 
@@ -411,7 +411,7 @@
             'path' => $message['path'],
           )),
         ),
-        substr($message['path'], strlen($drequest->getPath()) + 1));
+        @substr($message['path'], @strlen($drequest->getPath()) + 1));
 
       $line = phutil_tag(
         'a',
@@ -509,7 +509,7 @@
 
     if ($drequest->getPath() != '') {
       $path = '/'.$drequest->getPath();
-      $is_dir = (substr($path, -1) == '/');
+      $is_dir = (@substr($path, -1) == '/');
       $where[] = ($is_dir
         ? qsprintf($conn, 'path LIKE %>', $path)
         : qsprintf($conn, 'path = %s', $path));
diff --git a/src/applications/diffusion/controller/DiffusionPathCompleteController.php b/src/applications/diffusion/controller/DiffusionPathCompleteController.php
--- a/src/applications/diffusion/controller/DiffusionPathCompleteController.php
+++ b/src/applications/diffusion/controller/DiffusionPathCompleteController.php
@@ -17,7 +17,7 @@
     $drequest = $this->getDiffusionRequest();
 
     $query_path = $request->getStr('q');
-    if (preg_match('@/$@', $query_path)) {
+    if (@preg_match('@/$@', $query_path)) {
       $query_dir = $query_path;
     } else {
       $query_dir = dirname($query_path).'/';
@@ -39,7 +39,7 @@
       if ($path->getFileType() == DifferentialChangeType::FILE_DIRECTORY) {
         $full_path .= '/';
       }
-      $output[] = array('/'.$full_path, null, substr(md5($full_path), 0, 7));
+      $output[] = array('/'.$full_path, null, @substr(md5($full_path), 0, 7));
     }
 
     return id(new AphrontAjaxResponse())->setContent($output);
diff --git a/src/applications/diffusion/controller/DiffusionRepositoryController.php b/src/applications/diffusion/controller/DiffusionRepositoryController.php
--- a/src/applications/diffusion/controller/DiffusionRepositoryController.php
+++ b/src/applications/diffusion/controller/DiffusionRepositoryController.php
@@ -412,7 +412,7 @@
       ->setUser($viewer);
 
     $description = $repository->getDetail('description');
-    if (strlen($description)) {
+    if (@strlen($description)) {
       $description = new PHUIRemarkupView($viewer, $description);
       $view->addTextContent($description);
       return id(new PHUIObjectBoxView())
@@ -560,7 +560,7 @@
 
     $repository_name = $repository->getName();
     $branch_name = $drequest->getBranch();
-    if (strlen($branch_name)) {
+    if (@strlen($branch_name)) {
       $repository_name .= ' ('.$branch_name.')';
     }
 
diff --git a/src/applications/diffusion/controller/DiffusionRepositoryManagePanelsController.php b/src/applications/diffusion/controller/DiffusionRepositoryManagePanelsController.php
--- a/src/applications/diffusion/controller/DiffusionRepositoryManagePanelsController.php
+++ b/src/applications/diffusion/controller/DiffusionRepositoryManagePanelsController.php
@@ -40,7 +40,7 @@
     }
 
     $selected = $request->getURIData('panel');
-    if (!strlen($selected)) {
+    if (!@strlen($selected)) {
       $selected = head_key($panels);
     }
 
diff --git a/src/applications/diffusion/controller/DiffusionRepositoryURICredentialController.php b/src/applications/diffusion/controller/DiffusionRepositoryURICredentialController.php
--- a/src/applications/diffusion/controller/DiffusionRepositoryURICredentialController.php
+++ b/src/applications/diffusion/controller/DiffusionRepositoryURICredentialController.php
@@ -117,7 +117,7 @@
         ->setOptions($options);
 
       $default_user = $effective_uri->getUser();
-      if (strlen($default_user)) {
+      if (@strlen($default_user)) {
         $control->setDefaultUsername($default_user);
       }
 
diff --git a/src/applications/diffusion/controller/DiffusionServeController.php b/src/applications/diffusion/controller/DiffusionServeController.php
--- a/src/applications/diffusion/controller/DiffusionServeController.php
+++ b/src/applications/diffusion/controller/DiffusionServeController.php
@@ -64,7 +64,7 @@
     } else if ($content_type == 'application/x-git-receive-pack-request') {
       // We get this for `git-receive-pack`.
       $vcs = PhabricatorRepositoryType::REPOSITORY_TYPE_GIT;
-    } else if (preg_match($lfs_pattern, $content_type)) {
+    } else if (@preg_match($lfs_pattern, $content_type)) {
       // This is a Git LFS HTTP API request.
       $vcs = PhabricatorRepositoryType::REPOSITORY_TYPE_GIT;
       $this->isGitLFSRequest = true;
@@ -183,8 +183,8 @@
     // won't prompt users who provide a username but no password otherwise.
     // See T10797 for discussion.
 
-    $have_user = strlen(idx($_SERVER, 'PHP_AUTH_USER'));
-    $have_pass = strlen(idx($_SERVER, 'PHP_AUTH_PW'));
+    $have_user = @strlen(idx($_SERVER, 'PHP_AUTH_USER'));
+    $have_pass = @strlen(idx($_SERVER, 'PHP_AUTH_PW'));
     if ($have_user && $have_pass) {
       $username = $_SERVER['PHP_AUTH_USER'];
       $password = new PhutilOpaqueEnvelope($_SERVER['PHP_AUTH_PW']);
@@ -677,7 +677,7 @@
 
       $known = implode('|', $known);
 
-      if (preg_match('@^/([^/]+)/('.$known.')(/|$)@', $base_path)) {
+      if (@preg_match('@^/([^/]+)/('.$known.')(/|$)@', $base_path)) {
         $base_path = preg_replace('@^/([^/]+)@', '', $base_path);
       }
     }
@@ -761,12 +761,12 @@
       return null;
     }
 
-    if (!strlen($username)) {
+    if (!@strlen($username)) {
       // No username.
       return null;
     }
 
-    if (!strlen($password->openEnvelope())) {
+    if (!@strlen($password->openEnvelope())) {
       // No password.
       return null;
     }
@@ -823,8 +823,8 @@
     $args = $this->getMercurialArguments();
     $args = $this->formatMercurialArguments($cmd, $args);
 
-    if (strlen($input)) {
-      $input = strlen($input)."\n".$input."0\n";
+    if (@strlen($input)) {
+      $input = @strlen($input)."\n".$input."0\n";
     }
 
     $command = csprintf(
@@ -855,9 +855,9 @@
       // This includes diagnostic information and anything echoed by commit
       // hooks. We ignore `stdout` since it just has protocol garbage, and
       // substitute `stderr`.
-      $body = strlen($stderr)."\n".$stderr;
+      $body = @strlen($stderr)."\n".$stderr;
     } else {
-      list($length, $body) = explode("\n", $stdout, 2);
+      list($length, $body) = @explode("\n", $stdout, 2);
       if ($cmd == 'capabilities') {
         $body = DiffusionMercurialWireProtocol::filterBundle2Capability($body);
       }
@@ -902,7 +902,7 @@
       }
       if (isset($arguments[$arg_key])) {
         $value = $arguments[$arg_key];
-        $size = strlen($value);
+        $size = @strlen($value);
         $out[] = "{$arg_key} {$size}\n{$value}";
         unset($arguments[$arg_key]);
       }
@@ -928,7 +928,7 @@
           // We already added this argument above, so skip it.
           continue;
         }
-        $size = strlen($value);
+        $size = @strlen($value);
         $out[] = "{$key} {$size}\n{$value}";
       }
     }
@@ -956,10 +956,10 @@
 
     $stdout_regexp = '(^Content-Type: application/x-git-upload-pack-result)m';
 
-    $has_pack = preg_match($stdout_regexp, $stdout);
+    $has_pack = @preg_match($stdout_regexp, $stdout);
 
-    if (strlen($stdout) >= 4) {
-      $has_flush_packet = (substr($stdout, -4) === "0000");
+    if (@strlen($stdout) >= 4) {
+      $has_flush_packet = (@substr($stdout, -4) === "0000");
     } else {
       $has_flush_packet = false;
     }
@@ -1024,7 +1024,7 @@
     $path = $this->getGitLFSRequestPath($repository);
     $matches = null;
 
-    if (preg_match('(^upload/(.*)\z)', $path, $matches)) {
+    if (@preg_match('(^upload/(.*)\z)', $path, $matches)) {
       $oid = $matches[1];
       return $this->serveGitLFSUploadRequest($repository, $viewer, $oid);
     } else if ($path == 'objects/batch') {
@@ -1261,7 +1261,7 @@
     $request_path = $this->getRequestDirectoryPath($repository);
 
     $matches = null;
-    if (preg_match('(^/info/lfs(?:\z|/)(.*))', $request_path, $matches)) {
+    if (@preg_match('(^/info/lfs(?:\z|/)(.*))', $request_path, $matches)) {
       return $matches[1];
     }
 
diff --git a/src/applications/diffusion/controller/DiffusionSymbolController.php b/src/applications/diffusion/controller/DiffusionSymbolController.php
--- a/src/applications/diffusion/controller/DiffusionSymbolController.php
+++ b/src/applications/diffusion/controller/DiffusionSymbolController.php
@@ -28,7 +28,7 @@
     $repos = array();
     if ($request->getStr('repositories')) {
       $phids = $request->getStr('repositories');
-      $phids = explode(',', $phids);
+      $phids = @explode(',', $phids);
       $phids = array_filter($phids);
 
       if ($phids) {
diff --git a/src/applications/diffusion/controller/DiffusionTagListController.php b/src/applications/diffusion/controller/DiffusionTagListController.php
--- a/src/applications/diffusion/controller/DiffusionTagListController.php
+++ b/src/applications/diffusion/controller/DiffusionTagListController.php
@@ -25,7 +25,7 @@
       'offset' => $pager->getOffset(),
     );
 
-    if (strlen($drequest->getSymbolicCommit())) {
+    if (@strlen($drequest->getSymbolicCommit())) {
       $is_commit = true;
       $params['commit'] = $drequest->getSymbolicCommit();
     } else {
diff --git a/src/applications/diffusion/data/DiffusionBrowseResultSet.php b/src/applications/diffusion/data/DiffusionBrowseResultSet.php
--- a/src/applications/diffusion/data/DiffusionBrowseResultSet.php
+++ b/src/applications/diffusion/data/DiffusionBrowseResultSet.php
@@ -100,7 +100,7 @@
       }
 
       $local_path = $path_object->getPath();
-      if (!preg_match('/^readme(\.|$)/i', $local_path)) {
+      if (!@preg_match('/^readme(\.|$)/i', $local_path)) {
         // Skip files not named "README".
         continue;
       }
@@ -132,7 +132,7 @@
       return 90;
     }
 
-    $ext = last(explode('.', $path));
+    $ext = last(@explode('.', $path));
     switch ($ext) {
       case 'remarkup':
         return 100;
diff --git a/src/applications/diffusion/data/DiffusionCommitRef.php b/src/applications/diffusion/data/DiffusionCommitRef.php
--- a/src/applications/diffusion/data/DiffusionCommitRef.php
+++ b/src/applications/diffusion/data/DiffusionCommitRef.php
@@ -131,11 +131,11 @@
   }
 
   private function formatUser($name, $email) {
-    if (strlen($name) && strlen($email)) {
+    if (@strlen($name) && @strlen($email)) {
       return "{$name} <{$email}>";
-    } else if (strlen($email)) {
+    } else if (@strlen($email)) {
       return $email;
-    } else if (strlen($name)) {
+    } else if (@strlen($name)) {
       return $name;
     } else {
       return null;
diff --git a/src/applications/diffusion/data/DiffusionGitBranch.php b/src/applications/diffusion/data/DiffusionGitBranch.php
--- a/src/applications/diffusion/data/DiffusionGitBranch.php
+++ b/src/applications/diffusion/data/DiffusionGitBranch.php
@@ -28,10 +28,10 @@
     $only_this_remote = null) {
     $map = array();
 
-    $lines = array_filter(explode("\n", $stdout));
+    $lines = array_filter(@explode("\n", $stdout));
     foreach ($lines as $line) {
       $matches = null;
-      if (preg_match('/^  (\S+)\s+-> (\S+)$/', $line, $matches)) {
+      if (@preg_match('/^  (\S+)\s+-> (\S+)$/', $line, $matches)) {
           // This is a line like:
           //
           //   origin/HEAD          -> origin/master
@@ -41,7 +41,7 @@
           // branch.
           continue;
       }
-      if (!preg_match('/^ *(\S+)\s+([a-z0-9]{40})/', $line, $matches)) {
+      if (!@preg_match('/^ *(\S+)\s+([a-z0-9]{40})/', $line, $matches)) {
         throw new Exception(
           pht(
             'Failed to parse %s!',
@@ -51,14 +51,14 @@
       $remote_branch = $matches[1];
       $branch_head = $matches[2];
 
-      if (strpos($remote_branch, 'HEAD') !== false) {
+      if (@strpos($remote_branch, 'HEAD') !== false) {
         // let's assume that no one will call their remote or branch HEAD
         continue;
       }
 
       if ($only_this_remote) {
         $matches = null;
-        if (!preg_match('#^([^/]+)/(.*)$#', $remote_branch, $matches)) {
+        if (!@preg_match('#^([^/]+)/(.*)$#', $remote_branch, $matches)) {
           throw new Exception(
             pht(
               "Failed to parse remote branch '%s'!",
@@ -84,11 +84,11 @@
   public static function parseLocalBranchOutput($stdout) {
     $map = array();
 
-    $lines = array_filter(explode("\n", $stdout));
+    $lines = array_filter(@explode("\n", $stdout));
     $regex = '/^[* ]*(\(no branch\)|\S+)\s+([a-z0-9]{40})/';
     foreach ($lines as $line) {
       $matches = null;
-      if (!preg_match($regex, $line, $matches)) {
+      if (!@preg_match($regex, $line, $matches)) {
         throw new Exception(
           pht(
             'Failed to parse %s!',
diff --git a/src/applications/diffusion/document/DiffusionDocumentRenderingEngine.php b/src/applications/diffusion/document/DiffusionDocumentRenderingEngine.php
--- a/src/applications/diffusion/document/DiffusionDocumentRenderingEngine.php
+++ b/src/applications/diffusion/document/DiffusionDocumentRenderingEngine.php
@@ -87,7 +87,7 @@
     $ref->setSymbolMetadata($this->getSymbolMetadata());
 
     $coverage = $drequest->loadCoverage();
-    if (strlen($coverage)) {
+    if (@strlen($coverage)) {
       $ref->addCoverage($coverage);
     }
   }
@@ -99,7 +99,7 @@
     $symbol_repos = nonempty($repo->getSymbolSources(), array());
     $symbol_repos[] = $repo->getPHID();
 
-    $lang = last(explode('.', $drequest->getPath()));
+    $lang = last(@explode('.', $drequest->getPath()));
 
     return array(
       'repositories' => $symbol_repos,
diff --git a/src/applications/diffusion/engine/DiffusionCommitHookEngine.php b/src/applications/diffusion/engine/DiffusionCommitHookEngine.php
--- a/src/applications/diffusion/engine/DiffusionCommitHookEngine.php
+++ b/src/applications/diffusion/engine/DiffusionCommitHookEngine.php
@@ -384,7 +384,7 @@
       $this->rejectDetails = $rule->getPHID();
 
       $message = $blocking_effect->getTarget();
-      if (!strlen($message)) {
+      if (!@strlen($message)) {
         $message = pht('(None.)');
       }
 
@@ -437,7 +437,7 @@
     $stdin = $this->getStdin();
     $lines = phutil_split_lines($stdin, $retain_endings = false);
     foreach ($lines as $line) {
-      $parts = explode(' ', $line, 3);
+      $parts = @explode(' ', $line, 3);
       if (count($parts) != 3) {
         throw new Exception(pht('Expected "old new ref", got "%s".', $line));
       }
@@ -446,12 +446,12 @@
       $ref_new = $parts[1];
       $ref_raw = $parts[2];
 
-      if (preg_match('(^refs/heads/)', $ref_raw)) {
+      if (@preg_match('(^refs/heads/)', $ref_raw)) {
         $ref_type = PhabricatorRepositoryPushLog::REFTYPE_BRANCH;
-        $ref_raw = substr($ref_raw, strlen('refs/heads/'));
-      } else if (preg_match('(^refs/tags/)', $ref_raw)) {
+        $ref_raw = @substr($ref_raw, @strlen('refs/heads/'));
+      } else if (@preg_match('(^refs/tags/)', $ref_raw)) {
         $ref_type = PhabricatorRepositoryPushLog::REFTYPE_TAG;
-        $ref_raw = substr($ref_raw, strlen('refs/tags/'));
+        $ref_raw = @substr($ref_raw, @strlen('refs/tags/'));
       } else {
         $ref_type = PhabricatorRepositoryPushLog::REFTYPE_REF;
       }
@@ -613,7 +613,7 @@
     foreach ($futures as $key => $future) {
       list($stdout) = $future->resolvex();
 
-      if (!strlen(trim($stdout))) {
+      if (!@strlen(trim($stdout))) {
         // This change doesn't have any new commits. One common case of this
         // is creating a new tag which points at an existing commit.
         continue;
@@ -847,7 +847,7 @@
 
         foreach (new FutureIterator($dfutures) as $future_head => $dfuture) {
           list($stdout) = $dfuture->resolvex();
-          $descendant_heads = array_filter(explode("\1", $stdout));
+          $descendant_heads = array_filter(@explode("\1", $stdout));
           if ($descendant_heads) {
             // This old head has at least one descendant in the push.
             $head_map[$future_head] = $descendant_heads;
@@ -898,7 +898,7 @@
           if ($splits_existing_head || $creates_duplicate_head) {
             $readable_child_heads = array();
             foreach ($child_heads as $child_head) {
-              $readable_child_heads[] = substr($child_head, 0, 12);
+              $readable_child_heads[] = @substr($child_head, 0, 12);
             }
 
             $ref_flags |= PhabricatorRepositoryPushLog::CHANGEFLAG_DANGEROUS;
@@ -972,12 +972,12 @@
     $key_name = getenv('HG_KEY');
 
     $key_old = getenv('HG_OLD');
-    if (!strlen($key_old)) {
+    if (!@strlen($key_old)) {
       $key_old = null;
     }
 
     $key_new = getenv('HG_NEW');
-    if (!strlen($key_new)) {
+    if (!@strlen($key_new)) {
       $key_new = null;
     }
 
@@ -1010,7 +1010,7 @@
         '{node}',
         hgsprintf('ancestor(%s, %s)', $key_old, $key_new));
 
-      if (strlen(trim($merge_base_raw))) {
+      if (@strlen(trim($merge_base_raw))) {
         $merge_base = trim($merge_base_raw);
       }
 
@@ -1045,11 +1045,11 @@
   }
 
   private function parseMercurialCommits($raw) {
-    $commits_lines = explode("\2", $raw);
+    $commits_lines = @explode("\2", $raw);
     $commits_lines = array_filter($commits_lines);
     $commit_map = array();
     foreach ($commits_lines as $commit_line) {
-      list($node, $branch) = explode("\1", $commit_line);
+      list($node, $branch) = @explode("\1", $commit_line);
       $commit_map[$node] = array($branch);
     }
 
@@ -1133,7 +1133,7 @@
       ->setHookWait(phutil_microseconds_since($hook_start));
 
     $identifier = $this->getRequestIdentifier();
-    if (strlen($identifier)) {
+    if (@strlen($identifier)) {
       $event->setRequestIdentifier($identifier);
     }
 
@@ -1225,7 +1225,7 @@
         throw new Exception(pht("Unknown VCS '%s!'", $vcs));
     }
 
-    if (strlen($raw_diff) >= $byte_limit) {
+    if (@strlen($raw_diff) >= $byte_limit) {
       throw new Exception(
         pht(
           'The raw text of this change ("%s") is enormous (larger than %s '.
@@ -1234,7 +1234,7 @@
           new PhutilNumber($byte_limit)));
     }
 
-    if (!strlen($raw_diff)) {
+    if (!@strlen($raw_diff)) {
       // If the commit is actually empty, just return no changesets.
       return array(array(), 0);
     }
@@ -1245,7 +1245,7 @@
       $changes);
 
     $changesets = $diff->getChangesets();
-    $size = strlen($raw_diff);
+    $size = @strlen($raw_diff);
 
     return array($changesets, $size);
   }
diff --git a/src/applications/diffusion/engineextension/DiffusionDatasourceEngineExtension.php b/src/applications/diffusion/engineextension/DiffusionDatasourceEngineExtension.php
--- a/src/applications/diffusion/engineextension/DiffusionDatasourceEngineExtension.php
+++ b/src/applications/diffusion/engineextension/DiffusionDatasourceEngineExtension.php
@@ -14,18 +14,18 @@
     $viewer = $this->getViewer();
 
     // Send "r" to Diffusion.
-    if (preg_match('/^r\z/i', $query)) {
+    if (@preg_match('/^r\z/i', $query)) {
       return '/diffusion/';
     }
 
     // Send "a" to the commit list ("Audit").
-    if (preg_match('/^a\z/i', $query)) {
+    if (@preg_match('/^a\z/i', $query)) {
       return '/diffusion/commit/';
     }
 
     // Send "r <string>" to a search for a matching repository.
     $matches = null;
-    if (preg_match('/^r\s+(.+)\z/i', $query, $matches)) {
+    if (@preg_match('/^r\s+(.+)\z/i', $query, $matches)) {
       $raw_query = $matches[1];
 
       $engine = id(new PhabricatorRepository())
@@ -60,11 +60,11 @@
 
     // Send "s <string>" to a symbol search.
     $matches = null;
-    if (preg_match('/^s\s+(.+)\z/i', $query, $matches)) {
+    if (@preg_match('/^s\s+(.+)\z/i', $query, $matches)) {
       $symbol = $matches[1];
 
       $parts = null;
-      if (preg_match('/(.*)(?:\\.|::|->)(.*)/', $symbol, $parts)) {
+      if (@preg_match('/(.*)(?:\\.|::|->)(.*)/', $symbol, $parts)) {
         return urisprintf(
           '/diffusion/symbol/%p/?jump=true&context=%s',
           $parts[2],
diff --git a/src/applications/diffusion/engineextension/DiffusionSourceHyperlinkEngineExtension.php b/src/applications/diffusion/engineextension/DiffusionSourceHyperlinkEngineExtension.php
--- a/src/applications/diffusion/engineextension/DiffusionSourceHyperlinkEngineExtension.php
+++ b/src/applications/diffusion/engineextension/DiffusionSourceHyperlinkEngineExtension.php
@@ -30,7 +30,7 @@
         '/(?P<blob>.*)'.
         '\z)';
       $matches = null;
-      if (!preg_match($pattern, $path, $matches)) {
+      if (!@preg_match($pattern, $path, $matches)) {
         continue;
       }
 
diff --git a/src/applications/diffusion/herald/DiffusionPreCommitUsesGitLFSHeraldField.php b/src/applications/diffusion/herald/DiffusionPreCommitUsesGitLFSHeraldField.php
--- a/src/applications/diffusion/herald/DiffusionPreCommitUsesGitLFSHeraldField.php
+++ b/src/applications/diffusion/herald/DiffusionPreCommitUsesGitLFSHeraldField.php
@@ -26,7 +26,7 @@
     $pattern = '(^version\s*https://git-lfs.github.com/spec/)i';
 
     foreach ($map as $path => $content) {
-      if (preg_match($pattern, $content)) {
+      if (@preg_match($pattern, $content)) {
         return true;
       }
     }
diff --git a/src/applications/diffusion/herald/HeraldPreCommitContentAdapter.php b/src/applications/diffusion/herald/HeraldPreCommitContentAdapter.php
--- a/src/applications/diffusion/herald/HeraldPreCommitContentAdapter.php
+++ b/src/applications/diffusion/herald/HeraldPreCommitContentAdapter.php
@@ -102,7 +102,7 @@
       case PhabricatorRepositoryType::REPOSITORY_TYPE_MERCURIAL:
         $ref = $this->getCommitRef();
         $author = $ref->getAuthor();
-        if (!strlen($author)) {
+        if (!@strlen($author)) {
           return null;
         }
         return $this->lookupUser($author);
@@ -123,7 +123,7 @@
         // can't resolve it, return `null`.
         $ref = $this->getCommitRef();
         $committer = $ref->getCommitter();
-        if (!strlen($committer)) {
+        if (!@strlen($committer)) {
           return $this->getAuthorPHID();
         }
         return $this->lookupUser($committer);
@@ -157,7 +157,7 @@
         // instead.
         $ref = $this->getCommitRef();
         $committer = $ref->getCommitter();
-        if (strlen($committer)) {
+        if (@strlen($committer)) {
           return $committer;
         }
         return $ref->getAuthor();
diff --git a/src/applications/diffusion/management/DiffusionRepositoryBasicsManagementPanel.php b/src/applications/diffusion/management/DiffusionRepositoryBasicsManagementPanel.php
--- a/src/applications/diffusion/management/DiffusionRepositoryBasicsManagementPanel.php
+++ b/src/applications/diffusion/management/DiffusionRepositoryBasicsManagementPanel.php
@@ -220,7 +220,7 @@
     $view->addProperty(pht('Type'), $type);
 
     $callsign = $repository->getCallsign();
-    if (!strlen($callsign)) {
+    if (!@strlen($callsign)) {
       $callsign = phutil_tag('em', array(), pht('No Callsign'));
     }
     $view->addProperty(pht('Callsign'), $callsign);
@@ -277,7 +277,7 @@
 
     $view = id(new PHUIPropertyListView())
       ->setViewer($viewer);
-    if (!strlen($description)) {
+    if (!@strlen($description)) {
       return null;
     } else {
       $description = new PHUIRemarkupView($viewer, $description);
@@ -452,7 +452,7 @@
       if ($svnlook_check) {
         $where = Filesystem::resolveBinary('svnlook');
         if ($where) {
-          $path = substr($where, 0, strlen($where) - strlen('svnlook'));
+          $path = @substr($where, 0, @strlen($where) - @strlen('svnlook'));
           $dirs = PhabricatorEnv::getEnvConfig('environment.append-paths');
           $in_path = false;
           foreach ($dirs as $dir) {
@@ -624,7 +624,7 @@
           $message = $message->getParameter('message');
 
           $suggestion = null;
-          if (preg_match('/Permission denied \(publickey\)./', $message)) {
+          if (@preg_match('/Permission denied \(publickey\)./', $message)) {
             $suggestion = pht(
               'Public Key Error: This error usually indicates that the '.
               'keypair you have configured does not have permission to '.
diff --git a/src/applications/diffusion/panel/DiffusionSetPasswordSettingsPanel.php b/src/applications/diffusion/panel/DiffusionSetPasswordSettingsPanel.php
--- a/src/applications/diffusion/panel/DiffusionSetPasswordSettingsPanel.php
+++ b/src/applications/diffusion/panel/DiffusionSetPasswordSettingsPanel.php
@@ -160,7 +160,7 @@
 
       $suggest = Filesystem::readRandomBytes(128);
       $suggest = preg_replace('([^A-Za-z0-9/!().,;{}^&*%~])', '', $suggest);
-      $suggest = substr($suggest, 0, 20);
+      $suggest = @substr($suggest, 0, 20);
 
       if ($is_serious) {
         $form->appendRemarkupInstructions(
@@ -195,7 +195,7 @@
         ->setLabel(pht('Best Available Algorithm'))
         ->setValue(PhabricatorPasswordHasher::getBestAlgorithmName()));
 
-    if (strlen($hash_envelope->openEnvelope())) {
+    if (@strlen($hash_envelope->openEnvelope())) {
       try {
         $can_upgrade = PhabricatorPasswordHasher::canUpgradeHash(
           $hash_envelope);
diff --git a/src/applications/diffusion/protocol/DiffusionGitUploadPackWireProtocol.php b/src/applications/diffusion/protocol/DiffusionGitUploadPackWireProtocol.php
--- a/src/applications/diffusion/protocol/DiffusionGitUploadPackWireProtocol.php
+++ b/src/applications/diffusion/protocol/DiffusionGitUploadPackWireProtocol.php
@@ -31,7 +31,7 @@
           if ($len < 4) {
             if ($len > 0) {
               $bytes = $this->peekBytes($len);
-              if (!preg_match('/^[0-9a-f]+\z/', $bytes)) {
+              if (!@preg_match('/^[0-9a-f]+\z/', $bytes)) {
                 throw new Exception(
                   pht(
                     'Bad frame length character in Git protocol ("%s"), '.
@@ -157,7 +157,7 @@
   private function newProtocolFrame($type, $bytes) {
     return array(
       'type' => $type,
-      'length' => strlen($bytes),
+      'length' => @strlen($bytes),
       'bytes' => $bytes,
     );
   }
@@ -208,7 +208,7 @@
         $capabilities_pattern = '';
       }
 
-      $ok = preg_match(
+      $ok = @preg_match(
         '('.
           '^'.
           '(?:'.
diff --git a/src/applications/diffusion/protocol/DiffusionMercurialCommandEngine.php b/src/applications/diffusion/protocol/DiffusionMercurialCommandEngine.php
--- a/src/applications/diffusion/protocol/DiffusionMercurialCommandEngine.php
+++ b/src/applications/diffusion/protocol/DiffusionMercurialCommandEngine.php
@@ -23,7 +23,7 @@
       ->splitArguments($test_command);
 
     foreach ($test_args as $test_arg) {
-      if (preg_match('/^--(config|debugger)/i', $test_arg)) {
+      if (@preg_match('/^--(config|debugger)/i', $test_arg)) {
         throw new DiffusionMercurialFlagInjectionException(
           pht(
             'Mercurial command appears to contain unsafe injected "--config" '.
diff --git a/src/applications/diffusion/protocol/DiffusionMercurialWireProtocol.php b/src/applications/diffusion/protocol/DiffusionMercurialWireProtocol.php
--- a/src/applications/diffusion/protocol/DiffusionMercurialWireProtocol.php
+++ b/src/applications/diffusion/protocol/DiffusionMercurialWireProtocol.php
@@ -65,7 +65,7 @@
   }
 
   public static function isReadOnlyBatchCommand($cmds) {
-    if (!strlen($cmds)) {
+    if (!@strlen($cmds)) {
       // We expect a "batch" command to always have a "cmds" string, so err
       // on the side of caution and throw if we don't get any data here. This
       // either indicates a mangled command from the client or a programming
@@ -93,9 +93,9 @@
     //
     // So just split unconditionally.
 
-    $cmds = explode(';', $cmds);
+    $cmds = @explode(';', $cmds);
     foreach ($cmds as $sub_cmd) {
-      $name = head(explode(' ', $sub_cmd, 2));
+      $name = head(@explode(' ', $sub_cmd, 2));
       if (!self::isReadOnlyCommand($name)) {
         return false;
       }
@@ -124,9 +124,9 @@
    *   to replace the original $body to send back to client.
    */
   public static function filterBundle2Capability($capabilities) {
-    $parts = explode(' ', $capabilities);
+    $parts = @explode(' ', $capabilities);
     foreach ($parts as $key => $part) {
-      if (preg_match('/^bundle2=/', $part)) {
+      if (@preg_match('/^bundle2=/', $part)) {
         unset($parts[$key]);
         break;
       }
diff --git a/src/applications/diffusion/protocol/DiffusionSubversionWireProtocol.php b/src/applications/diffusion/protocol/DiffusionSubversionWireProtocol.php
--- a/src/applications/diffusion/protocol/DiffusionSubversionWireProtocol.php
+++ b/src/applications/diffusion/protocol/DiffusionSubversionWireProtocol.php
@@ -38,15 +38,15 @@
         // protocol requires at least one space, but allows more than one.
 
         $matches = null;
-        if (!preg_match('/^(\s*)\S/', $this->buffer, $matches)) {
+        if (!@preg_match('/^(\s*)\S/', $this->buffer, $matches)) {
          // Wait for more data.
           break;
         }
 
         // We have zero or more spaces and then some other character, so throw
         // the spaces away and continue parsing frames.
-        if (strlen($matches[1])) {
-          $this->buffer = substr($this->buffer, strlen($matches[1]));
+        if (@strlen($matches[1])) {
+          $this->buffer = @substr($this->buffer, @strlen($matches[1]));
         }
 
         $this->state = 'item';
@@ -54,17 +54,17 @@
         $match = null;
         $result = null;
         $buf = $this->buffer;
-        if (preg_match('/^([a-z][a-z0-9-]*)\s/i', $buf, $match)) {
+        if (@preg_match('/^([a-z][a-z0-9-]*)\s/i', $buf, $match)) {
           $this->pushItem($match[1], 'word');
-        } else if (preg_match('/^(\d+)\s/', $buf, $match)) {
+        } else if (@preg_match('/^(\d+)\s/', $buf, $match)) {
           $this->pushItem((int)$match[1], 'number');
-        } else if (preg_match('/^(\d+):/', $buf, $match)) {
+        } else if (@preg_match('/^(\d+):/', $buf, $match)) {
           // NOTE: The "+ 1" includes the space after the string.
           $this->expectBytes = (int)$match[1] + 1;
           $this->state = 'bytes';
-        } else if (preg_match('/^(\\()\s/', $buf, $match)) {
+        } else if (@preg_match('/^(\\()\s/', $buf, $match)) {
           $this->pushList();
-        } else if (preg_match('/^(\\))\s/', $buf, $match)) {
+        } else if (@preg_match('/^(\\))\s/', $buf, $match)) {
           $list = $this->popList();
           if ($this->stack) {
             $this->pushItem($list, 'list');
@@ -76,8 +76,8 @@
         }
 
         if ($match !== false) {
-          $this->raw .= substr($this->buffer, 0, strlen($match[0]));
-          $this->buffer = substr($this->buffer, strlen($match[0]));
+          $this->raw .= @substr($this->buffer, 0, @strlen($match[0]));
+          $this->buffer = @substr($this->buffer, @strlen($match[0]));
 
           if ($result !== null) {
             $messages[] = array(
@@ -97,21 +97,21 @@
           break;
         }
       } else if ($this->state == 'bytes') {
-        $new_data = substr($this->buffer, 0, $this->expectBytes);
-        if (!strlen($new_data)) {
+        $new_data = @substr($this->buffer, 0, $this->expectBytes);
+        if (!@strlen($new_data)) {
           // No more bytes available yet, wait for more data.
           break;
         }
-        $this->buffer = substr($this->buffer, strlen($new_data));
+        $this->buffer = @substr($this->buffer, @strlen($new_data));
 
-        $this->expectBytes -= strlen($new_data);
+        $this->expectBytes -= @strlen($new_data);
         $this->raw .= $new_data;
         $this->byteBuffer .= $new_data;
 
         if (!$this->expectBytes) {
           $this->state = 'byte-space';
           // Strip off the terminal space.
-          $this->pushItem(substr($this->byteBuffer, 0, -1), 'string');
+          $this->pushItem(@substr($this->byteBuffer, 0, -1), 'string');
           $this->byteBuffer = '';
           $this->state = 'space';
         }
@@ -141,7 +141,7 @@
           $out[] = $value;
           break;
         case 'string':
-          $out[] = strlen($value).':'.$value;
+          $out[] = @strlen($value).':'.$value;
           break;
         case 'list':
           $out[] = self::serializeStruct($value);
diff --git a/src/applications/diffusion/query/DiffusionCachedResolveRefsQuery.php b/src/applications/diffusion/query/DiffusionCachedResolveRefsQuery.php
--- a/src/applications/diffusion/query/DiffusionCachedResolveRefsQuery.php
+++ b/src/applications/diffusion/query/DiffusionCachedResolveRefsQuery.php
@@ -69,7 +69,7 @@
     foreach ($this->refs as $ref) {
       // We require refs to look like hashes and be at least 4 characters
       // long. This is similar to the behavior of git.
-      if (preg_match('/^[a-f0-9]{4,}$/', $ref)) {
+      if (@preg_match('/^[a-f0-9]{4,}$/', $ref)) {
         $prefixes[] = qsprintf(
           $conn_r,
           '(commitIdentifier LIKE %>)',
@@ -89,7 +89,7 @@
       foreach ($commits as $commit) {
         $hash = $commit['commitIdentifier'];
         foreach ($this->refs as $ref) {
-          if (!strncmp($hash, $ref, strlen($ref))) {
+          if (!strncmp($hash, $ref, @strlen($ref))) {
             $results[$ref][] = array(
               'type' => 'commit',
               'identifier' => $hash,
@@ -162,7 +162,7 @@
         continue;
       }
 
-      if (!preg_match('/^\d+$/', $ref)) {
+      if (!@preg_match('/^\d+$/', $ref)) {
         // This ref is non-numeric, so it doesn't resolve to anything.
         continue;
       }
diff --git a/src/applications/diffusion/query/DiffusionCommitQuery.php b/src/applications/diffusion/query/DiffusionCommitQuery.php
--- a/src/applications/diffusion/query/DiffusionCommitQuery.php
+++ b/src/applications/diffusion/query/DiffusionCommitQuery.php
@@ -330,8 +330,8 @@
         } else {
           // This awkward construction is so we can link the commits up in O(N)
           // time instead of O(N^2).
-          for ($ii = $min_qualified; $ii <= strlen($suffix); $ii++) {
-            $part = substr($suffix, 0, $ii);
+          for ($ii = $min_qualified; $ii <= @strlen($suffix); $ii++) {
+            $part = @substr($suffix, 0, $ii);
             foreach ($prefixes as $prefix) {
               if (isset($ids[$prefix.$part])) {
                 $result[$prefix.$part][] = $commit;
@@ -714,7 +714,7 @@
       $bare = array();
       foreach ($this->identifiers as $identifier) {
         $matches = null;
-        preg_match('/^(?:[rR]([A-Z]+:?|[0-9]+:))?(.*)$/',
+        @preg_match('/^(?:[rR]([A-Z]+:?|[0-9]+:))?(.*)$/',
           $identifier, $matches);
         $repo = nonempty(rtrim($matches[1], ':'), null);
         $commit_identifier = nonempty($matches[2], null);
@@ -726,7 +726,7 @@
         }
 
         if ($repo === null) {
-          if (strlen($commit_identifier) < $min_unqualified) {
+          if (@strlen($commit_identifier) < $min_unqualified) {
             continue;
           }
           $bare[] = $commit_identifier;
@@ -776,12 +776,12 @@
               // See T3377.
               (int)$ref['identifier']);
           } else {
-            if (strlen($ref['identifier']) < $min_qualified) {
+            if (@strlen($ref['identifier']) < $min_qualified) {
               continue;
             }
 
             $identifier = $ref['identifier'];
-            if (strlen($identifier) == 40) {
+            if (@strlen($identifier) == 40) {
               // MySQL seems to do slightly better with this version if the
               // clause, so issue it if we have a full commit hash.
               $sql[] = qsprintf(
diff --git a/src/applications/diffusion/query/DiffusionLintCountQuery.php b/src/applications/diffusion/query/DiffusionLintCountQuery.php
--- a/src/applications/diffusion/query/DiffusionLintCountQuery.php
+++ b/src/applications/diffusion/query/DiffusionLintCountQuery.php
@@ -99,7 +99,7 @@
     $paths = array();
     foreach ($this->paths as $path) {
       $path = '/'.$path;
-      if (substr($path, -1) == '/') {
+      if (@substr($path, -1) == '/') {
         $dirs[] = $path;
       } else {
         $paths[] = $path;
@@ -114,7 +114,7 @@
     // Strip the leading "/" back off each path.
     $output = array();
     foreach ($data as $path => $count) {
-      $output[substr($path, 1)] = $count;
+      $output[@substr($path, 1)] = $count;
     }
 
     return $output;
diff --git a/src/applications/diffusion/query/DiffusionResolveUserQuery.php b/src/applications/diffusion/query/DiffusionResolveUserQuery.php
--- a/src/applications/diffusion/query/DiffusionResolveUserQuery.php
+++ b/src/applications/diffusion/query/DiffusionResolveUserQuery.php
@@ -19,7 +19,7 @@
   }
 
   private function findUserPHID($user_name) {
-    if (!strlen($user_name)) {
+    if (!@strlen($user_name)) {
       return null;
     }
 
diff --git a/src/applications/diffusion/query/blame/DiffusionBlameQuery.php b/src/applications/diffusion/query/blame/DiffusionBlameQuery.php
--- a/src/applications/diffusion/query/blame/DiffusionBlameQuery.php
+++ b/src/applications/diffusion/query/blame/DiffusionBlameQuery.php
@@ -136,10 +136,10 @@
 
     // Decode the cache storage format.
     foreach ($results as $path => $cache) {
-      list($head, $body) = explode("\n", $cache, 2);
+      list($head, $body) = @explode("\n", $cache, 2);
       switch ($head) {
         case 'raw':
-          $body = explode("\n", $body);
+          $body = @explode("\n", $body);
           break;
         default:
           $body = null;
diff --git a/src/applications/diffusion/query/blame/DiffusionGitBlameQuery.php b/src/applications/diffusion/query/blame/DiffusionGitBlameQuery.php
--- a/src/applications/diffusion/query/blame/DiffusionGitBlameQuery.php
+++ b/src/applications/diffusion/query/blame/DiffusionGitBlameQuery.php
@@ -28,7 +28,7 @@
 
     $lines = phutil_split_lines($stdout);
     foreach ($lines as $line) {
-      list($commit) = explode(' ', $line, 2);
+      list($commit) = @explode(' ', $line, 2);
       $result[] = $commit;
     }
 
diff --git a/src/applications/diffusion/query/blame/DiffusionMercurialBlameQuery.php b/src/applications/diffusion/query/blame/DiffusionMercurialBlameQuery.php
--- a/src/applications/diffusion/query/blame/DiffusionMercurialBlameQuery.php
+++ b/src/applications/diffusion/query/blame/DiffusionMercurialBlameQuery.php
@@ -26,7 +26,7 @@
 
     $lines = phutil_split_lines($stdout);
     foreach ($lines as $line) {
-      list($commit) = explode(':', $line, 2);
+      list($commit) = @explode(':', $line, 2);
       $result[] = $commit;
     }
 
diff --git a/src/applications/diffusion/query/blame/DiffusionSvnBlameQuery.php b/src/applications/diffusion/query/blame/DiffusionSvnBlameQuery.php
--- a/src/applications/diffusion/query/blame/DiffusionSvnBlameQuery.php
+++ b/src/applications/diffusion/query/blame/DiffusionSvnBlameQuery.php
@@ -23,7 +23,7 @@
 
     $lines = phutil_split_lines($stdout);
     foreach ($lines as $line) {
-      if (preg_match('/^\s*(\d+)/', $line, $matches)) {
+      if (@preg_match('/^\s*(\d+)/', $line, $matches)) {
         $result[] = (int)$matches[1];
       } else {
         $result[] = null;
diff --git a/src/applications/diffusion/query/lowlevel/DiffusionLowLevelCommitQuery.php b/src/applications/diffusion/query/lowlevel/DiffusionLowLevelCommitQuery.php
--- a/src/applications/diffusion/query/lowlevel/DiffusionLowLevelCommitQuery.php
+++ b/src/applications/diffusion/query/lowlevel/DiffusionLowLevelCommitQuery.php
@@ -16,7 +16,7 @@
   }
 
   protected function executeQuery() {
-    if (!strlen($this->identifier)) {
+    if (!@strlen($this->identifier)) {
       throw new PhutilInvalidStateException('withIdentifier');
     }
 
@@ -91,7 +91,7 @@
       $argv,
       gitsprintf('%s', $this->identifier));
 
-    $parts = explode("\0", $info);
+    $parts = @explode("\0", $info);
     $encoding = array_shift($parts);
 
     foreach ($parts as $key => $part) {
@@ -99,7 +99,7 @@
         $part = phutil_utf8_convert($part, 'UTF-8', $encoding);
       }
       $parts[$key] = phutil_utf8ize($part);
-      if (!strlen($parts[$key])) {
+      if (!@strlen($parts[$key])) {
         $parts[$key] = null;
       }
     }
@@ -126,11 +126,11 @@
       $head = $parts[6];
       $tail = $parts[7];
 
-      if (strlen($head) && strlen($tail)) {
+      if (@strlen($head) && @strlen($tail)) {
         $body = $head."\n\n".$tail;
-      } else if (strlen($head)) {
+      } else if (@strlen($head)) {
         $body = $head;
-      } else if (strlen($tail)) {
+      } else if (@strlen($tail)) {
         $body = $tail;
       } else {
         $body = '';
@@ -158,7 +158,7 @@
       '{author}\\n{desc}',
       hgsprintf('%s', $this->identifier));
 
-    list($author, $message) = explode("\n", $stdout, 2);
+    list($author, $message) = @explode("\n", $stdout, 2);
 
     $author = phutil_utf8ize($author);
     $message = phutil_utf8ize($message);
diff --git a/src/applications/diffusion/query/lowlevel/DiffusionLowLevelFilesizeQuery.php b/src/applications/diffusion/query/lowlevel/DiffusionLowLevelFilesizeQuery.php
--- a/src/applications/diffusion/query/lowlevel/DiffusionLowLevelFilesizeQuery.php
+++ b/src/applications/diffusion/query/lowlevel/DiffusionLowLevelFilesizeQuery.php
@@ -11,7 +11,7 @@
   }
 
   protected function executeQuery() {
-    if (!strlen($this->identifier)) {
+    if (!@strlen($this->identifier)) {
       throw new PhutilInvalidStateException('withIdentifier');
     }
 
@@ -54,7 +54,7 @@
       }
 
       list($fields, $pathname) = array_values($path_pair);
-      $fields = explode(' ', $fields);
+      $fields = @explode(' ', $fields);
 
       // Fields are:
       //
diff --git a/src/applications/diffusion/query/lowlevel/DiffusionLowLevelGitRefQuery.php b/src/applications/diffusion/query/lowlevel/DiffusionLowLevelGitRefQuery.php
--- a/src/applications/diffusion/query/lowlevel/DiffusionLowLevelGitRefQuery.php
+++ b/src/applications/diffusion/query/lowlevel/DiffusionLowLevelGitRefQuery.php
@@ -49,8 +49,8 @@
       }
     }
 
-    $branch_len = strlen($branch_prefix);
-    $tag_len = strlen($tag_prefix);
+    $branch_len = @strlen($branch_prefix);
+    $tag_len = @strlen($tag_prefix);
 
     list($stdout) = $repository->execxLocalCommand(
       'for-each-ref --sort=%s --format=%s -- %s',
@@ -59,28 +59,28 @@
       $prefix);
 
     $stdout = rtrim($stdout);
-    if (!strlen($stdout)) {
+    if (!@strlen($stdout)) {
       return array();
     }
 
     $remote_prefix = 'refs/remotes/';
-    $remote_len = strlen($remote_prefix);
+    $remote_len = @strlen($remote_prefix);
 
     // NOTE: Although git supports --count, we can't apply any offset or
     // limit logic until the very end because we may encounter a HEAD which
     // we want to discard.
 
-    $lines = explode("\n", $stdout);
+    $lines = @explode("\n", $stdout);
     $results = array();
     foreach ($lines as $line) {
       $fields = $this->extractFields($line);
 
       $refname = $fields['refname'];
       if (!strncmp($refname, $branch_prefix, $branch_len)) {
-        $short = substr($refname, $branch_len);
+        $short = @substr($refname, $branch_len);
         $type = $type_branch;
       } else if (!strncmp($refname, $tag_prefix, $tag_len)) {
-        $short = substr($refname, $tag_len);
+        $short = @substr($refname, $tag_len);
         $type = $type_tag;
       } else if (!strncmp($refname, $remote_prefix, $remote_len)) {
         // If we've found a remote ref that we didn't recognize as naming a
@@ -105,7 +105,7 @@
 
       $creator = $fields['creator'];
       $matches = null;
-      if (preg_match('/^(.*) ([0-9]+) ([0-9+-]+)$/', $creator, $matches)) {
+      if (@preg_match('/^(.*) ([0-9]+) ([0-9+-]+)$/', $creator, $matches)) {
         $fields['author'] = $matches[1];
         $fields['epoch'] = (int)$matches[2];
       } else {
@@ -160,7 +160,7 @@
    */
   private function extractFields($line) {
     $fields = $this->getFields();
-    $parts = explode("\1", $line, count($fields));
+    $parts = @explode("\1", $line, count($fields));
 
     $dict = array();
     foreach ($fields as $index => $field) {
diff --git a/src/applications/diffusion/query/lowlevel/DiffusionLowLevelMercurialBranchesQuery.php b/src/applications/diffusion/query/lowlevel/DiffusionLowLevelMercurialBranchesQuery.php
--- a/src/applications/diffusion/query/lowlevel/DiffusionLowLevelMercurialBranchesQuery.php
+++ b/src/applications/diffusion/query/lowlevel/DiffusionLowLevelMercurialBranchesQuery.php
@@ -42,10 +42,10 @@
     foreach (new FutureIterator($futures) as $key => $future) {
       list($stdout) = $future->resolvex();
 
-      $lines = explode("\2", $stdout);
+      $lines = @explode("\2", $stdout);
       $lines = array_filter($lines);
       foreach ($lines as $line) {
-        list($node, $branch) = explode("\1", $line);
+        list($node, $branch) = @explode("\1", $line);
         $id = $node.'/'.$branch;
         if (empty($branches[$id])) {
           $branches[$id] = id(new DiffusionRepositoryRef())
diff --git a/src/applications/diffusion/query/lowlevel/DiffusionLowLevelMercurialPathsQuery.php b/src/applications/diffusion/query/lowlevel/DiffusionLowLevelMercurialPathsQuery.php
--- a/src/applications/diffusion/query/lowlevel/DiffusionLowLevelMercurialPathsQuery.php
+++ b/src/applications/diffusion/query/lowlevel/DiffusionLowLevelMercurialPathsQuery.php
@@ -38,7 +38,7 @@
       $hg_paths_command,
       hgsprintf('%s', $commit),
       $prefix);
-    return explode("\0", $entire_manifest);
+    return @explode("\0", $entire_manifest);
   }
 
 }
diff --git a/src/applications/diffusion/query/lowlevel/DiffusionLowLevelParentsQuery.php b/src/applications/diffusion/query/lowlevel/DiffusionLowLevelParentsQuery.php
--- a/src/applications/diffusion/query/lowlevel/DiffusionLowLevelParentsQuery.php
+++ b/src/applications/diffusion/query/lowlevel/DiffusionLowLevelParentsQuery.php
@@ -11,7 +11,7 @@
   }
 
   protected function executeQuery() {
-    if (!strlen($this->identifier)) {
+    if (!@strlen($this->identifier)) {
       throw new PhutilInvalidStateException('withIdentifier');
     }
 
@@ -58,12 +58,12 @@
     foreach ($hashes as $key => $value) {
       // Mercurial parents look like "23:ad9f769d6f786fad9f76d9a" -- we want
       // to strip out the local rev part.
-      list($local, $global) = explode(':', $value);
+      list($local, $global) = @explode(':', $value);
       $hashes[$key] = $global;
 
       // With --debug we get 40-character hashes but also get the "000000..."
       // hash for missing parents; ignore it.
-      if (preg_match('/^0+$/', $global)) {
+      if (@preg_match('/^0+$/', $global)) {
         unset($hashes[$key]);
       }
     }
diff --git a/src/applications/diffusion/query/lowlevel/DiffusionLowLevelResolveRefsQuery.php b/src/applications/diffusion/query/lowlevel/DiffusionLowLevelResolveRefsQuery.php
--- a/src/applications/diffusion/query/lowlevel/DiffusionLowLevelResolveRefsQuery.php
+++ b/src/applications/diffusion/query/lowlevel/DiffusionLowLevelResolveRefsQuery.php
@@ -72,7 +72,7 @@
       // "git for-each-ref" when resolving only commit hashes, which happens
       // during repository updates.
 
-      if (preg_match('(^[a-f0-9]{40}\z)', $ref)) {
+      if (@preg_match('(^[a-f0-9]{40}\z)', $ref)) {
         continue;
       }
 
@@ -100,7 +100,7 @@
         foreach ($ref_map[$ref] as $result) {
           $fields = $result->getRawFields();
           $objectname = idx($fields, 'refname');
-          if (!strncmp($objectname, $tag_prefix, strlen($tag_prefix))) {
+          if (!strncmp($objectname, $tag_prefix, @strlen($tag_prefix))) {
             $type = 'tag';
           } else {
             $type = 'branch';
@@ -136,7 +136,7 @@
     $future->write(implode("\n", $unresolved));
     list($stdout) = $future->resolvex();
 
-    $lines = explode("\n", rtrim($stdout, "\n"));
+    $lines = @explode("\n", rtrim($stdout, "\n"));
     if (count($lines) !== count($unresolved)) {
       throw new Exception(
         pht(
@@ -149,7 +149,7 @@
 
     $lines = array_combine($unresolved, $lines);
     foreach ($lines as $ref => $line) {
-      $parts = explode(' ', $line);
+      $parts = @explode(' ', $line);
       if (count($parts) < 2) {
         throw new Exception(
           pht(
@@ -282,7 +282,7 @@
 
     $hashlike = array();
     foreach ($unresolved as $key => $ref) {
-      if (preg_match('/^[a-f0-9]{40}\z/', $ref)) {
+      if (@preg_match('/^[a-f0-9]{40}\z/', $ref)) {
         $hashlike[$key] = $ref;
       }
     }
@@ -351,13 +351,13 @@
       try {
         list($stdout) = $future->resolvex();
       } catch (CommandException $ex) {
-        if (preg_match('/ambiguous identifier/', $ex->getStderr())) {
+        if (@preg_match('/ambiguous identifier/', $ex->getStderr())) {
           // This indicates that the ref ambiguously matched several things.
           // Eventually, it would be nice to return all of them, but it is
           // unclear how to best do that. For now, treat it as a miss instead.
           continue;
         }
-        if (preg_match('/unknown revision/', $ex->getStderr())) {
+        if (@preg_match('/unknown revision/', $ex->getStderr())) {
           // No matches for this ref.
           continue;
         }
diff --git a/src/applications/diffusion/query/pathid/DiffusionPathIDQuery.php b/src/applications/diffusion/query/pathid/DiffusionPathIDQuery.php
--- a/src/applications/diffusion/query/pathid/DiffusionPathIDQuery.php
+++ b/src/applications/diffusion/query/pathid/DiffusionPathIDQuery.php
@@ -84,7 +84,7 @@
   public static function expandPathToRoot($path) {
     $path = self::normalizePath($path);
     $parents = array($path);
-    $parts = explode('/', trim($path, '/'));
+    $parts = @explode('/', trim($path, '/'));
     while (count($parts) >= 1) {
       if (array_pop($parts)) {
         $parents[] = '/'.implode('/', $parts);
diff --git a/src/applications/diffusion/query/rawdiff/DiffusionGitRawDiffQuery.php b/src/applications/diffusion/query/rawdiff/DiffusionGitRawDiffQuery.php
--- a/src/applications/diffusion/query/rawdiff/DiffusionGitRawDiffQuery.php
+++ b/src/applications/diffusion/query/rawdiff/DiffusionGitRawDiffQuery.php
@@ -27,7 +27,7 @@
         '--format=%P',
         gitsprintf('%s', $commit));
 
-      if (strlen(trim($parents))) {
+      if (@strlen(trim($parents))) {
         $against = $commit.'^';
       } else {
         $against = ArcanistGitAPI::GIT_MAGIC_ROOT_COMMIT;
@@ -35,7 +35,7 @@
     }
 
     $path = $drequest->getPath();
-    if (!strlen($path)) {
+    if (!@strlen($path)) {
       $path = '.';
     }
 
diff --git a/src/applications/diffusion/remarkup/DiffusionSourceLinkRemarkupRule.php b/src/applications/diffusion/remarkup/DiffusionSourceLinkRemarkupRule.php
--- a/src/applications/diffusion/remarkup/DiffusionSourceLinkRemarkupRule.php
+++ b/src/applications/diffusion/remarkup/DiffusionSourceLinkRemarkupRule.php
@@ -78,7 +78,7 @@
         '(?P<options>.*)'.
         '\z)';
       $matches = null;
-      if (!preg_match($pattern, $input, $matches)) {
+      if (!@preg_match($pattern, $input, $matches)) {
         $hint_text = pht(
           'Missing path, expected "{src path ...}" in: %s',
           $raw);
@@ -89,12 +89,12 @@
       }
 
       $path = idx($matches, 'rawpath');
-      if (!strlen($path)) {
+      if (!@strlen($path)) {
         $path = idx($matches, 'quotedpath');
         $path = stripcslashes($path);
       }
 
-      $parts = explode(':', $path, 2);
+      $parts = @explode(':', $path, 2);
       if (count($parts) == 2) {
         $repository = nonempty($parts[0], null);
         $path = $parts[1];
diff --git a/src/applications/diffusion/request/DiffusionGitRequest.php b/src/applications/diffusion/request/DiffusionGitRequest.php
--- a/src/applications/diffusion/request/DiffusionGitRequest.php
+++ b/src/applications/diffusion/request/DiffusionGitRequest.php
@@ -3,7 +3,7 @@
 final class DiffusionGitRequest extends DiffusionRequest {
 
   protected function isStableCommit($symbol) {
-    return preg_match('/^[a-f0-9]{40}\z/', $symbol);
+    return @preg_match('/^[a-f0-9]{40}\z/', $symbol);
   }
 
   public function getBranch() {
diff --git a/src/applications/diffusion/request/DiffusionMercurialRequest.php b/src/applications/diffusion/request/DiffusionMercurialRequest.php
--- a/src/applications/diffusion/request/DiffusionMercurialRequest.php
+++ b/src/applications/diffusion/request/DiffusionMercurialRequest.php
@@ -3,7 +3,7 @@
 final class DiffusionMercurialRequest extends DiffusionRequest {
 
   protected function isStableCommit($symbol) {
-    return preg_match('/^[a-f0-9]{40}\z/', $symbol);
+    return @preg_match('/^[a-f0-9]{40}\z/', $symbol);
   }
 
   public function getBranch() {
diff --git a/src/applications/diffusion/request/DiffusionRequest.php b/src/applications/diffusion/request/DiffusionRequest.php
--- a/src/applications/diffusion/request/DiffusionRequest.php
+++ b/src/applications/diffusion/request/DiffusionRequest.php
@@ -207,7 +207,7 @@
    */
   private function initializeFromDictionary(array $data) {
     $blob = idx($data, 'blob');
-    if (strlen($blob)) {
+    if (@strlen($blob)) {
       $blob = self::parseRequestBlob($blob, $this->supportsBranches());
       $data = $blob + $data;
     }
@@ -483,9 +483,9 @@
     if ($supports_branches) {
       // Consume the front part of the URI, up to the first "/". This is the
       // path-component encoded branch name.
-      if (preg_match('@^([^/]+)/@', $blob, $matches)) {
+      if (@preg_match('@^([^/]+)/@', $blob, $matches)) {
         $result['branch'] = phutil_unescape_uri_path_component($matches[1]);
-        $blob = substr($blob, strlen($matches[1]) + 1);
+        $blob = @substr($blob, @strlen($matches[1]) + 1);
       }
     }
 
@@ -493,9 +493,9 @@
     // lookbehind to prevent matching '$$'. We double the '$' symbol when
     // encoding so that files with names like "money/$100" will survive.
     $pattern = '@(?:(?:^|[^$])(?:[$][$])*)[$]([\d,-]+)$@';
-    if (preg_match($pattern, $blob, $matches)) {
+    if (@preg_match($pattern, $blob, $matches)) {
       $result['line'] = $matches[1];
-      $blob = substr($blob, 0, -(strlen($matches[1]) + 1));
+      $blob = @substr($blob, 0, -(@strlen($matches[1]) + 1));
     }
 
     // We've consumed the line number if it exists, so unescape "$" in the
@@ -505,20 +505,20 @@
     // Consume the commit name, stopping on ';;'. We allow any character to
     // appear in commits names, as they can sometimes be symbolic names (like
     // tag names or refs).
-    if (preg_match('@(?:(?:^|[^;])(?:;;)*);([^;].*)$@', $blob, $matches)) {
+    if (@preg_match('@(?:(?:^|[^;])(?:;;)*);([^;].*)$@', $blob, $matches)) {
       $result['commit'] = $matches[1];
-      $blob = substr($blob, 0, -(strlen($matches[1]) + 1));
+      $blob = @substr($blob, 0, -(@strlen($matches[1]) + 1));
     }
 
     // We've consumed the commit if it exists, so unescape ";" in the rest
     // of the string.
     $blob = str_replace(';;', ';', $blob);
 
-    if (strlen($blob)) {
+    if (@strlen($blob)) {
       $result['path'] = $blob;
     }
 
-    $parts = explode('/', $result['path']);
+    $parts = @explode('/', $result['path']);
     foreach ($parts as $part) {
       // Prevent any hyjinx since we're ultimately shipping this to the
       // filesystem under a lot of workflows.
diff --git a/src/applications/diffusion/request/DiffusionSvnRequest.php b/src/applications/diffusion/request/DiffusionSvnRequest.php
--- a/src/applications/diffusion/request/DiffusionSvnRequest.php
+++ b/src/applications/diffusion/request/DiffusionSvnRequest.php
@@ -3,7 +3,7 @@
 final class DiffusionSvnRequest extends DiffusionRequest {
 
   protected function isStableCommit($symbol) {
-    return preg_match('/^[1-9]\d*\z/', $symbol);
+    return @preg_match('/^[1-9]\d*\z/', $symbol);
   }
 
   protected function didInitialize() {
diff --git a/src/applications/diffusion/response/DiffusionGitResponse.php b/src/applications/diffusion/response/DiffusionGitResponse.php
--- a/src/applications/diffusion/response/DiffusionGitResponse.php
+++ b/src/applications/diffusion/response/DiffusionGitResponse.php
@@ -7,18 +7,18 @@
   private $response;
 
   public function setGitData($data) {
-    list($headers, $body) = explode("\r\n\r\n", $data, 2);
+    list($headers, $body) = @explode("\r\n\r\n", $data, 2);
     $this->response = $body;
-    $headers = explode("\r\n", $headers);
+    $headers = @explode("\r\n", $headers);
 
     $matches = null;
     $this->httpCode = 200;
     $this->headers = array();
     foreach ($headers as $header) {
-      if (preg_match('/^Status:\s*(\d+)/i', $header, $matches)) {
+      if (@preg_match('/^Status:\s*(\d+)/i', $header, $matches)) {
         $this->httpCode = (int)$matches[1];
       } else {
-        $this->headers[] = explode(': ', $header, 2);
+        $this->headers[] = @explode(': ', $header, 2);
       }
     }
 
diff --git a/src/applications/diffusion/ssh/DiffusionGitSSHWorkflow.php b/src/applications/diffusion/ssh/DiffusionGitSSHWorkflow.php
--- a/src/applications/diffusion/ssh/DiffusionGitSSHWorkflow.php
+++ b/src/applications/diffusion/ssh/DiffusionGitSSHWorkflow.php
@@ -102,7 +102,7 @@
     PhabricatorSSHPassthruCommand $command,
     $message) {
 
-    $this->ioBytesWritten += strlen($message);
+    $this->ioBytesWritten += @strlen($message);
 
     $log = $this->getProtocolLog();
     if ($log) {
@@ -135,7 +135,7 @@
     // layer. This means the underlying command might emit bytes, but if they
     // are buffered by the protocol layer they won't count as read bytes yet.
 
-    $this->ioBytesRead += strlen($message);
+    $this->ioBytesRead += @strlen($message);
 
     return $message;
   }
diff --git a/src/applications/diffusion/ssh/DiffusionMercurialWireClientSSHProtocolChannel.php b/src/applications/diffusion/ssh/DiffusionMercurialWireClientSSHProtocolChannel.php
--- a/src/applications/diffusion/ssh/DiffusionMercurialWireClientSSHProtocolChannel.php
+++ b/src/applications/diffusion/ssh/DiffusionMercurialWireClientSSHProtocolChannel.php
@@ -32,28 +32,28 @@
   }
 
   private function readProtocolLine() {
-    $pos = strpos($this->buffer, "\n");
+    $pos = @strpos($this->buffer, "\n");
 
     if ($pos === false) {
       return null;
     }
 
-    $line = substr($this->buffer, 0, $pos);
+    $line = @substr($this->buffer, 0, $pos);
 
     $this->raw .= $line."\n";
-    $this->buffer = substr($this->buffer, $pos + 1);
+    $this->buffer = @substr($this->buffer, $pos + 1);
 
     return $line;
   }
 
   private function readProtocolBytes() {
-    if (strlen($this->buffer) < $this->expectBytes) {
+    if (@strlen($this->buffer) < $this->expectBytes) {
       return null;
     }
 
-    $bytes = substr($this->buffer, 0, $this->expectBytes);
+    $bytes = @substr($this->buffer, 0, $this->expectBytes);
     $this->raw .= $bytes;
-    $this->buffer = substr($this->buffer, $this->expectBytes);
+    $this->buffer = @substr($this->buffer, $this->expectBytes);
 
     return $bytes;
   }
@@ -71,7 +71,7 @@
   private function newDataMessage($bytes) {
     $message = array(
       'command' => '<raw-data>',
-      'raw' => strlen($bytes)."\n".$bytes,
+      'raw' => @strlen($bytes)."\n".$bytes,
     );
     return $message;
   }
@@ -125,7 +125,7 @@
             break;
           }
 
-          list($arg, $size) = explode(' ', $line, 2);
+          list($arg, $size) = @explode(' ', $line, 2);
           $size = (int)$size;
 
           if ($arg != '*') {
@@ -168,7 +168,7 @@
             break;
           }
 
-          list($arg, $size) = explode(' ', $line, 2);
+          list($arg, $size) = @explode(' ', $line, 2);
           $size = (int)$size;
 
           $this->expectBytes = $size;
@@ -207,13 +207,13 @@
         // If we don't have any more bytes on the buffer yet, just bail:
         // otherwise, we'll emit a pointless and possibly harmful 0-byte data
         // frame. See T13036 for discussion.
-        if (!strlen($this->buffer)) {
+        if (!@strlen($this->buffer)) {
           break;
         }
 
-        $bytes = substr($this->buffer, 0, $this->expectBytes);
-        $this->buffer = substr($this->buffer, strlen($bytes));
-        $this->expectBytes -= strlen($bytes);
+        $bytes = @substr($this->buffer, 0, $this->expectBytes);
+        $this->buffer = @substr($this->buffer, @strlen($bytes));
+        $this->expectBytes -= @strlen($bytes);
 
         // NOTE: We emit a data frame as soon as we read some data. This can
         // cause us to repackage frames: for example, if we receive one large
diff --git a/src/applications/diffusion/ssh/DiffusionSubversionServeSSHWorkflow.php b/src/applications/diffusion/ssh/DiffusionSubversionServeSSHWorkflow.php
--- a/src/applications/diffusion/ssh/DiffusionSubversionServeSSHWorkflow.php
+++ b/src/applications/diffusion/ssh/DiffusionSubversionServeSSHWorkflow.php
@@ -96,7 +96,7 @@
       $in_message = $io_channel->read();
       if ($in_message !== null) {
         $this->peekBuffer .= $in_message;
-        if (strlen($this->peekBuffer) > (1024 * 1024)) {
+        if (@strlen($this->peekBuffer) > (1024 * 1024)) {
           throw new Exception(
             pht(
               'Client transmitted more than 1MB of data without transmitting '.
@@ -375,7 +375,7 @@
 
     // Subversion presumably deals with this, but make sure there's nothing
     // sketchy going on with the URI.
-    if (preg_match('(/\\.\\./)', $path)) {
+    if (@preg_match('(/\\.\\./)', $path)) {
       throw new Exception(
         pht(
           'String "%s" is invalid in path specification "%s".',
@@ -403,7 +403,7 @@
     // Replace "/diffusion/X" in the request with the repository local path,
     // so "/diffusion/X/master/" becomes "/path/to/repository/X/master/".
     $local_path = rtrim($repository->getLocalPath(), '/');
-    $path = $local_path.substr($path, strlen($external_base));
+    $path = $local_path.@substr($path, @strlen($external_base));
 
     // NOTE: We are intentionally NOT removing username information from the
     // URI. Subversion retains it over the course of the request and considers
@@ -437,8 +437,8 @@
     $internal = $this->internalBaseURI;
     $external = $this->externalBaseURI;
 
-    if (strncmp($uri, $internal, strlen($internal)) === 0) {
-      $uri = $external.substr($uri, strlen($internal));
+    if (strncmp($uri, $internal, @strlen($internal)) === 0) {
+      $uri = $external.@substr($uri, @strlen($internal));
     }
 
     return $uri;
diff --git a/src/applications/diffusion/ssh/__tests__/DiffusionMercurialWireSSHTestCase.php b/src/applications/diffusion/ssh/__tests__/DiffusionMercurialWireSSHTestCase.php
--- a/src/applications/diffusion/ssh/__tests__/DiffusionMercurialWireSSHTestCase.php
+++ b/src/applications/diffusion/ssh/__tests__/DiffusionMercurialWireSSHTestCase.php
@@ -7,7 +7,7 @@
     $dir = Filesystem::listDirectory($data, $include_hidden = false);
     foreach ($dir as $file) {
       $raw = Filesystem::readFile($data.$file);
-      $raw = explode("\n~~~~~~~~~~\n", $raw, 2);
+      $raw = @explode("\n~~~~~~~~~~\n", $raw, 2);
       $this->assertEqual(2, count($raw));
       $expect = phutil_json_decode($raw[1]);
       $this->assertTrue(is_array($expect), $file);
diff --git a/src/applications/diffusion/typeahead/DiffusionRepositoryDatasource.php b/src/applications/diffusion/typeahead/DiffusionRepositoryDatasource.php
--- a/src/applications/diffusion/typeahead/DiffusionRepositoryDatasource.php
+++ b/src/applications/diffusion/typeahead/DiffusionRepositoryDatasource.php
@@ -41,7 +41,7 @@
       $parts[] = $name;
 
       $slug = $repository->getRepositorySlug();
-      if (strlen($slug)) {
+      if (@strlen($slug)) {
         $parts[] = $slug;
       }
 
diff --git a/src/applications/diffusion/typeahead/DiffusionSymbolDatasource.php b/src/applications/diffusion/typeahead/DiffusionSymbolDatasource.php
--- a/src/applications/diffusion/typeahead/DiffusionSymbolDatasource.php
+++ b/src/applications/diffusion/typeahead/DiffusionSymbolDatasource.php
@@ -27,7 +27,7 @@
 
     $results = array();
 
-    if (strlen($raw_query)) {
+    if (@strlen($raw_query)) {
       $symbols = id(new DiffusionSymbolQuery())
         ->setViewer($viewer)
         ->setNamePrefix($raw_query)
diff --git a/src/applications/diffusion/view/DiffusionPatternSearchView.php b/src/applications/diffusion/view/DiffusionPatternSearchView.php
--- a/src/applications/diffusion/view/DiffusionPatternSearchView.php
+++ b/src/applications/diffusion/view/DiffusionPatternSearchView.php
@@ -42,12 +42,12 @@
       } else {
         $output = array();
         $cursor = 0;
-        $length = strlen($string);
+        $length = @strlen($string);
         foreach ($matches[0] as $match) {
           $offset = $match[1];
           if ($cursor != $offset) {
             $output[] = array(
-              'text' => substr($string, $cursor, ($offset - $cursor)),
+              'text' => @substr($string, $cursor, ($offset - $cursor)),
               'highlight' => false,
             );
           }
@@ -55,11 +55,11 @@
             'text' => $match[0],
             'highlight' => true,
           );
-          $cursor = $offset + strlen($match[0]);
+          $cursor = $offset + @strlen($match[0]);
         }
         if ($cursor != $length) {
           $output[] = array(
-            'text' => substr($string, $cursor),
+            'text' => @substr($string, $cursor),
             'highlight' => false,
           );
         }
diff --git a/src/applications/diffusion/view/DiffusionReadmeView.php b/src/applications/diffusion/view/DiffusionReadmeView.php
--- a/src/applications/diffusion/view/DiffusionReadmeView.php
+++ b/src/applications/diffusion/view/DiffusionReadmeView.php
@@ -35,7 +35,7 @@
       return 'remarkup';
     }
 
-    $ext = last(explode('.', $path));
+    $ext = last(@explode('.', $path));
     switch ($ext) {
       case 'remarkup':
       case 'md':
diff --git a/src/applications/diffusion/view/DiffusionSourceLinkView.php b/src/applications/diffusion/view/DiffusionSourceLinkView.php
--- a/src/applications/diffusion/view/DiffusionSourceLinkView.php
+++ b/src/applications/diffusion/view/DiffusionSourceLinkView.php
@@ -162,7 +162,7 @@
     $icon = 'fa-file-text-o';
 
     $text = $this->getText();
-    if (!strlen($text)) {
+    if (!@strlen($text)) {
       $path = $this->getDisplayPath();
 
       $line = $this->getDisplayLine();
diff --git a/src/applications/diffusion/view/DiffusionView.php b/src/applications/diffusion/view/DiffusionView.php
--- a/src/applications/diffusion/view/DiffusionView.php
+++ b/src/applications/diffusion/view/DiffusionView.php
@@ -71,7 +71,7 @@
     $display_name = idx($details, 'name');
     unset($details['name']);
 
-    if (strlen($display_name)) {
+    if (@strlen($display_name)) {
       $display_name = phutil_tag(
         'span',
         array(
@@ -144,7 +144,7 @@
 
     $commit_name = $repository->formatCommitName($commit, $local = true);
 
-    if (strlen($summary)) {
+    if (@strlen($summary)) {
       $commit_name .= ': '.$summary;
     }
 
diff --git a/src/applications/diviner/atom/DivinerAtomRef.php b/src/applications/diviner/atom/DivinerAtomRef.php
--- a/src/applications/diviner/atom/DivinerAtomRef.php
+++ b/src/applications/diviner/atom/DivinerAtomRef.php
@@ -43,7 +43,7 @@
 
   public function setName($name) {
     $normal_name = self::normalizeString($name);
-    if (preg_match('/^@\d+\z/', $normal_name)) {
+    if (@preg_match('/^@\d+\z/', $normal_name)) {
       throw new Exception(
         pht(
           "Atom names must not be in the form '%s'. This pattern is ".
diff --git a/src/applications/diviner/atomizer/DivinerArticleAtomizer.php b/src/applications/diviner/atomizer/DivinerArticleAtomizer.php
--- a/src/applications/diviner/atomizer/DivinerArticleAtomizer.php
+++ b/src/applications/diviner/atomizer/DivinerArticleAtomizer.php
@@ -5,7 +5,7 @@
   protected function executeAtomize($file_name, $file_data) {
     $atom = $this->newAtom(DivinerAtom::TYPE_ARTICLE)
       ->setLine(1)
-      ->setLength(count(explode("\n", $file_data)))
+      ->setLength(count(@explode("\n", $file_data)))
       ->setLanguage('human');
 
     $block = "/**\n".str_replace("\n", "\n * ", $file_data)."\n */";
@@ -14,7 +14,7 @@
     $meta = $atom->getDocblockMeta();
 
     $title = idx($meta, 'title');
-    if (!strlen($title)) {
+    if (!@strlen($title)) {
       $title = pht('Untitled Article "%s"', basename($file_name));
       $atom->addWarning(pht('Article has no %s!', '@title'));
       $atom->setDocblockMetaValue('title', $title);
diff --git a/src/applications/diviner/atomizer/DivinerPHPAtomizer.php b/src/applications/diviner/atomizer/DivinerPHPAtomizer.php
--- a/src/applications/diviner/atomizer/DivinerPHPAtomizer.php
+++ b/src/applications/diviner/atomizer/DivinerPHPAtomizer.php
@@ -89,7 +89,7 @@
           $attributes = $attribute_list->selectDescendantsOfType('n_STRING');
           if ($attributes) {
             foreach ($attributes as $attribute) {
-              $attr = strtolower($attribute->getConcreteString());
+              $attr = @strtolower($attribute->getConcreteString());
               switch ($attr) {
                 case 'final':
                 case 'abstract':
@@ -209,7 +209,7 @@
         if ($prev && $prev->isComment()) {
           $value = $prev->getValue();
           $matches = null;
-          if (preg_match('/@(return|param|task|author)/', $value, $matches)) {
+          if (@preg_match('/@(return|param|task|author)/', $value, $matches)) {
             $atom->addWarning(
               pht(
                 'Atom "%s" is preceded by a comment containing `%s`, but '.
@@ -243,7 +243,7 @@
       // get rid of the `$num` part (which Diviner considers optional). If it
       // is present and different from the declared name, raise a warning.
       $matches = null;
-      if (preg_match('/^(\\$\S+)\s+/', $docs, $matches)) {
+      if (@preg_match('/^(\\$\S+)\s+/', $docs, $matches)) {
         if ($name !== null) {
           if ($matches[1] !== $name) {
             $atom->addWarning(
@@ -254,7 +254,7 @@
                 $matches[1]));
           }
         }
-        $docs = substr($docs, strlen($matches[0]));
+        $docs = @substr($docs, @strlen($matches[0]));
       }
 
       $dict['docs'] = $docs;
diff --git a/src/applications/diviner/cache/DivinerDiskCache.php b/src/applications/diviner/cache/DivinerDiskCache.php
--- a/src/applications/diviner/cache/DivinerDiskCache.php
+++ b/src/applications/diviner/cache/DivinerDiskCache.php
@@ -33,9 +33,9 @@
     return implode(
       '/',
       array(
-        substr($hash, 0, 2),
-        substr($hash, 2, 2),
-        substr($hash, 4, 8),
+        @substr($hash, 0, 2),
+        @substr($hash, 2, 2),
+        @substr($hash, 4, 8),
       ));
   }
 
diff --git a/src/applications/diviner/controller/DivinerAtomController.php b/src/applications/diviner/controller/DivinerAtomController.php
--- a/src/applications/diviner/controller/DivinerAtomController.php
+++ b/src/applications/diviner/controller/DivinerAtomController.php
@@ -165,7 +165,7 @@
 
               $item = $this->renderFullSignature($atom, true);
 
-              if (strlen($atom->getSummary())) {
+              if (@strlen($atom->getSummary())) {
                 $item = array(
                   $item,
                   " \xE2\x80\x94 ",
@@ -437,7 +437,7 @@
     $tasks = $symbol->getAtom()->getDocblockMetaValue('task');
 
     if (!is_array($tasks)) {
-      if (strlen($tasks)) {
+      if (@strlen($tasks)) {
         $tasks = array($tasks);
       } else {
         $tasks = array();
@@ -446,7 +446,7 @@
 
     if ($tasks) {
       foreach ($tasks as $task) {
-        list($name, $title) = explode(' ', $task, 2);
+        list($name, $title) = @explode(' ', $task, 2);
         $name = trim($name);
         $title = trim($title);
 
@@ -622,7 +622,7 @@
     $field = 'default';
     $content = $engine->getOutput($symbol, $field);
 
-    if (strlen(trim($symbol->getMarkupText($field)))) {
+    if (@strlen(trim($symbol->getMarkupText($field)))) {
       $content = phutil_tag(
         'div',
         array(
@@ -656,7 +656,7 @@
     foreach ($symbols as $key => $symbol) {
       $impl = $implementations[$key];
       if ($impl !== $parent) {
-        if (!strlen(trim($symbol->getMarkupText($field)))) {
+        if (!@strlen(trim($symbol->getMarkupText($field)))) {
           continue;
         }
       }
diff --git a/src/applications/diviner/controller/DivinerBookController.php b/src/applications/diviner/controller/DivinerBookController.php
--- a/src/applications/diviner/controller/DivinerBookController.php
+++ b/src/applications/diviner/controller/DivinerBookController.php
@@ -74,7 +74,7 @@
     $out = array();
     foreach ($groups as $group => $atoms) {
       $group_name = $book->getGroupName($group);
-      if (!strlen($group_name)) {
+      if (!@strlen($group_name)) {
         $group_name = pht('Free Radicals');
       }
       $section = id(new DivinerSectionView())
@@ -85,7 +85,7 @@
 
     $preface = $book->getPreface();
     $preface_view = null;
-    if (strlen($preface)) {
+    if (@strlen($preface)) {
       $preface_view = new PHUIRemarkupView($viewer, $preface);
     }
 
diff --git a/src/applications/diviner/controller/DivinerFindController.php b/src/applications/diviner/controller/DivinerFindController.php
--- a/src/applications/diviner/controller/DivinerFindController.php
+++ b/src/applications/diviner/controller/DivinerFindController.php
@@ -32,12 +32,12 @@
     }
 
     $context = $request->getStr('context');
-    if (strlen($context)) {
+    if (@strlen($context)) {
       $query->withContexts(array($context));
     }
 
     $type = $request->getStr('type');
-    if (strlen($type)) {
+    if (@strlen($type)) {
       $query->withTypes(array($type));
     }
 
diff --git a/src/applications/diviner/markup/DivinerSymbolRemarkupRule.php b/src/applications/diviner/markup/DivinerSymbolRemarkupRule.php
--- a/src/applications/diviner/markup/DivinerSymbolRemarkupRule.php
+++ b/src/applications/diviner/markup/DivinerSymbolRemarkupRule.php
@@ -49,16 +49,16 @@
 
     $ref = array();
 
-    if (strpos($type, '@') !== false) {
-      list($type, $book) = explode('@', $type, 2);
+    if (@strpos($type, '@') !== false) {
+      list($type, $book) = @explode('@', $type, 2);
       $ref['type'] = trim($type);
       $ref['book'] = trim($book);
     } else {
       $ref['type'] = $type;
     }
 
-    if (strpos($name, '@') !== false) {
-      list($name, $context) = explode('@', $name, 2);
+    if (@strpos($name, '@') !== false) {
+      list($name, $context) = @explode('@', $name, 2);
       $ref['name'] = trim($name);
       $ref['context'] = trim($context);
     } else {
diff --git a/src/applications/diviner/query/DivinerBookQuery.php b/src/applications/diviner/query/DivinerBookQuery.php
--- a/src/applications/diviner/query/DivinerBookQuery.php
+++ b/src/applications/diviner/query/DivinerBookQuery.php
@@ -133,7 +133,7 @@
         $this->phids);
     }
 
-    if (strlen($this->nameLike)) {
+    if (@strlen($this->nameLike)) {
       $where[] = qsprintf(
         $conn,
         'name LIKE %~',
@@ -147,7 +147,7 @@
         $this->names);
     }
 
-    if (strlen($this->namePrefix)) {
+    if (@strlen($this->namePrefix)) {
       $where[] = qsprintf(
         $conn,
         'name LIKE %>',
diff --git a/src/applications/diviner/renderer/DivinerDefaultRenderer.php b/src/applications/diviner/renderer/DivinerDefaultRenderer.php
--- a/src/applications/diviner/renderer/DivinerDefaultRenderer.php
+++ b/src/applications/diviner/renderer/DivinerDefaultRenderer.php
@@ -197,7 +197,7 @@
   }
 
   public function normalizeAtomRef(DivinerAtomRef $ref) {
-    if (!strlen($ref->getBook())) {
+    if (!@strlen($ref->getBook())) {
       $ref->setBook($this->getConfig('name'));
     }
 
diff --git a/src/applications/diviner/storage/DivinerLiveSymbol.php b/src/applications/diviner/storage/DivinerLiveSymbol.php
--- a/src/applications/diviner/storage/DivinerLiveSymbol.php
+++ b/src/applications/diviner/storage/DivinerLiveSymbol.php
@@ -172,7 +172,7 @@
   public function getTitle() {
     $title = parent::getTitle();
 
-    if (!strlen($title)) {
+    if (!@strlen($title)) {
       $title = $this->getName();
     }
 
@@ -182,7 +182,7 @@
   public function setTitle($value) {
     $this->writeField('title', $value);
 
-    if (strlen($value)) {
+    if (@strlen($value)) {
       $slug = DivinerAtomRef::normalizeTitleString($value);
       $hash = PhabricatorHash::digestForIndex($slug);
       $this->titleSlugHash = $hash;
diff --git a/src/applications/diviner/workflow/DivinerAtomizeWorkflow.php b/src/applications/diviner/workflow/DivinerAtomizeWorkflow.php
--- a/src/applications/diviner/workflow/DivinerAtomizeWorkflow.php
+++ b/src/applications/diviner/workflow/DivinerAtomizeWorkflow.php
@@ -93,7 +93,7 @@
 
       $context['group'] = null;
       foreach ($group_rules as $rule => $group) {
-        if (preg_match($rule, $file)) {
+        if (@preg_match($rule, $file)) {
           $context['group'] = $group;
           break;
         }
@@ -135,7 +135,7 @@
   }
 
   private function shouldAtomizeFile($file_name, $file_data) {
-    return strpos($file_data, '@'.'undivinable') === false;
+    return @strpos($file_data, '@'.'undivinable') === false;
   }
 
 }
diff --git a/src/applications/diviner/workflow/DivinerGenerateWorkflow.php b/src/applications/diviner/workflow/DivinerGenerateWorkflow.php
--- a/src/applications/diviner/workflow/DivinerGenerateWorkflow.php
+++ b/src/applications/diviner/workflow/DivinerGenerateWorkflow.php
@@ -194,7 +194,7 @@
 
     $identifier = $args->getArg('repository');
     $repository = null;
-    if (strlen($identifier)) {
+    if (@strlen($identifier)) {
       $repository = id(new PhabricatorRepositoryQuery())
         ->setViewer(PhabricatorUser::getOmnipotentUser())
         ->withIdentifiers(array($identifier))
@@ -264,13 +264,13 @@
 
     foreach ($files as $file) {
       foreach ($exclude as $pattern) {
-        if (preg_match($pattern, $file)) {
+        if (@preg_match($pattern, $file)) {
           continue 2;
         }
       }
 
       foreach ($rules as $rule => $atomizer) {
-        $ok = preg_match($rule, $file);
+        $ok = @preg_match($rule, $file);
         if ($ok === false) {
           throw new Exception(
             pht("Rule '%s' is not a valid regular expression.", $rule));
diff --git a/src/applications/diviner/workflow/DivinerWorkflow.php b/src/applications/diviner/workflow/DivinerWorkflow.php
--- a/src/applications/diviner/workflow/DivinerWorkflow.php
+++ b/src/applications/diviner/workflow/DivinerWorkflow.php
@@ -50,7 +50,7 @@
     }
     $book['root'] = Filesystem::resolvePath($book['root'], $full_path);
 
-    if (!preg_match('/^[a-z][a-z-]*\z/', $book['name'])) {
+    if (!@preg_match('/^[a-z][a-z-]*\z/', $book['name'])) {
       $name = $book['name'];
       throw new PhutilArgumentUsageException(
         pht(
diff --git a/src/applications/doorkeeper/bridge/DoorkeeperBridgeGitHub.php b/src/applications/doorkeeper/bridge/DoorkeeperBridgeGitHub.php
--- a/src/applications/doorkeeper/bridge/DoorkeeperBridgeGitHub.php
+++ b/src/applications/doorkeeper/bridge/DoorkeeperBridgeGitHub.php
@@ -31,7 +31,7 @@
 
   protected function parseGitHubIssueID($id) {
     $matches = null;
-    if (!preg_match('(^([^/]+)/([^/]+)#([1-9]\d*)\z)', $id, $matches)) {
+    if (!@preg_match('(^([^/]+)/([^/]+)#([1-9]\d*)\z)', $id, $matches)) {
       throw new Exception(
         pht(
           'GitHub Issue ID "%s" is not properly formatted. Expected an ID '.
diff --git a/src/applications/doorkeeper/bridge/DoorkeeperBridgeGitHubIssue.php b/src/applications/doorkeeper/bridge/DoorkeeperBridgeGitHubIssue.php
--- a/src/applications/doorkeeper/bridge/DoorkeeperBridgeGitHubIssue.php
+++ b/src/applications/doorkeeper/bridge/DoorkeeperBridgeGitHubIssue.php
@@ -19,7 +19,7 @@
 
   public function pullRefs(array $refs) {
     $token = $this->getGitHubAccessToken();
-    if (!strlen($token)) {
+    if (!@strlen($token)) {
       return null;
     }
 
diff --git a/src/applications/doorkeeper/bridge/DoorkeeperBridgeGitHubUser.php b/src/applications/doorkeeper/bridge/DoorkeeperBridgeGitHubUser.php
--- a/src/applications/doorkeeper/bridge/DoorkeeperBridgeGitHubUser.php
+++ b/src/applications/doorkeeper/bridge/DoorkeeperBridgeGitHubUser.php
@@ -19,7 +19,7 @@
 
   public function pullRefs(array $refs) {
     $token = $this->getGitHubAccessToken();
-    if (!strlen($token)) {
+    if (!@strlen($token)) {
       return null;
     }
 
diff --git a/src/applications/doorkeeper/bridge/DoorkeeperBridgeJIRA.php b/src/applications/doorkeeper/bridge/DoorkeeperBridgeJIRA.php
--- a/src/applications/doorkeeper/bridge/DoorkeeperBridgeJIRA.php
+++ b/src/applications/doorkeeper/bridge/DoorkeeperBridgeJIRA.php
@@ -147,7 +147,7 @@
       return null;
     }
 
-    $path = substr($path, 0, $pos);
+    $path = @substr($path, 0, $pos);
     $path = $path.'browse/'.$object_id;
     $uri->setPath($path);
 
diff --git a/src/applications/draft/storage/PhabricatorDraft.php b/src/applications/draft/storage/PhabricatorDraft.php
--- a/src/applications/draft/storage/PhabricatorDraft.php
+++ b/src/applications/draft/storage/PhabricatorDraft.php
@@ -50,7 +50,7 @@
   }
 
   public static function newFromUserAndKey(PhabricatorUser $user, $key) {
-    if ($user->getPHID() && strlen($key)) {
+    if ($user->getPHID() && @strlen($key)) {
       $draft = id(new PhabricatorDraft())->loadOneWhere(
         'authorPHID = %s AND draftKey = %s',
         $user->getPHID(),
diff --git a/src/applications/drydock/blueprint/DrydockWorkingCopyBlueprintImplementation.php b/src/applications/drydock/blueprint/DrydockWorkingCopyBlueprintImplementation.php
--- a/src/applications/drydock/blueprint/DrydockWorkingCopyBlueprintImplementation.php
+++ b/src/applications/drydock/blueprint/DrydockWorkingCopyBlueprintImplementation.php
@@ -223,7 +223,7 @@
 
       $root_key = 'workingcopy.root';
       $root = $resource->getAttribute($root_key);
-      if (strlen($root)) {
+      if (@strlen($root)) {
         $interface->execx('rm -rf -- %s', $root);
       }
     }
diff --git a/src/applications/drydock/management/DrydockManagementLeaseWorkflow.php b/src/applications/drydock/management/DrydockManagementLeaseWorkflow.php
--- a/src/applications/drydock/management/DrydockManagementLeaseWorkflow.php
+++ b/src/applications/drydock/management/DrydockManagementLeaseWorkflow.php
@@ -41,7 +41,7 @@
     }
 
     $until = $args->getArg('until');
-    if (strlen($until)) {
+    if (@strlen($until)) {
       $until = strtotime($until);
       if ($until <= 0) {
         throw new PhutilArgumentUsageException(
@@ -52,7 +52,7 @@
     }
 
     $attributes_file = $args->getArg('attributes');
-    if (strlen($attributes_file)) {
+    if (@strlen($attributes_file)) {
       if ($attributes_file == '-') {
         echo tsprintf(
           "%s\n",
diff --git a/src/applications/drydock/operation/DrydockLandRepositoryOperation.php b/src/applications/drydock/operation/DrydockLandRepositoryOperation.php
--- a/src/applications/drydock/operation/DrydockLandRepositoryOperation.php
+++ b/src/applications/drydock/operation/DrydockLandRepositoryOperation.php
@@ -96,7 +96,7 @@
     }
 
     $target = $operation->getRepositoryTarget();
-    list($type, $name) = explode(':', $target, 2);
+    list($type, $name) = @explode(':', $target, 2);
     switch ($type) {
       case 'branch':
         $push_dst = 'refs/heads/'.$name;
@@ -178,7 +178,7 @@
       }
     }
 
-    if (!strlen($committer_name)) {
+    if (!@strlen($committer_name)) {
       $committer_name = pht('autocommitter');
     }
 
diff --git a/src/applications/drydock/worker/DrydockRepositoryOperationUpdateWorker.php b/src/applications/drydock/worker/DrydockRepositoryOperationUpdateWorker.php
--- a/src/applications/drydock/worker/DrydockRepositoryOperationUpdateWorker.php
+++ b/src/applications/drydock/worker/DrydockRepositoryOperationUpdateWorker.php
@@ -157,7 +157,7 @@
     $repository = $operation->getRepository();
 
     $target = $operation->getRepositoryTarget();
-    list($type, $name) = explode(':', $target, 2);
+    list($type, $name) = @explode(':', $target, 2);
     switch ($type) {
       case 'branch':
         $spec = array(
diff --git a/src/applications/drydock/xaction/DrydockBlueprintNameTransaction.php b/src/applications/drydock/xaction/DrydockBlueprintNameTransaction.php
--- a/src/applications/drydock/xaction/DrydockBlueprintNameTransaction.php
+++ b/src/applications/drydock/xaction/DrydockBlueprintNameTransaction.php
@@ -46,7 +46,7 @@
     foreach ($xactions as $xaction) {
       $new_value = $xaction->getNewValue();
 
-      $new_length = strlen($new_value);
+      $new_length = @strlen($new_value);
       if ($new_length > $max_length) {
         $errors[] = $this->newInvalidError(
           pht('Blueprint names can be no longer than %s characters.',
diff --git a/src/applications/fact/chart/PhabricatorChartFunctionArgumentParser.php b/src/applications/fact/chart/PhabricatorChartFunctionArgumentParser.php
--- a/src/applications/fact/chart/PhabricatorChartFunctionArgumentParser.php
+++ b/src/applications/fact/chart/PhabricatorChartFunctionArgumentParser.php
@@ -29,7 +29,7 @@
 
   public function addArgument(PhabricatorChartFunctionArgument $spec) {
     $name = $spec->getName();
-    if (!strlen($name)) {
+    if (!@strlen($name)) {
       throw new Exception(
         pht(
           'Chart function "%s" emitted an argument specification with no '.
@@ -38,7 +38,7 @@
     }
 
     $type = $spec->getType();
-    if (!strlen($type)) {
+    if (!@strlen($type)) {
       throw new Exception(
         pht(
           'Chart function "%s" emitted an argument specification ("%s") with '.
diff --git a/src/applications/fact/extract/PhabricatorFactUpdateIterator.php b/src/applications/fact/extract/PhabricatorFactUpdateIterator.php
--- a/src/applications/fact/extract/PhabricatorFactUpdateIterator.php
+++ b/src/applications/fact/extract/PhabricatorFactUpdateIterator.php
@@ -40,7 +40,7 @@
   protected function loadPage() {
     if ($this->object->hasProperty('dateModified')) {
       if ($this->cursor) {
-        list($after_epoch, $after_id) = explode(':', $this->cursor);
+        list($after_epoch, $after_id) = @explode(':', $this->cursor);
       } else {
         $after_epoch = 0;
         $after_id = 0;
diff --git a/src/applications/fact/fact/PhabricatorFact.php b/src/applications/fact/fact/PhabricatorFact.php
--- a/src/applications/fact/fact/PhabricatorFact.php
+++ b/src/applications/fact/fact/PhabricatorFact.php
@@ -42,13 +42,13 @@
 
     $argv = array();
 
-    if (preg_match('/\.project\z/', $key)) {
+    if (@preg_match('/\.project\z/', $key)) {
       $argv[] = id(new PhabricatorChartFunctionArgument())
         ->setName('phid')
         ->setType('phid');
     }
 
-    if (preg_match('/\.owner\z/', $key)) {
+    if (@preg_match('/\.owner\z/', $key)) {
       $argv[] = id(new PhabricatorChartFunctionArgument())
         ->setName('phid')
         ->setType('phid');
diff --git a/src/applications/feed/conduit/FeedQueryConduitAPIMethod.php b/src/applications/feed/conduit/FeedQueryConduitAPIMethod.php
--- a/src/applications/feed/conduit/FeedQueryConduitAPIMethod.php
+++ b/src/applications/feed/conduit/FeedQueryConduitAPIMethod.php
@@ -80,12 +80,12 @@
       ->setPageSize($limit);
 
     $after = $request->getValue('after');
-    if (strlen($after)) {
+    if (@strlen($after)) {
       $pager->setAfterID($after);
     }
 
     $before = $request->getValue('before');
-    if (strlen($before)) {
+    if (@strlen($before)) {
       $pager->setBeforeID($before);
     }
 
diff --git a/src/applications/files/builtin/PhabricatorFilesComposeAvatarBuiltinFile.php b/src/applications/files/builtin/PhabricatorFilesComposeAvatarBuiltinFile.php
--- a/src/applications/files/builtin/PhabricatorFilesComposeAvatarBuiltinFile.php
+++ b/src/applications/files/builtin/PhabricatorFilesComposeAvatarBuiltinFile.php
@@ -15,7 +15,7 @@
     $username = $user->getUsername();
 
     $image_map = $this->getMap('image');
-    $initial = phutil_utf8_strtoupper(substr($username, 0, 1));
+    $initial = phutil_utf8_strtoupper(@substr($username, 0, 1));
     $pack = $this->pickMap('pack', $username);
     $icon = "alphanumeric/{$pack}/{$initial}.png";
     if (!isset($image_map[$icon])) {
diff --git a/src/applications/files/conduit/FileAllocateConduitAPIMethod.php b/src/applications/files/conduit/FileAllocateConduitAPIMethod.php
--- a/src/applications/files/conduit/FileAllocateConduitAPIMethod.php
+++ b/src/applications/files/conduit/FileAllocateConduitAPIMethod.php
@@ -65,7 +65,7 @@
         ->executeOne();
     }
 
-    if (strlen($name) && !$hash && !$file) {
+    if (@strlen($name) && !$hash && !$file) {
       if ($length > PhabricatorFileStorageEngine::getChunkThreshold()) {
         // If we don't have a hash, but this file is large enough to store in
         // chunks and thus may be resumable, try to find a partially uploaded
diff --git a/src/applications/files/conduit/FileUploadChunkConduitAPIMethod.php b/src/applications/files/conduit/FileUploadChunkConduitAPIMethod.php
--- a/src/applications/files/conduit/FileUploadChunkConduitAPIMethod.php
+++ b/src/applications/files/conduit/FileUploadChunkConduitAPIMethod.php
@@ -43,7 +43,7 @@
       default:
         throw new Exception(pht('Unsupported data encoding.'));
     }
-    $length = strlen($data);
+    $length = @strlen($data);
 
     $chunk = $this->loadFileChunkForUpload(
       $viewer,
diff --git a/src/applications/files/controller/PhabricatorFileDataController.php b/src/applications/files/controller/PhabricatorFileDataController.php
--- a/src/applications/files/controller/PhabricatorFileDataController.php
+++ b/src/applications/files/controller/PhabricatorFileDataController.php
@@ -29,7 +29,7 @@
     $request_kind = $request->getURIData('kind');
     $is_download = ($request_kind === 'download');
 
-    if (!strlen($alt) || $main_domain == $alt_domain) {
+    if (!@strlen($alt) || $main_domain == $alt_domain) {
       // No alternate domain.
       $should_redirect = false;
       $is_alternate_domain = false;
@@ -69,7 +69,7 @@
     // an initial request for bytes 0-1 of the audio file, and things go south
     // if we can't respond with a 206 Partial Content.
     $range = $request->getHTTPHeader('range');
-    if (strlen($range)) {
+    if (@strlen($range)) {
       list($begin, $end) = $response->parseHTTPRange($range);
     }
 
diff --git a/src/applications/files/controller/PhabricatorFileLightboxController.php b/src/applications/files/controller/PhabricatorFileLightboxController.php
--- a/src/applications/files/controller/PhabricatorFileLightboxController.php
+++ b/src/applications/files/controller/PhabricatorFileLightboxController.php
@@ -20,7 +20,7 @@
       return new Aphront404Response();
     }
 
-    if (strlen($comment)) {
+    if (@strlen($comment)) {
       $xactions = array();
       $xactions[] = id(new PhabricatorFileTransaction())
         ->setTransactionType(PhabricatorTransactions::TYPE_COMMENT)
diff --git a/src/applications/files/controller/PhabricatorFileViewController.php b/src/applications/files/controller/PhabricatorFileViewController.php
--- a/src/applications/files/controller/PhabricatorFileViewController.php
+++ b/src/applications/files/controller/PhabricatorFileViewController.php
@@ -311,12 +311,12 @@
       $file->getStorageHandle());
 
     $custom_alt = $file->getCustomAltText();
-    if (strlen($custom_alt)) {
+    if (@strlen($custom_alt)) {
       $finfo->addProperty(pht('Custom Alt Text'), $custom_alt);
     }
 
     $default_alt = $file->getDefaultAltText();
-    if (strlen($default_alt)) {
+    if (@strlen($default_alt)) {
       $finfo->addProperty(pht('Default Alt Text'), $default_alt);
     }
 
diff --git a/src/applications/files/diff/PhabricatorDocumentEngineBlocks.php b/src/applications/files/diff/PhabricatorDocumentEngineBlocks.php
--- a/src/applications/files/diff/PhabricatorDocumentEngineBlocks.php
+++ b/src/applications/files/diff/PhabricatorDocumentEngineBlocks.php
@@ -100,7 +100,7 @@
 
       if ($old_line) {
         $old_hash = rtrim($old_line['text'], "\n");
-        if (!strlen($old_hash)) {
+        if (!@strlen($old_hash)) {
           // This can happen when one of the sources has no blocks.
           $old_block = null;
         } else {
@@ -115,7 +115,7 @@
 
       if ($new_line) {
         $new_hash = rtrim($new_line['text'], "\n");
-        if (!strlen($new_hash)) {
+        if (!@strlen($new_hash)) {
           $new_block = null;
         } else {
           $new_block = array_shift($new_map[$new_hash]);
diff --git a/src/applications/files/document/PhabricatorDocumentRef.php b/src/applications/files/document/PhabricatorDocumentRef.php
--- a/src/applications/files/document/PhabricatorDocumentRef.php
+++ b/src/applications/files/document/PhabricatorDocumentRef.php
@@ -67,7 +67,7 @@
     }
 
     if ($this->data !== null) {
-      return strlen($this->data);
+      return @strlen($this->data);
     }
 
     if ($this->file) {
@@ -87,11 +87,11 @@
       $data = $this->data;
 
       if ($begin !== null && $end !== null) {
-        $data = substr($data, $begin, $end - $begin);
+        $data = @substr($data, $begin, $end - $begin);
       } else if ($begin !== null) {
-        $data = substr($data, $begin);
+        $data = @substr($data, $begin);
       } else if ($end !== null) {
-        $data = substr($data, 0, $end);
+        $data = @substr($data, 0, $end);
       }
 
       return $data;
@@ -112,7 +112,7 @@
 
   public function hasAnyMimeType(array $candidate_types) {
     $mime_full = $this->getMimeType();
-    $mime_parts = explode(';', $mime_full);
+    $mime_parts = @explode(';', $mime_full);
 
     $mime_type = head($mime_parts);
     $mime_type = $this->normalizeMimeType($mime_type);
@@ -134,7 +134,7 @@
 
   public function isProbablyText() {
     $snippet = $this->getSnippet();
-    return (strpos($snippet, "\0") === false);
+    return (@strpos($snippet, "\0") === false);
   }
 
   public function isProbablyJSON() {
@@ -147,7 +147,7 @@
     // If the file is longer than the snippet, we don't detect the content
     // as JSON. We could use some kind of heuristic here if we wanted, but
     // see PHI749 for a false positive.
-    if (strlen($snippet) < $this->getByteLength()) {
+    if (@strlen($snippet) < $this->getByteLength()) {
       return false;
     }
 
diff --git a/src/applications/files/document/PhabricatorHexdumpDocumentEngine.php b/src/applications/files/document/PhabricatorHexdumpDocumentEngine.php
--- a/src/applications/files/document/PhabricatorHexdumpDocumentEngine.php
+++ b/src/applications/files/document/PhabricatorHexdumpDocumentEngine.php
@@ -51,8 +51,8 @@
       $output[] = sprintf(
         '%08x  %- 23s  %- 23s  %- 16s',
         $offset,
-        $this->renderHex(substr($line, 0, 8)),
-        $this->renderHex(substr($line, 8)),
+        $this->renderHex(@substr($line, 0, 8)),
+        $this->renderHex(@substr($line, 8)),
         $this->renderBytes($line));
 
       $offset += 16;
@@ -83,7 +83,7 @@
   }
 
   private function renderHex($bytes) {
-    $length = strlen($bytes);
+    $length = @strlen($bytes);
 
     $output = array();
     for ($ii = 0; $ii < $length; $ii++) {
@@ -94,7 +94,7 @@
   }
 
   private function renderBytes($bytes) {
-    $length = strlen($bytes);
+    $length = @strlen($bytes);
 
     $output = array();
     for ($ii = 0; $ii < $length; $ii++) {
diff --git a/src/applications/files/document/PhabricatorJSONDocumentEngine.php b/src/applications/files/document/PhabricatorJSONDocumentEngine.php
--- a/src/applications/files/document/PhabricatorJSONDocumentEngine.php
+++ b/src/applications/files/document/PhabricatorJSONDocumentEngine.php
@@ -14,7 +14,7 @@
   }
 
   protected function getContentScore(PhabricatorDocumentRef $ref) {
-    if (preg_match('/\.json\z/', $ref->getName())) {
+    if (@preg_match('/\.json\z/', $ref->getName())) {
       return 2000;
     }
 
@@ -42,7 +42,7 @@
             'decoding it with "phutil_json_decode(...).'));
       }
 
-      if (preg_match('/^\s*\[/', $raw_data)) {
+      if (@preg_match('/^\s*\[/', $raw_data)) {
         $content = id(new PhutilJSON())->encodeAsList($data);
       } else {
         $content = id(new PhutilJSON())->encodeFormatted($data);
diff --git a/src/applications/files/document/PhabricatorJupyterDocumentEngine.php b/src/applications/files/document/PhabricatorJupyterDocumentEngine.php
--- a/src/applications/files/document/PhabricatorJupyterDocumentEngine.php
+++ b/src/applications/files/document/PhabricatorJupyterDocumentEngine.php
@@ -24,7 +24,7 @@
   protected function getContentScore(PhabricatorDocumentRef $ref) {
     $name = $ref->getName();
 
-    if (preg_match('/\\.ipynb\z/i', $name)) {
+    if (@preg_match('/\\.ipynb\z/i', $name)) {
       return 2000;
     }
 
@@ -323,7 +323,7 @@
     }
 
     $nbformat = idx($data, 'nbformat');
-    if (!strlen($nbformat)) {
+    if (!@strlen($nbformat)) {
       throw new Exception(
         pht(
           'This document is missing an "nbformat" field. Jupyter notebooks '.
@@ -691,7 +691,7 @@
     if ($force_language === null) {
       $head = head($lines);
       $matches = null;
-      if (preg_match('/^%%(.*)$/', $head, $matches)) {
+      if (@preg_match('/^%%(.*)$/', $head, $matches)) {
         $restore = array_shift($lines);
         $lang = $matches[1];
       } else {
diff --git a/src/applications/files/document/PhabricatorRemarkupDocumentEngine.php b/src/applications/files/document/PhabricatorRemarkupDocumentEngine.php
--- a/src/applications/files/document/PhabricatorRemarkupDocumentEngine.php
+++ b/src/applications/files/document/PhabricatorRemarkupDocumentEngine.php
@@ -15,7 +15,7 @@
 
   protected function getContentScore(PhabricatorDocumentRef $ref) {
     $name = $ref->getName();
-    if (preg_match('/\\.remarkup\z/i', $name)) {
+    if (@preg_match('/\\.remarkup\z/i', $name)) {
       return 2000;
     }
 
diff --git a/src/applications/files/document/PhabricatorSourceDocumentEngine.php b/src/applications/files/document/PhabricatorSourceDocumentEngine.php
--- a/src/applications/files/document/PhabricatorSourceDocumentEngine.php
+++ b/src/applications/files/document/PhabricatorSourceDocumentEngine.php
@@ -37,7 +37,7 @@
         $content);
     } else {
       $highlight_limit = DifferentialChangesetParser::HIGHLIGHT_BYTE_LIMIT;
-      if (strlen($content) > $highlight_limit) {
+      if (@strlen($content) > $highlight_limit) {
         $messages[] = $this->newMessage(
           pht(
             'This file is larger than %s, so syntax highlighting was skipped.',
diff --git a/src/applications/files/document/render/PhabricatorDocumentRenderingEngine.php b/src/applications/files/document/render/PhabricatorDocumentRenderingEngine.php
--- a/src/applications/files/document/render/PhabricatorDocumentRenderingEngine.php
+++ b/src/applications/files/document/render/PhabricatorDocumentRenderingEngine.php
@@ -60,12 +60,12 @@
     }
 
     $encode_setting = $request->getStr('encode');
-    if (strlen($encode_setting)) {
+    if (@strlen($encode_setting)) {
       $engine->setEncodingConfiguration($encode_setting);
     }
 
     $highlight_setting = $request->getStr('highlight');
-    if (strlen($highlight_setting)) {
+    if (@strlen($highlight_setting)) {
       $engine->setHighlightingConfiguration($highlight_setting);
     }
 
@@ -208,12 +208,12 @@
     $this->activeEngine = $engine;
 
     $encode_setting = $request->getStr('encode');
-    if (strlen($encode_setting)) {
+    if (@strlen($encode_setting)) {
       $engine->setEncodingConfiguration($encode_setting);
     }
 
     $highlight_setting = $request->getStr('highlight');
-    if (strlen($highlight_setting)) {
+    if (@strlen($highlight_setting)) {
       $engine->setHighlightingConfiguration($highlight_setting);
     }
 
diff --git a/src/applications/files/engine/PhabricatorChunkedFileStorageEngine.php b/src/applications/files/engine/PhabricatorChunkedFileStorageEngine.php
--- a/src/applications/files/engine/PhabricatorChunkedFileStorageEngine.php
+++ b/src/applications/files/engine/PhabricatorChunkedFileStorageEngine.php
@@ -105,7 +105,7 @@
     $rehash = PhabricatorHash::weakDigest($input);
 
     // Add a suffix to identify this as a chunk hash.
-    $rehash = substr($rehash, 0, -2).'-C';
+    $rehash = @substr($rehash, 0, -2).'-C';
 
     return $rehash;
   }
diff --git a/src/applications/files/engine/PhabricatorFileChunkIterator.php b/src/applications/files/engine/PhabricatorFileChunkIterator.php
--- a/src/applications/files/engine/PhabricatorFileChunkIterator.php
+++ b/src/applications/files/engine/PhabricatorFileChunkIterator.php
@@ -40,13 +40,13 @@
 
     if ($this->end !== null) {
       if ($chunk->getByteEnd() > $this->end) {
-        $data = substr($data, 0, ($this->end - $chunk->getByteStart()));
+        $data = @substr($data, 0, ($this->end - $chunk->getByteStart()));
       }
     }
 
     if ($this->begin !== null) {
       if ($chunk->getByteStart() < $this->begin) {
-        $data = substr($data, ($this->begin - $chunk->getByteStart()));
+        $data = @substr($data, ($this->begin - $chunk->getByteStart()));
       }
     }
 
diff --git a/src/applications/files/engine/PhabricatorFileStorageEngine.php b/src/applications/files/engine/PhabricatorFileStorageEngine.php
--- a/src/applications/files/engine/PhabricatorFileStorageEngine.php
+++ b/src/applications/files/engine/PhabricatorFileStorageEngine.php
@@ -355,11 +355,11 @@
     }
 
     if ($begin !== null && $end !== null) {
-      $data = substr($data, $begin, ($end - $begin));
+      $data = @substr($data, $begin, ($end - $begin));
     } else if ($begin !== null) {
-      $data = substr($data, $begin);
+      $data = @substr($data, $begin);
     } else if ($end !== null) {
-      $data = substr($data, 0, $end);
+      $data = @substr($data, 0, $end);
     }
 
     return array($data);
diff --git a/src/applications/files/engine/PhabricatorLocalDiskFileStorageEngine.php b/src/applications/files/engine/PhabricatorLocalDiskFileStorageEngine.php
--- a/src/applications/files/engine/PhabricatorLocalDiskFileStorageEngine.php
+++ b/src/applications/files/engine/PhabricatorLocalDiskFileStorageEngine.php
@@ -26,7 +26,7 @@
 
   public function canWriteFiles() {
     $path = PhabricatorEnv::getEnvConfig('storage.local-disk.path');
-    return (bool)strlen($path);
+    return (bool)@strlen($path);
   }
 
 
@@ -123,7 +123,7 @@
     // Make sure there's no funny business going on here. Users normally have
     // no ability to affect the content of handles, but double-check that
     // we're only accessing local storage just in case.
-    if (!preg_match('@^[a-f0-9]{2}/[a-f0-9]{2}/[a-f0-9]{28}\z@', $handle)) {
+    if (!@preg_match('@^[a-f0-9]{2}/[a-f0-9]{2}/[a-f0-9]{28}\z@', $handle)) {
       throw new Exception(
         pht(
           "Local disk filesystem handle '%s' is malformed!",
diff --git a/src/applications/files/engine/PhabricatorS3FileStorageEngine.php b/src/applications/files/engine/PhabricatorS3FileStorageEngine.php
--- a/src/applications/files/engine/PhabricatorS3FileStorageEngine.php
+++ b/src/applications/files/engine/PhabricatorS3FileStorageEngine.php
@@ -31,11 +31,11 @@
     $endpoint = PhabricatorEnv::getEnvConfig('amazon-s3.endpoint');
     $region = PhabricatorEnv::getEnvConfig('amazon-s3.region');
 
-    return (strlen($bucket) &&
-      strlen($access_key) &&
-      strlen($secret_key) &&
-      strlen($endpoint) &&
-      strlen($region));
+    return (@strlen($bucket) &&
+      @strlen($access_key) &&
+      @strlen($secret_key) &&
+      @strlen($endpoint) &&
+      @strlen($region));
   }
 
 
@@ -57,13 +57,13 @@
     $parts[] = 'phabricator';
 
     $instance_name = PhabricatorEnv::getEnvConfig('cluster.instance');
-    if (strlen($instance_name)) {
+    if (@strlen($instance_name)) {
       $parts[] = $instance_name;
     }
 
-    $parts[] = substr($seed, 0, 2);
-    $parts[] = substr($seed, 2, 2);
-    $parts[] = substr($seed, 4);
+    $parts[] = @substr($seed, 0, 2);
+    $parts[] = @substr($seed, 2, 2);
+    $parts[] = @substr($seed, 4);
 
     $name = implode('/', $parts);
 
diff --git a/src/applications/files/keyring/PhabricatorKeyringConfigOptionType.php b/src/applications/files/keyring/PhabricatorKeyringConfigOptionType.php
--- a/src/applications/files/keyring/PhabricatorKeyringConfigOptionType.php
+++ b/src/applications/files/keyring/PhabricatorKeyringConfigOptionType.php
@@ -80,13 +80,13 @@
                 $name));
           }
 
-          if (strlen($material) != 32) {
+          if (@strlen($material) != 32) {
             throw new Exception(
               pht(
                 'Keyring specifies an invalid key ("%s"): key material '.
                 'should be 32 bytes (256 bits) but has length %s.',
                 $name,
-                new PhutilNumber(strlen($material))));
+                new PhutilNumber(@strlen($material))));
           }
           break;
         default:
diff --git a/src/applications/files/mail/FileMailReceiver.php b/src/applications/files/mail/FileMailReceiver.php
--- a/src/applications/files/mail/FileMailReceiver.php
+++ b/src/applications/files/mail/FileMailReceiver.php
@@ -12,7 +12,7 @@
   }
 
   protected function loadObject($pattern, PhabricatorUser $viewer) {
-    $id = (int)substr($pattern, 1);
+    $id = (int)@substr($pattern, 1);
 
     return id(new PhabricatorFileQuery())
       ->setViewer($viewer)
diff --git a/src/applications/files/management/PhabricatorFilesManagementEncodeWorkflow.php b/src/applications/files/management/PhabricatorFilesManagementEncodeWorkflow.php
--- a/src/applications/files/management/PhabricatorFilesManagementEncodeWorkflow.php
+++ b/src/applications/files/management/PhabricatorFilesManagementEncodeWorkflow.php
@@ -42,7 +42,7 @@
     $format_list = implode(', ', $format_list);
 
     $format_key = $args->getArg('as');
-    if (!strlen($format_key)) {
+    if (!@strlen($format_key)) {
       throw new PhutilArgumentUsageException(
         pht(
           'Use --as <format> to select a target encoding format. Available '.
@@ -60,7 +60,7 @@
     }
 
     $key_name = $args->getArg('key');
-    if (strlen($key_name)) {
+    if (@strlen($key_name)) {
       $format->selectMasterKey($key_name);
     }
 
diff --git a/src/applications/files/management/PhabricatorFilesManagementGenerateKeyWorkflow.php b/src/applications/files/management/PhabricatorFilesManagementGenerateKeyWorkflow.php
--- a/src/applications/files/management/PhabricatorFilesManagementGenerateKeyWorkflow.php
+++ b/src/applications/files/management/PhabricatorFilesManagementGenerateKeyWorkflow.php
@@ -20,7 +20,7 @@
 
   public function execute(PhutilArgumentParser $args) {
     $type = $args->getArg('type');
-    if (!strlen($type)) {
+    if (!@strlen($type)) {
       throw new PhutilArgumentUsageException(
         pht(
           'Specify the type of key to generate with --type.'));
diff --git a/src/applications/files/management/PhabricatorFilesManagementMigrateWorkflow.php b/src/applications/files/management/PhabricatorFilesManagementMigrateWorkflow.php
--- a/src/applications/files/management/PhabricatorFilesManagementMigrateWorkflow.php
+++ b/src/applications/files/management/PhabricatorFilesManagementMigrateWorkflow.php
@@ -62,7 +62,7 @@
     // it as though it is configured to use the specified location.
 
     $local_disk_source = $args->getArg('local-disk-source');
-    if (strlen($local_disk_source)) {
+    if (@strlen($local_disk_source)) {
       $path = Filesystem::resolvePath($local_disk_source);
       try {
         Filesystem::assertIsDirectory($path);
diff --git a/src/applications/files/markup/PhabricatorEmbedFileRemarkupRule.php b/src/applications/files/markup/PhabricatorEmbedFileRemarkupRule.php
--- a/src/applications/files/markup/PhabricatorEmbedFileRemarkupRule.php
+++ b/src/applications/files/markup/PhabricatorEmbedFileRemarkupRule.php
@@ -166,7 +166,7 @@
       $alt = $options['alt'];
     }
 
-    if (!strlen($alt)) {
+    if (!@strlen($alt)) {
       $alt = $file->getAltText();
     }
 
@@ -317,7 +317,7 @@
   private function parseDimension($string) {
     $string = trim($string);
 
-    if (preg_match('/^(?:\d*\\.)?\d+%?$/', $string)) {
+    if (@preg_match('/^(?:\d*\\.)?\d+%?$/', $string)) {
       return $string;
     }
 
diff --git a/src/applications/files/markup/PhabricatorImageRemarkupRule.php b/src/applications/files/markup/PhabricatorImageRemarkupRule.php
--- a/src/applications/files/markup/PhabricatorImageRemarkupRule.php
+++ b/src/applications/files/markup/PhabricatorImageRemarkupRule.php
@@ -49,7 +49,7 @@
 
     $args += $defaults;
 
-    if (!strlen($args['uri'])) {
+    if (!@strlen($args['uri'])) {
       return $matches[0];
     }
 
@@ -59,7 +59,7 @@
     try {
       $uri = new PhutilURI($args['uri']);
 
-      if (!strlen($uri->getProtocol())) {
+      if (!@strlen($uri->getProtocol())) {
         return $matches[0];
       }
 
@@ -165,7 +165,7 @@
   private function isURI($uri_string) {
     // Very simple check to make sure it starts with either http or https.
     // If it does, we'll try to treat it like a valid URI
-    return preg_match('~^https?\:\/\/.*\z~i', $uri_string);
+    return @preg_match('~^https?\:\/\/.*\z~i', $uri_string);
   }
 
 }
diff --git a/src/applications/files/phid/PhabricatorFileFilePHIDType.php b/src/applications/files/phid/PhabricatorFileFilePHIDType.php
--- a/src/applications/files/phid/PhabricatorFileFilePHIDType.php
+++ b/src/applications/files/phid/PhabricatorFileFilePHIDType.php
@@ -43,7 +43,7 @@
   }
 
   public function canLoadNamedObject($name) {
-    return preg_match('/^F\d*[1-9]\d*$/', $name);
+    return @preg_match('/^F\d*[1-9]\d*$/', $name);
   }
 
   public function loadNamedObjects(
@@ -52,7 +52,7 @@
 
     $id_map = array();
     foreach ($names as $name) {
-      $id = (int)substr($name, 1);
+      $id = (int)@substr($name, 1);
       $id_map[$id][] = $name;
     }
 
diff --git a/src/applications/files/storage/PhabricatorFile.php b/src/applications/files/storage/PhabricatorFile.php
--- a/src/applications/files/storage/PhabricatorFile.php
+++ b/src/applications/files/storage/PhabricatorFile.php
@@ -211,7 +211,7 @@
     $file_data = Filesystem::readFile($tmp_name);
     $file_size = idx($spec, 'size');
 
-    if (strlen($file_data) != $file_size) {
+    if (@strlen($file_data) != $file_size) {
       throw new Exception(pht('File size disagrees with uploaded size.'));
     }
 
@@ -288,7 +288,7 @@
     // update the parent file if a MIME type hasn't been provided. This matters
     // for large media files like video.
     $mime_type = idx($params, 'mime-type');
-    if (!strlen($mime_type)) {
+    if (!@strlen($mime_type)) {
       $file->setMimeType('application/octet-stream');
     }
 
@@ -328,7 +328,7 @@
     if (isset($params['storageEngines'])) {
       $engines = $params['storageEngines'];
     } else {
-      $size = strlen($data);
+      $size = @strlen($data);
       $engines = PhabricatorFileStorageEngine::loadStorageEngines($size);
 
       if (!$engines) {
@@ -406,7 +406,7 @@
         $exceptions);
     }
 
-    $file->setByteSize(strlen($data));
+    $file->setByteSize(@strlen($data));
 
     $hash = self::hashFileContent($data);
     $file->setContentHash($hash);
@@ -552,7 +552,7 @@
 
     $data_handle = $engine->writeFile($formatted_data, $params);
 
-    if (!$data_handle || strlen($data_handle) > 255) {
+    if (!$data_handle || @strlen($data_handle) > 255) {
       // This indicates an improperly implemented storage engine.
       throw new PhabricatorFileStorageConfigurationException(
         pht(
@@ -565,7 +565,7 @@
     }
 
     $engine_identifier = $engine->getEngineIdentifier();
-    if (!$engine_identifier || strlen($engine_identifier) > 32) {
+    if (!$engine_identifier || @strlen($engine_identifier) > 32) {
       throw new PhabricatorFileStorageConfigurationException(
         pht(
           "Storage engine '%s' returned an improper engine identifier '{%s}': ".
@@ -856,7 +856,7 @@
     // instance identity in the path allows us to distinguish between requests
     // originating from different instances but served through the same CDN.
     $instance = PhabricatorEnv::getEnvConfig('cluster.instance');
-    if (strlen($instance)) {
+    if (@strlen($instance)) {
       $parts[] = '@'.$instance;
     }
 
@@ -903,7 +903,7 @@
     $parts[] = 'xform';
 
     $instance = PhabricatorEnv::getEnvConfig('cluster.instance');
-    if (strlen($instance)) {
+    if (@strlen($instance)) {
       $parts[] = '@'.$instance;
     }
 
@@ -971,7 +971,7 @@
     // warns you if you don't have complete support.
 
     $matches = null;
-    $ok = preg_match(
+    $ok = @preg_match(
       '@^image/(gif|png|jpe?g)@',
       $this->getViewableMimeType(),
       $matches);
@@ -1049,7 +1049,7 @@
     $mime_map = PhabricatorEnv::getEnvConfig('files.viewable-mime-types');
 
     $mime_type = $this->getMimeType();
-    $mime_parts = explode(';', $mime_type);
+    $mime_parts = @explode(';', $mime_type);
     $mime_type = trim(reset($mime_parts));
 
     return idx($mime_map, $mime_type);
@@ -1278,7 +1278,7 @@
   public function getAltText() {
     $alt = $this->getCustomAltText();
 
-    if (strlen($alt)) {
+    if (@strlen($alt)) {
       return $alt;
     }
 
@@ -1292,7 +1292,7 @@
   public function setCustomAltText($value) {
     $value = phutil_string_cast($value);
 
-    if (!strlen($value)) {
+    if (!@strlen($value)) {
       $value = null;
     }
 
@@ -1309,7 +1309,7 @@
     $parts = array();
 
     $name = $this->getName();
-    if (strlen($name)) {
+    if (@strlen($name)) {
       $parts[] = $name;
     }
 
@@ -1567,7 +1567,7 @@
     // redirects here anyway, since we only ever transform viewable images
     // right now.
 
-    $is_external = strlen(id(new PhutilURI($uri))->getDomain());
+    $is_external = @strlen(id(new PhutilURI($uri))->getDomain());
 
     return id(new AphrontRedirectResponse())
       ->setIsExternal($is_external)
diff --git a/src/applications/files/uploadsource/PhabricatorFileUploadSource.php b/src/applications/files/uploadsource/PhabricatorFileUploadSource.php
--- a/src/applications/files/uploadsource/PhabricatorFileUploadSource.php
+++ b/src/applications/files/uploadsource/PhabricatorFileUploadSource.php
@@ -113,7 +113,7 @@
     }
 
     $read_bytes = $data->current();
-    $this->totalBytesRead += strlen($read_bytes);
+    $this->totalBytesRead += @strlen($read_bytes);
 
     if ($this->byteLimit && ($this->totalBytesRead > $this->byteLimit)) {
       throw new PhabricatorFileUploadSourceByteLimitException();
@@ -223,7 +223,7 @@
     $rope = $this->getRope();
 
     $data = $rope->getPrefixBytes($max_length);
-    $actual_length = strlen($data);
+    $actual_length = @strlen($data);
     $rope->removeBytesFromHead($actual_length);
 
     $params = array(
diff --git a/src/applications/files/view/PhabricatorGlobalUploadTargetView.php b/src/applications/files/view/PhabricatorGlobalUploadTargetView.php
--- a/src/applications/files/view/PhabricatorGlobalUploadTargetView.php
+++ b/src/applications/files/view/PhabricatorGlobalUploadTargetView.php
@@ -67,7 +67,7 @@
     require_celerity_resource('global-drag-and-drop-css');
 
     $hint_text = $this->getHintText();
-    if (!strlen($hint_text)) {
+    if (!@strlen($hint_text)) {
       $hint_text = "\xE2\x87\xAA ".pht('Drop Files to Upload');
     }
 
diff --git a/src/applications/files/xaction/PhabricatorFileAltTextTransaction.php b/src/applications/files/xaction/PhabricatorFileAltTextTransaction.php
--- a/src/applications/files/xaction/PhabricatorFileAltTextTransaction.php
+++ b/src/applications/files/xaction/PhabricatorFileAltTextTransaction.php
@@ -12,7 +12,7 @@
   public function generateNewValue($object, $value) {
     $value = phutil_string_cast($value);
 
-    if (!strlen($value)) {
+    if (!@strlen($value)) {
       $value = null;
     }
 
@@ -27,12 +27,12 @@
     $old_value = $this->getOldValue();
     $new_value = $this->getNewValue();
 
-    if (!strlen($old_value)) {
+    if (!@strlen($old_value)) {
       return pht(
         '%s set the alternate text for this file to %s.',
         $this->renderAuthor(),
         $this->renderNewValue());
-    } else if (!strlen($new_value)) {
+    } else if (!@strlen($new_value)) {
       return pht(
         '%s removed the alternate text for this file (was %s).',
         $this->renderAuthor(),
@@ -50,13 +50,13 @@
     $old_value = $this->getOldValue();
     $new_value = $this->getNewValue();
 
-    if (!strlen($old_value)) {
+    if (!@strlen($old_value)) {
       return pht(
         '%s set the alternate text for %s to %s.',
         $this->renderAuthor(),
         $this->renderObject(),
         $this->renderNewValue());
-    } else if (!strlen($new_value)) {
+    } else if (!@strlen($new_value)) {
       return pht(
         '%s removed the alternate text for %s (was %s).',
         $this->renderAuthor(),
@@ -79,7 +79,7 @@
     foreach ($xactions as $xaction) {
       $new_value = $xaction->getNewValue();
 
-      $new_length = strlen($new_value);
+      $new_length = @strlen($new_value);
       if ($new_length > $max_length) {
         $errors[] = $this->newInvalidError(
           pht(
diff --git a/src/applications/files/xaction/PhabricatorFileNameTransaction.php b/src/applications/files/xaction/PhabricatorFileNameTransaction.php
--- a/src/applications/files/xaction/PhabricatorFileNameTransaction.php
+++ b/src/applications/files/xaction/PhabricatorFileNameTransaction.php
@@ -40,7 +40,7 @@
     $max_length = $object->getColumnMaximumByteLength('name');
     foreach ($xactions as $xaction) {
       $new_value = $xaction->getNewValue();
-      $new_length = strlen($new_value);
+      $new_length = @strlen($new_value);
       if ($new_length > $max_length) {
         $errors[] = $this->newInvalidError(
           pht(
diff --git a/src/applications/fund/controller/FundInitiativeBackController.php b/src/applications/fund/controller/FundInitiativeBackController.php
--- a/src/applications/fund/controller/FundInitiativeBackController.php
+++ b/src/applications/fund/controller/FundInitiativeBackController.php
@@ -53,7 +53,7 @@
         $account = $accounts[$v_account];
       }
 
-      if (!strlen($v_amount)) {
+      if (!@strlen($v_amount)) {
         $errors[] = pht(
           'You must specify how much money you want to contribute to the '.
           'initiative.');
diff --git a/src/applications/fund/controller/FundInitiativeViewController.php b/src/applications/fund/controller/FundInitiativeViewController.php
--- a/src/applications/fund/controller/FundInitiativeViewController.php
+++ b/src/applications/fund/controller/FundInitiativeViewController.php
@@ -94,7 +94,7 @@
       $initiative->getTotalAsCurrency()->formatForDisplay());
 
     $description = $initiative->getDescription();
-    if (strlen($description)) {
+    if (@strlen($description)) {
       $description = new PHUIRemarkupView($viewer, $description);
       $view->addSectionHeader(
         pht('Description'), PHUIPropertyListView::ICON_SUMMARY);
@@ -102,7 +102,7 @@
     }
 
     $risks = $initiative->getRisks();
-    if (strlen($risks)) {
+    if (@strlen($risks)) {
       $risks = new PHUIRemarkupView($viewer, $risks);
       $view->addSectionHeader(
         pht('Risks/Challenges'), 'fa-ambulance');
diff --git a/src/applications/fund/phid/FundInitiativePHIDType.php b/src/applications/fund/phid/FundInitiativePHIDType.php
--- a/src/applications/fund/phid/FundInitiativePHIDType.php
+++ b/src/applications/fund/phid/FundInitiativePHIDType.php
@@ -47,7 +47,7 @@
   }
 
   public function canLoadNamedObject($name) {
-    return preg_match('/^I\d*[1-9]\d*$/i', $name);
+    return @preg_match('/^I\d*[1-9]\d*$/i', $name);
   }
 
   public function loadNamedObjects(
@@ -56,7 +56,7 @@
 
     $id_map = array();
     foreach ($names as $name) {
-      $id = (int)substr($name, 1);
+      $id = (int)@substr($name, 1);
       $id_map[$id][] = $name;
     }
 
diff --git a/src/applications/fund/xaction/FundInitiativeDescriptionTransaction.php b/src/applications/fund/xaction/FundInitiativeDescriptionTransaction.php
--- a/src/applications/fund/xaction/FundInitiativeDescriptionTransaction.php
+++ b/src/applications/fund/xaction/FundInitiativeDescriptionTransaction.php
@@ -16,7 +16,7 @@
   public function shouldHide() {
     $old = $this->getOldValue();
     $new = $this->getNewValue();
-    if (!strlen($old) && !strlen($new)) {
+    if (!@strlen($old) && !@strlen($new)) {
       return true;
     }
     return false;
diff --git a/src/applications/fund/xaction/FundInitiativeNameTransaction.php b/src/applications/fund/xaction/FundInitiativeNameTransaction.php
--- a/src/applications/fund/xaction/FundInitiativeNameTransaction.php
+++ b/src/applications/fund/xaction/FundInitiativeNameTransaction.php
@@ -15,7 +15,7 @@
 
   public function getTitle() {
     $old = $this->getOldValue();
-    if (!strlen($old)) {
+    if (!@strlen($old)) {
       return pht(
         '%s created this initiative.',
         $this->renderAuthor());
@@ -30,7 +30,7 @@
 
   public function getTitleForFeed() {
     $old = $this->getOldValue();
-    if (!strlen($old)) {
+    if (!@strlen($old)) {
       return pht(
         '%s created initiative %s.',
         $this->renderAuthor(),
@@ -56,7 +56,7 @@
     $max_length = $object->getColumnMaximumByteLength('name');
     foreach ($xactions as $xaction) {
       $new_value = $xaction->getNewValue();
-      $new_length = strlen($new_value);
+      $new_length = @strlen($new_value);
       if ($new_length > $max_length) {
         $errors[] = $this->newInvalidError(
           pht('The name can be no longer than %s characters.',
diff --git a/src/applications/fund/xaction/FundInitiativeRisksTransaction.php b/src/applications/fund/xaction/FundInitiativeRisksTransaction.php
--- a/src/applications/fund/xaction/FundInitiativeRisksTransaction.php
+++ b/src/applications/fund/xaction/FundInitiativeRisksTransaction.php
@@ -16,7 +16,7 @@
   public function shouldHide() {
     $old = $this->getOldValue();
     $new = $this->getNewValue();
-    if (!strlen($old) && !strlen($new)) {
+    if (!@strlen($old) && !@strlen($new)) {
       return true;
     }
     return false;
diff --git a/src/applications/harbormaster/artifact/HarbormasterURIArtifact.php b/src/applications/harbormaster/artifact/HarbormasterURIArtifact.php
--- a/src/applications/harbormaster/artifact/HarbormasterURIArtifact.php
+++ b/src/applications/harbormaster/artifact/HarbormasterURIArtifact.php
@@ -96,7 +96,7 @@
     $uri = new PhutilURI($raw_uri);
 
     $protocol = $uri->getProtocol();
-    if (!strlen($protocol)) {
+    if (!@strlen($protocol)) {
       throw new Exception(
         pht(
           'Unable to identify the protocol for URI "%s". URIs must be '.
diff --git a/src/applications/harbormaster/controller/HarbormasterBuildLogRenderController.php b/src/applications/harbormaster/controller/HarbormasterBuildLogRenderController.php
--- a/src/applications/harbormaster/controller/HarbormasterBuildLogRenderController.php
+++ b/src/applications/harbormaster/controller/HarbormasterBuildLogRenderController.php
@@ -135,7 +135,7 @@
       $lines = $this->getLines($data);
       $line_data = array();
       foreach ($lines as $line_text) {
-        $length = strlen($line_text);
+        $length = @strlen($line_text);
         $line_data[] = array(
           'offset' => $offset,
           'length' => $length,
@@ -277,14 +277,14 @@
         }
 
         $trim = ($view_offset - $line_offset);
-        if ($trim && ($trim >= strlen($line['data']))) {
+        if ($trim && ($trim >= @strlen($line['data']))) {
           unset($lines[$line_key]);
           continue;
         }
 
-        $line_data = substr($line['data'], $trim);
+        $line_data = @substr($line['data'], $trim);
         $lines[$line_key]['data'] = $line_data;
-        $lines[$line_key]['length'] = strlen($line_data);
+        $lines[$line_key]['length'] = @strlen($line_data);
         $lines[$line_key]['offset'] += $trim;
         break;
       }
@@ -297,14 +297,14 @@
         }
 
         $trim = ($line_end - $view_end);
-        if ($trim && ($trim >= strlen($line['data']))) {
+        if ($trim && ($trim >= @strlen($line['data']))) {
           unset($lines[$line_key]);
           continue;
         }
 
-        $line_data = substr($line['data'], -$trim);
+        $line_data = @substr($line['data'], -$trim);
         $lines[$line_key]['data'] = $line_data;
-        $lines[$line_key]['length'] = strlen($line_data);
+        $lines[$line_key]['length'] = @strlen($line_data);
       }
 
       $views[$view_key]['viewData'] = $lines;
@@ -838,7 +838,7 @@
         }
       }
 
-      $offset += strlen($line);
+      $offset += @strlen($line);
 
       if ($max_offset === null) {
         if ($number === $range_max) {
diff --git a/src/applications/harbormaster/controller/HarbormasterPlanViewController.php b/src/applications/harbormaster/controller/HarbormasterPlanViewController.php
--- a/src/applications/harbormaster/controller/HarbormasterPlanViewController.php
+++ b/src/applications/harbormaster/controller/HarbormasterPlanViewController.php
@@ -308,7 +308,7 @@
       $error = null;
 
       $key = idx($artifact, 'key');
-      if (!strlen($key)) {
+      if (!@strlen($key)) {
         $bound = phutil_tag('em', array(), pht('(null)'));
         if ($is_input) {
           // This is an unbound input. For now, all inputs are always required.
diff --git a/src/applications/harbormaster/controller/HarbormasterStepEditController.php b/src/applications/harbormaster/controller/HarbormasterStepEditController.php
--- a/src/applications/harbormaster/controller/HarbormasterStepEditController.php
+++ b/src/applications/harbormaster/controller/HarbormasterStepEditController.php
@@ -139,7 +139,7 @@
       ->setUser($viewer);
 
     $instructions = $implementation->getEditInstructions();
-    if (strlen($instructions)) {
+    if (@strlen($instructions)) {
       $form->appendRemarkupInstructions($instructions);
     }
 
diff --git a/src/applications/harbormaster/controller/HarbormasterStepViewController.php b/src/applications/harbormaster/controller/HarbormasterStepViewController.php
--- a/src/applications/harbormaster/controller/HarbormasterStepViewController.php
+++ b/src/applications/harbormaster/controller/HarbormasterStepViewController.php
@@ -99,7 +99,7 @@
       $view);
 
     $description = $step->getDescription();
-    if (strlen($description)) {
+    if (@strlen($description)) {
       $view->addSectionHeader(
         pht('Description'),
         PHUIPropertyListView::ICON_SUMMARY);
diff --git a/src/applications/harbormaster/editor/HarbormasterBuildPlanEditEngine.php b/src/applications/harbormaster/editor/HarbormasterBuildPlanEditEngine.php
--- a/src/applications/harbormaster/editor/HarbormasterBuildPlanEditEngine.php
+++ b/src/applications/harbormaster/editor/HarbormasterBuildPlanEditEngine.php
@@ -103,7 +103,7 @@
         $key);
       $behavior_option = $object->getPlanProperty($storage_key);
 
-      if (!strlen($behavior_option)) {
+      if (!@strlen($behavior_option)) {
         $behavior_option = $behavior->getPlanOption($object)->getKey();
       }
 
diff --git a/src/applications/harbormaster/integration/circleci/HarbormasterCircleCIBuildStepImplementation.php b/src/applications/harbormaster/integration/circleci/HarbormasterCircleCIBuildStepImplementation.php
--- a/src/applications/harbormaster/integration/circleci/HarbormasterCircleCIBuildStepImplementation.php
+++ b/src/applications/harbormaster/integration/circleci/HarbormasterCircleCIBuildStepImplementation.php
@@ -117,7 +117,7 @@
     }
 
     $path_parts = trim($path, '/');
-    $path_parts = explode('/', $path_parts);
+    $path_parts = @explode('/', $path_parts);
     if (count($path_parts) < 2) {
       throw new Exception(
         pht(
diff --git a/src/applications/harbormaster/management/HarbormasterManagementArchiveLogsWorkflow.php b/src/applications/harbormaster/management/HarbormasterManagementArchiveLogsWorkflow.php
--- a/src/applications/harbormaster/management/HarbormasterManagementArchiveLogsWorkflow.php
+++ b/src/applications/harbormaster/management/HarbormasterManagementArchiveLogsWorkflow.php
@@ -104,7 +104,7 @@
     $hash = hash_init('sha1');
 
     foreach ($log->newChunkIterator() as $chunk) {
-      $bytes += strlen($chunk->getChunk());
+      $bytes += @strlen($chunk->getChunk());
       $chunks++;
       hash_update($hash, $chunk->getChunkDisplayText());
     }
diff --git a/src/applications/harbormaster/management/HarbormasterManagementWriteLogWorkflow.php b/src/applications/harbormaster/management/HarbormasterManagementWriteLogWorkflow.php
--- a/src/applications/harbormaster/management/HarbormasterManagementWriteLogWorkflow.php
+++ b/src/applications/harbormaster/management/HarbormasterManagementWriteLogWorkflow.php
@@ -75,7 +75,7 @@
         pht('Writing log, slowly...'));
 
       $offset = 0;
-      $total = strlen($content);
+      $total = @strlen($content);
       $pieces = str_split($content, $rate);
 
       $bar = id(new PhutilConsoleProgressBar())
@@ -83,7 +83,7 @@
 
       foreach ($pieces as $piece) {
         $log->append($piece);
-        $bar->update(strlen($piece));
+        $bar->update(@strlen($piece));
         sleep(1);
       }
 
diff --git a/src/applications/harbormaster/phid/HarbormasterBuildablePHIDType.php b/src/applications/harbormaster/phid/HarbormasterBuildablePHIDType.php
--- a/src/applications/harbormaster/phid/HarbormasterBuildablePHIDType.php
+++ b/src/applications/harbormaster/phid/HarbormasterBuildablePHIDType.php
@@ -57,7 +57,7 @@
   }
 
   public function canLoadNamedObject($name) {
-    return preg_match('/^B\d*[1-9]\d*$/i', $name);
+    return @preg_match('/^B\d*[1-9]\d*$/i', $name);
   }
 
   public function loadNamedObjects(
@@ -66,7 +66,7 @@
 
     $id_map = array();
     foreach ($names as $name) {
-      $id = (int)substr($name, 1);
+      $id = (int)@substr($name, 1);
       $id_map[$id][] = $name;
     }
 
diff --git a/src/applications/harbormaster/query/HarbormasterBuildPlanQuery.php b/src/applications/harbormaster/query/HarbormasterBuildPlanQuery.php
--- a/src/applications/harbormaster/query/HarbormasterBuildPlanQuery.php
+++ b/src/applications/harbormaster/query/HarbormasterBuildPlanQuery.php
@@ -98,7 +98,7 @@
         $this->statuses);
     }
 
-    if (strlen($this->datasourceQuery)) {
+    if (@strlen($this->datasourceQuery)) {
       $where[] = qsprintf(
         $conn,
         'plan.name LIKE %>',
diff --git a/src/applications/harbormaster/query/HarbormasterBuildUnitMessageQuery.php b/src/applications/harbormaster/query/HarbormasterBuildUnitMessageQuery.php
--- a/src/applications/harbormaster/query/HarbormasterBuildUnitMessageQuery.php
+++ b/src/applications/harbormaster/query/HarbormasterBuildUnitMessageQuery.php
@@ -61,7 +61,7 @@
     $indexes = array();
     foreach ($messages as $message) {
       $index = $message->getNameIndex();
-      if (strlen($index)) {
+      if (@strlen($index)) {
         $indexes[$index] = $index;
       }
     }
@@ -72,7 +72,7 @@
       foreach ($messages as $message) {
         $index = $message->getNameIndex();
 
-        if (!strlen($index)) {
+        if (!@strlen($index)) {
           continue;
         }
 
diff --git a/src/applications/harbormaster/step/HarbormasterBuildStepImplementation.php b/src/applications/harbormaster/step/HarbormasterBuildStepImplementation.php
--- a/src/applications/harbormaster/step/HarbormasterBuildStepImplementation.php
+++ b/src/applications/harbormaster/step/HarbormasterBuildStepImplementation.php
@@ -221,7 +221,7 @@
   }
 
   protected function formatValueForDescription($value) {
-    if (strlen($value)) {
+    if (@strlen($value)) {
       return phutil_tag('strong', array(), $value);
     } else {
       return phutil_tag('em', array(), pht('(null)'));
diff --git a/src/applications/harbormaster/storage/build/HarbormasterBuildLintMessage.php b/src/applications/harbormaster/storage/build/HarbormasterBuildLintMessage.php
--- a/src/applications/harbormaster/storage/build/HarbormasterBuildLintMessage.php
+++ b/src/applications/harbormaster/storage/build/HarbormasterBuildLintMessage.php
@@ -88,7 +88,7 @@
     $obj->setName($dict['name']);
 
     $description = idx($dict, 'description');
-    if (strlen($description)) {
+    if (@strlen($description)) {
       $obj->setProperty('description', $description);
     }
 
diff --git a/src/applications/harbormaster/storage/build/HarbormasterBuildLog.php b/src/applications/harbormaster/storage/build/HarbormasterBuildLog.php
--- a/src/applications/harbormaster/storage/build/HarbormasterBuildLog.php
+++ b/src/applications/harbormaster/storage/build/HarbormasterBuildLog.php
@@ -204,11 +204,11 @@
     $chop_tail = ($range['tail'] - $end);
 
     if ($chop_head) {
-      $parts = substr($parts, $chop_head);
+      $parts = @substr($parts, $chop_head);
     }
 
     if ($chop_tail) {
-      $parts = substr($parts, 0, -$chop_tail);
+      $parts = @substr($parts, 0, -$chop_tail);
     }
 
     return $parts;
@@ -284,7 +284,7 @@
   }
 
   public function getRenderURI($lines) {
-    if (strlen($lines)) {
+    if (@strlen($lines)) {
       $lines = '$'.$lines;
     }
 
@@ -359,7 +359,7 @@
     $mode) {
 
     $data = $rope->getPrefixBytes($length);
-    $size = strlen($data);
+    $size = @strlen($data);
 
     switch ($mode) {
       case HarbormasterBuildLogChunk::CHUNK_ENCODING_TEXT:
@@ -515,7 +515,7 @@
 
       $data_limit = ($chunk_limit - $prefix_size);
       $append_data = $rope->getPrefixBytes($data_limit);
-      $data_size = strlen($append_data);
+      $data_size = @strlen($append_data);
 
       $this->openTransaction();
         if ($append_id) {
@@ -550,7 +550,7 @@
   }
 
   public function updateLineMap($append_data, $marker_distance = null) {
-    $this->byteLength += strlen($append_data);
+    $this->byteLength += @strlen($append_data);
 
     if (!$marker_distance) {
       $marker_distance = (self::CHUNK_BYTE_LIMIT / 2);
@@ -585,12 +585,12 @@
     $next_marker = $last_marker + $marker_distance;
 
     $pos = 0;
-    $len = strlen($buffer);
+    $len = @strlen($buffer);
     while (true) {
       // If we only have a few bytes left in the buffer, leave it as a prefix
       // for next time.
       if (($len - $pos) <= ($max_utf8_width * 2)) {
-        $prefix = substr($buffer, $pos);
+        $prefix = @substr($buffer, $pos);
         break;
       }
 
@@ -641,7 +641,7 @@
         $slice_length--;
       }
 
-      $slice = substr($buffer, $pos, $slice_length);
+      $slice = @substr($buffer, $pos, $slice_length);
       $pos += $slice_length;
 
       $map_bytes += $slice_length;
diff --git a/src/applications/harbormaster/storage/build/HarbormasterBuildTarget.php b/src/applications/harbormaster/storage/build/HarbormasterBuildTarget.php
--- a/src/applications/harbormaster/storage/build/HarbormasterBuildTarget.php
+++ b/src/applications/harbormaster/storage/build/HarbormasterBuildTarget.php
@@ -197,7 +197,7 @@
   }
 
   public function getName() {
-    if (strlen($this->name) && !$this->isAutotarget()) {
+    if (@strlen($this->name) && !$this->isAutotarget()) {
       return $this->name;
     }
 
diff --git a/src/applications/harbormaster/storage/build/HarbormasterBuildUnitMessage.php b/src/applications/harbormaster/storage/build/HarbormasterBuildUnitMessage.php
--- a/src/applications/harbormaster/storage/build/HarbormasterBuildUnitMessage.php
+++ b/src/applications/harbormaster/storage/build/HarbormasterBuildUnitMessage.php
@@ -102,7 +102,7 @@
     $obj->setDuration((float)idx($dict, 'duration'));
 
     $path = idx($dict, 'path');
-    if (strlen($path)) {
+    if (@strlen($path)) {
       $obj->setProperty('path', $path);
     }
 
@@ -182,7 +182,7 @@
     $message = null;
 
     $full_details = $this->getUnitMessageDetails();
-    $byte_length = strlen($full_details);
+    $byte_length = @strlen($full_details);
 
     $text_limit = 1024 * 2;
     $remarkup_limit = 1024 * 8;
@@ -291,16 +291,16 @@
     $name = $this->getName();
 
     $namespace = $this->getNamespace();
-    if (strlen($namespace)) {
+    if (@strlen($namespace)) {
       $name = $namespace.'::'.$name;
     }
 
     $engine = $this->getEngine();
-    if (strlen($engine)) {
+    if (@strlen($engine)) {
       $name = $engine.' > '.$name;
     }
 
-    if (!strlen($name)) {
+    if (!@strlen($name)) {
       return pht('Nameless Test (%d)', $this->getID());
     }
 
diff --git a/src/applications/harbormaster/storage/configuration/HarbormasterBuildStep.php b/src/applications/harbormaster/storage/configuration/HarbormasterBuildStep.php
--- a/src/applications/harbormaster/storage/configuration/HarbormasterBuildStep.php
+++ b/src/applications/harbormaster/storage/configuration/HarbormasterBuildStep.php
@@ -79,7 +79,7 @@
   }
 
   public function getName() {
-    if (strlen($this->name)) {
+    if (@strlen($this->name)) {
       return $this->name;
     }
 
diff --git a/src/applications/harbormaster/view/HarbormasterLintPropertyView.php b/src/applications/harbormaster/view/HarbormasterLintPropertyView.php
--- a/src/applications/harbormaster/view/HarbormasterLintPropertyView.php
+++ b/src/applications/harbormaster/view/HarbormasterLintPropertyView.php
@@ -36,14 +36,14 @@
       $line = $message->getLine();
 
       $href = null;
-      if (strlen(idx($this->pathURIMap, $path))) {
+      if (@strlen(idx($this->pathURIMap, $path))) {
         $href = $this->pathURIMap[$path].max($line, 1);
       }
 
       $severity = $this->renderSeverity($message->getSeverity());
 
       $location = $path.':'.$line;
-      if (strlen($href)) {
+      if (@strlen($href)) {
         $location = phutil_tag(
           'a',
           array(
diff --git a/src/applications/harbormaster/view/HarbormasterUnitSummaryView.php b/src/applications/harbormaster/view/HarbormasterUnitSummaryView.php
--- a/src/applications/harbormaster/view/HarbormasterUnitSummaryView.php
+++ b/src/applications/harbormaster/view/HarbormasterUnitSummaryView.php
@@ -89,7 +89,7 @@
     }
 
     $excuse = $this->excuse;
-    if (strlen($excuse)) {
+    if (@strlen($excuse)) {
       $excuse_icon = id(new PHUIIconView())
         ->setIcon('fa-commenting-o red');
 
diff --git a/src/applications/herald/adapter/HeraldAdapter.php b/src/applications/herald/adapter/HeraldAdapter.php
--- a/src/applications/herald/adapter/HeraldAdapter.php
+++ b/src/applications/herald/adapter/HeraldAdapter.php
@@ -527,7 +527,7 @@
 
         foreach ((array)$field_value as $value) {
           try {
-            $result = phutil_preg_match($condition_pattern, $value);
+            $result = phutilpreg_match($condition_pattern, $value);
           } catch (PhutilRegexException $ex) {
             $message = array();
             $message[] = pht(
@@ -569,13 +569,13 @@
         $value_regexp = array_shift($regexp_pair);
 
         foreach ((array)$field_value as $key => $value) {
-          $key_matches = @preg_match($key_regexp, $key);
+          $key_matches = @@preg_match($key_regexp, $key);
           if ($key_matches === false) {
             throw new HeraldInvalidConditionException(
               pht('First regular expression is invalid!'));
           }
           if ($key_matches) {
-            $value_matches = @preg_match($value_regexp, $value);
+            $value_matches = @@preg_match($value_regexp, $value);
             if ($value_matches === false) {
               throw new HeraldInvalidConditionException(
                 pht('Second regular expression is invalid!'));
@@ -617,7 +617,7 @@
     switch ($condition_type) {
       case self::CONDITION_REGEXP:
       case self::CONDITION_NOT_REGEXP:
-        $ok = @preg_match($condition_value, '');
+        $ok = @@preg_match($condition_value, '');
         if ($ok === false) {
           throw new HeraldInvalidConditionException(
             pht(
@@ -650,7 +650,7 @@
         $key_regexp = array_shift($json);
         $val_regexp = array_shift($json);
 
-        $key_ok = @preg_match($key_regexp, '');
+        $key_ok = @@preg_match($key_regexp, '');
         if ($key_ok === false) {
           throw new HeraldInvalidConditionException(
             pht(
@@ -659,7 +659,7 @@
               $key_regexp));
         }
 
-        $val_ok = @preg_match($val_regexp, '');
+        $val_ok = @@preg_match($val_regexp, '');
         if ($val_ok === false) {
           throw new HeraldInvalidConditionException(
             pht(
diff --git a/src/applications/herald/controller/HeraldNewController.php b/src/applications/herald/controller/HeraldNewController.php
--- a/src/applications/herald/controller/HeraldNewController.php
+++ b/src/applications/herald/controller/HeraldNewController.php
@@ -35,7 +35,7 @@
           $e_object = null;
 
           if ($request->isFormPost()) {
-            if (strlen($object_name)) {
+            if (@strlen($object_name)) {
               $target_object = id(new PhabricatorObjectQuery())
                 ->setViewer($viewer)
                 ->withNames(array($object_name))
diff --git a/src/applications/herald/controller/HeraldRuleController.php b/src/applications/herald/controller/HeraldRuleController.php
--- a/src/applications/herald/controller/HeraldRuleController.php
+++ b/src/applications/herald/controller/HeraldRuleController.php
@@ -278,7 +278,7 @@
     $e_name = true;
     $errors = array();
 
-    if (!strlen($new_name)) {
+    if (!@strlen($new_name)) {
       $e_name = pht('Required');
       $errors[] = pht('Rule must have a name.');
     }
diff --git a/src/applications/herald/controller/HeraldWebhookTestController.php b/src/applications/herald/controller/HeraldWebhookTestController.php
--- a/src/applications/herald/controller/HeraldWebhookTestController.php
+++ b/src/applications/herald/controller/HeraldWebhookTestController.php
@@ -25,7 +25,7 @@
     if ($request->isFormPost()) {
 
       $v_object = $request->getStr('object');
-      if (!strlen($v_object)) {
+      if (!@strlen($v_object)) {
         $object = $hook;
       } else {
         $objects = id(new PhabricatorObjectQuery())
diff --git a/src/applications/herald/management/HeraldRuleManagementWorkflow.php b/src/applications/herald/management/HeraldRuleManagementWorkflow.php
--- a/src/applications/herald/management/HeraldRuleManagementWorkflow.php
+++ b/src/applications/herald/management/HeraldRuleManagementWorkflow.php
@@ -33,13 +33,13 @@
     $viewer = $this->getViewer();
 
     $rule_name = $args->getArg('rule');
-    if (!strlen($rule_name)) {
+    if (!@strlen($rule_name)) {
       throw new PhutilArgumentUsageException(
         pht('Specify a rule to edit with "--rule <id|monogram>".'));
     }
 
-    if (preg_match('/^H\d+/', $rule_name)) {
-      $rule_id = substr($rule_name, 1);
+    if (@preg_match('/^H\d+/', $rule_name)) {
+      $rule_id = @substr($rule_name, 1);
     } else {
       $rule_id = $rule_name;
     }
diff --git a/src/applications/herald/management/HeraldTestManagementWorkflow.php b/src/applications/herald/management/HeraldTestManagementWorkflow.php
--- a/src/applications/herald/management/HeraldTestManagementWorkflow.php
+++ b/src/applications/herald/management/HeraldTestManagementWorkflow.php
@@ -30,7 +30,7 @@
     $viewer = $this->getViewer();
 
     $object_name = $args->getArg('object');
-    if (!strlen($object_name)) {
+    if (!@strlen($object_name)) {
       throw new PhutilArgumentUsageException(
         pht('Specify an object to test rules for with "--object".'));
     }
@@ -69,7 +69,7 @@
 
 
     $content_type = $args->getArg('type');
-    if (!strlen($content_type)) {
+    if (!@strlen($content_type)) {
       throw new PhutilArgumentUsageException(
         pht(
           'Specify a content type to run rules for. For this object, valid '.
diff --git a/src/applications/herald/phid/HeraldRulePHIDType.php b/src/applications/herald/phid/HeraldRulePHIDType.php
--- a/src/applications/herald/phid/HeraldRulePHIDType.php
+++ b/src/applications/herald/phid/HeraldRulePHIDType.php
@@ -46,7 +46,7 @@
   }
 
   public function canLoadNamedObject($name) {
-    return preg_match('/^H\d*[1-9]\d*$/i', $name);
+    return @preg_match('/^H\d*[1-9]\d*$/i', $name);
   }
 
   public function loadNamedObjects(
@@ -55,7 +55,7 @@
 
     $id_map = array();
     foreach ($names as $name) {
-      $id = (int)substr($name, 1);
+      $id = (int)@substr($name, 1);
       $id_map[$id][] = $name;
     }
 
diff --git a/src/applications/herald/storage/__tests__/HeraldTranscriptTestCase.php b/src/applications/herald/storage/__tests__/HeraldTranscriptTestCase.php
--- a/src/applications/herald/storage/__tests__/HeraldTranscriptTestCase.php
+++ b/src/applications/herald/storage/__tests__/HeraldTranscriptTestCase.php
@@ -40,7 +40,7 @@
       array('a', 'b', 'c'),
       array_keys($truncated_fields['ma']));
     $this->assertEqual(
-      'abc!def!'.substr($short_string, 6),
+      'abc!def!'.@substr($short_string, 6),
       implode('!', $truncated_fields['ma']));
 
   }
diff --git a/src/applications/herald/storage/transcript/HeraldConditionResult.php b/src/applications/herald/storage/transcript/HeraldConditionResult.php
--- a/src/applications/herald/storage/transcript/HeraldConditionResult.php
+++ b/src/applications/herald/storage/transcript/HeraldConditionResult.php
@@ -34,7 +34,7 @@
         $error_class = $this->getDataProperty('exception.class');
         $error_message = $this->getDataProperty('exception.message');
 
-        if (!strlen($error_class)) {
+        if (!@strlen($error_class)) {
           $error_class = pht('Unknown Error');
         }
 
@@ -44,7 +44,7 @@
             break;
         }
 
-        if (!strlen($error_message)) {
+        if (!@strlen($error_message)) {
           $error_message = pht(
             'An unknown error occurred while evaluating this condition. No '.
             'additional information is available.');
diff --git a/src/applications/herald/storage/transcript/HeraldObjectTranscript.php b/src/applications/herald/storage/transcript/HeraldObjectTranscript.php
--- a/src/applications/herald/storage/transcript/HeraldObjectTranscript.php
+++ b/src/applications/herald/storage/transcript/HeraldObjectTranscript.php
@@ -69,11 +69,11 @@
 
   private static function truncateValue($value, $length) {
     if (is_string($value)) {
-      if (strlen($value) <= $length) {
+      if (@strlen($value) <= $length) {
         return $value;
       } else {
         // NOTE: PhutilUTF8StringTruncator has huge runtime for giant strings.
-        return phutil_utf8ize(substr($value, 0, $length)."\n<...>");
+        return phutil_utf8ize(@substr($value, 0, $length)."\n<...>");
       }
     } else if (is_array($value)) {
       foreach ($value as $key => $v) {
@@ -82,7 +82,7 @@
           unset($value[$key]);
         } else {
           $v = self::truncateValue($v, $length);
-          $length -= strlen($v);
+          $length -= @strlen($v);
           $value[$key] = $v;
         }
       }
diff --git a/src/applications/herald/storage/transcript/HeraldRuleResult.php b/src/applications/herald/storage/transcript/HeraldRuleResult.php
--- a/src/applications/herald/storage/transcript/HeraldRuleResult.php
+++ b/src/applications/herald/storage/transcript/HeraldRuleResult.php
@@ -46,11 +46,11 @@
         $error_class = $this->getDataProperty('exception.class');
         $error_message = $this->getDataProperty('exception.message');
 
-        if (!strlen($error_class)) {
+        if (!@strlen($error_class)) {
           $error_class = pht('Unknown Error');
         }
 
-        if (!strlen($error_message)) {
+        if (!@strlen($error_message)) {
           $error_message = pht(
             'An unknown error occurred while evaluating this condition. No '.
             'additional information is available.');
diff --git a/src/applications/herald/typeahead/HeraldRuleDatasource.php b/src/applications/herald/typeahead/HeraldRuleDatasource.php
--- a/src/applications/herald/typeahead/HeraldRuleDatasource.php
+++ b/src/applications/herald/typeahead/HeraldRuleDatasource.php
@@ -22,7 +22,7 @@
     $query = id(new HeraldRuleQuery())
       ->setViewer($viewer);
 
-    if (preg_match('/^[hH]\d+\z/', $raw_query)) {
+    if (@preg_match('/^[hH]\d+\z/', $raw_query)) {
       $id = trim($raw_query, 'hH');
       $id = (int)$id;
       $query->withIDs(array($id));
diff --git a/src/applications/herald/value/HeraldTextFieldValue.php b/src/applications/herald/value/HeraldTextFieldValue.php
--- a/src/applications/herald/value/HeraldTextFieldValue.php
+++ b/src/applications/herald/value/HeraldTextFieldValue.php
@@ -24,11 +24,11 @@
       $value = implode('', $value);
     }
 
-    if (!strlen($value)) {
+    if (!@strlen($value)) {
       return phutil_tag('em', array(), pht('None'));
     }
 
-    if (strlen($value) > 256) {
+    if (@strlen($value) > 256) {
       $value = phutil_tag(
         'textarea',
         array(
diff --git a/src/applications/herald/xaction/HeraldRuleNameTransaction.php b/src/applications/herald/xaction/HeraldRuleNameTransaction.php
--- a/src/applications/herald/xaction/HeraldRuleNameTransaction.php
+++ b/src/applications/herald/xaction/HeraldRuleNameTransaction.php
@@ -33,7 +33,7 @@
     foreach ($xactions as $xaction) {
       $new_value = $xaction->getNewValue();
 
-      $new_length = strlen($new_value);
+      $new_length = @strlen($new_value);
       if ($new_length > $max_length) {
         $errors[] = $this->newInvalidError(
           pht(
diff --git a/src/applications/herald/xaction/HeraldWebhookNameTransaction.php b/src/applications/herald/xaction/HeraldWebhookNameTransaction.php
--- a/src/applications/herald/xaction/HeraldWebhookNameTransaction.php
+++ b/src/applications/herald/xaction/HeraldWebhookNameTransaction.php
@@ -45,7 +45,7 @@
       $old_value = $this->generateOldValue($object);
       $new_value = $xaction->getNewValue();
 
-      $new_length = strlen($new_value);
+      $new_length = @strlen($new_value);
       if ($new_length > $max_length) {
         $errors[] = $this->newInvalidError(
           pht(
diff --git a/src/applications/herald/xaction/HeraldWebhookURITransaction.php b/src/applications/herald/xaction/HeraldWebhookURITransaction.php
--- a/src/applications/herald/xaction/HeraldWebhookURITransaction.php
+++ b/src/applications/herald/xaction/HeraldWebhookURITransaction.php
@@ -45,7 +45,7 @@
       $old_value = $this->generateOldValue($object);
       $new_value = $xaction->getNewValue();
 
-      $new_length = strlen($new_value);
+      $new_length = @strlen($new_value);
       if ($new_length > $max_length) {
         $errors[] = $this->newInvalidError(
           pht(
diff --git a/src/applications/home/menuitem/PhabricatorHomeLauncherProfileMenuItem.php b/src/applications/home/menuitem/PhabricatorHomeLauncherProfileMenuItem.php
--- a/src/applications/home/menuitem/PhabricatorHomeLauncherProfileMenuItem.php
+++ b/src/applications/home/menuitem/PhabricatorHomeLauncherProfileMenuItem.php
@@ -31,7 +31,7 @@
     PhabricatorProfileMenuItemConfiguration $config) {
     $name = $config->getMenuItemProperty('name');
 
-    if (strlen($name)) {
+    if (@strlen($name)) {
       return $name;
     }
 
diff --git a/src/applications/home/menuitem/PhabricatorHomeProfileMenuItem.php b/src/applications/home/menuitem/PhabricatorHomeProfileMenuItem.php
--- a/src/applications/home/menuitem/PhabricatorHomeProfileMenuItem.php
+++ b/src/applications/home/menuitem/PhabricatorHomeProfileMenuItem.php
@@ -26,7 +26,7 @@
     PhabricatorProfileMenuItemConfiguration $config) {
     $name = $config->getMenuItemProperty('name');
 
-    if (strlen($name)) {
+    if (@strlen($name)) {
       return $name;
     }
 
diff --git a/src/applications/legalpad/controller/LegalpadDocumentManageController.php b/src/applications/legalpad/controller/LegalpadDocumentManageController.php
--- a/src/applications/legalpad/controller/LegalpadDocumentManageController.php
+++ b/src/applications/legalpad/controller/LegalpadDocumentManageController.php
@@ -91,7 +91,7 @@
       $document_body, LegalpadDocumentBody::MARKUP_FIELD_TEXT);
 
     $preamble_box = null;
-    if (strlen($document->getPreamble())) {
+    if (@strlen($document->getPreamble())) {
       $preamble_text = new PHUIRemarkupView($viewer, $document->getPreamble());
       $view->addTextContent($preamble_text);
       $view->addSectionHeader('');
diff --git a/src/applications/legalpad/controller/LegalpadDocumentSignController.php b/src/applications/legalpad/controller/LegalpadDocumentSignController.php
--- a/src/applications/legalpad/controller/LegalpadDocumentSignController.php
+++ b/src/applications/legalpad/controller/LegalpadDocumentSignController.php
@@ -280,7 +280,7 @@
     }
 
     $preamble_box = null;
-    if (strlen($document->getPreamble())) {
+    if (@strlen($document->getPreamble())) {
       $preamble_text = new PHUIRemarkupView($viewer, $document->getPreamble());
 
       // NOTE: We're avoiding `setObject()` here so we don't pick up extra UI
@@ -376,7 +376,7 @@
           );
         } else if ($request->isFormPost()) {
           $email = new PhutilEmailAddress($request->getStr('email'));
-          if (strlen($email->getDomainName())) {
+          if (@strlen($email->getDomainName())) {
             $email_obj = id(new PhabricatorUserEmail())
               ->loadOneWhere('address = %s', $email->getAddress());
             if ($email_obj) {
@@ -565,7 +565,7 @@
 
     $name = $request->getStr('name');
 
-    if (!strlen($name)) {
+    if (!@strlen($name)) {
       $field_errors['name'] = pht('Required');
       $errors[] = pht('Name field is required.');
     } else {
@@ -580,7 +580,7 @@
       $email = $request->getStr('email');
 
       $addr_obj = null;
-      if (!strlen($email)) {
+      if (!@strlen($email)) {
         $field_errors['email'] = pht('Required');
         $errors[] = pht('Email field is required.');
       } else {
@@ -617,7 +617,7 @@
 
     $name = $request->getStr('name');
 
-    if (!strlen($name)) {
+    if (!@strlen($name)) {
       $field_errors['name'] = pht('Required');
       $errors[] = pht('Company name is required.');
     } else {
@@ -626,7 +626,7 @@
     $signature_data['name'] = $name;
 
     $address = $request->getStr('address');
-    if (!strlen($address)) {
+    if (!@strlen($address)) {
       $field_errors['address'] = pht('Required');
       $errors[] = pht('Company address is required.');
     } else {
@@ -635,7 +635,7 @@
     $signature_data['address'] = $address;
 
     $contact_name = $request->getStr('contact.name');
-    if (!strlen($contact_name)) {
+    if (!@strlen($contact_name)) {
       $field_errors['contact.name'] = pht('Required');
       $errors[] = pht('Contact name is required.');
     } else {
@@ -645,7 +645,7 @@
 
     $email = $request->getStr('email');
     $addr_obj = null;
-    if (!strlen($email)) {
+    if (!@strlen($email)) {
       $field_errors['email'] = pht('Required');
       $errors[] = pht('Contact email is required.');
     } else {
diff --git a/src/applications/legalpad/controller/LegalpadDocumentSignatureAddController.php b/src/applications/legalpad/controller/LegalpadDocumentSignatureAddController.php
--- a/src/applications/legalpad/controller/LegalpadDocumentSignatureAddController.php
+++ b/src/applications/legalpad/controller/LegalpadDocumentSignatureAddController.php
@@ -67,7 +67,7 @@
         }
       } else {
         $company_name = $v_name;
-        if (!strlen($company_name)) {
+        if (!@strlen($company_name)) {
           $e_name = pht('Required');
           $errors[] = pht('You must choose a company to add an exemption for.');
         }
diff --git a/src/applications/legalpad/mail/LegalpadMailReceiver.php b/src/applications/legalpad/mail/LegalpadMailReceiver.php
--- a/src/applications/legalpad/mail/LegalpadMailReceiver.php
+++ b/src/applications/legalpad/mail/LegalpadMailReceiver.php
@@ -12,7 +12,7 @@
   }
 
   protected function loadObject($pattern, PhabricatorUser $viewer) {
-    $id = (int)substr($pattern, 1);
+    $id = (int)@substr($pattern, 1);
 
     return id(new LegalpadDocumentQuery())
       ->setViewer($viewer)
diff --git a/src/applications/legalpad/phid/PhabricatorLegalpadDocumentPHIDType.php b/src/applications/legalpad/phid/PhabricatorLegalpadDocumentPHIDType.php
--- a/src/applications/legalpad/phid/PhabricatorLegalpadDocumentPHIDType.php
+++ b/src/applications/legalpad/phid/PhabricatorLegalpadDocumentPHIDType.php
@@ -43,7 +43,7 @@
   }
 
   public function canLoadNamedObject($name) {
-    return preg_match('/^L\d*[1-9]\d*$/i', $name);
+    return @preg_match('/^L\d*[1-9]\d*$/i', $name);
   }
 
   public function loadNamedObjects(
@@ -52,7 +52,7 @@
 
     $id_map = array();
     foreach ($names as $name) {
-      $id = (int)substr($name, 1);
+      $id = (int)@substr($name, 1);
       $id_map[$id][] = $name;
     }
 
diff --git a/src/applications/legalpad/query/LegalpadDocumentSignatureSearchEngine.php b/src/applications/legalpad/query/LegalpadDocumentSignatureSearchEngine.php
--- a/src/applications/legalpad/query/LegalpadDocumentSignatureSearchEngine.php
+++ b/src/applications/legalpad/query/LegalpadDocumentSignatureSearchEngine.php
@@ -127,12 +127,12 @@
     }
 
     $name_contains = $saved->getParameter('nameContains');
-    if (strlen($name_contains)) {
+    if (@strlen($name_contains)) {
       $query->withNameContains($name_contains);
     }
 
     $email_contains = $saved->getParameter('emailContains');
-    if (strlen($email_contains)) {
+    if (@strlen($email_contains)) {
       $query->withEmailContains($email_contains);
     }
 
diff --git a/src/applications/legalpad/xaction/LegalpadDocumentTextTransaction.php b/src/applications/legalpad/xaction/LegalpadDocumentTextTransaction.php
--- a/src/applications/legalpad/xaction/LegalpadDocumentTextTransaction.php
+++ b/src/applications/legalpad/xaction/LegalpadDocumentTextTransaction.php
@@ -19,7 +19,7 @@
   public function getTitle() {
     $old = $this->getOldValue();
 
-    if (!strlen($old)) {
+    if (!@strlen($old)) {
       return pht(
         '%s set the document text.',
         $this->renderAuthor());
diff --git a/src/applications/legalpad/xaction/LegalpadDocumentTitleTransaction.php b/src/applications/legalpad/xaction/LegalpadDocumentTitleTransaction.php
--- a/src/applications/legalpad/xaction/LegalpadDocumentTitleTransaction.php
+++ b/src/applications/legalpad/xaction/LegalpadDocumentTitleTransaction.php
@@ -19,7 +19,7 @@
   public function getTitle() {
     $old = $this->getOldValue();
 
-    if (!strlen($old)) {
+    if (!@strlen($old)) {
       return pht(
         '%s created this document.',
         $this->renderAuthor());
@@ -35,7 +35,7 @@
   public function getTitleForFeed() {
     $old = $this->getOldValue();
 
-    if (!strlen($old)) {
+    if (!@strlen($old)) {
       return pht(
         '%s created %s.',
         $this->renderAuthor(),
@@ -61,7 +61,7 @@
     $max_length = $object->getColumnMaximumByteLength('title');
     foreach ($xactions as $xaction) {
       $new_value = $xaction->getNewValue();
-      $new_length = strlen($new_value);
+      $new_length = @strlen($new_value);
       if ($new_length > $max_length) {
         $errors[] = $this->newInvalidError(
           pht('The title can be no longer than %s characters.',
diff --git a/src/applications/lipsum/management/PhabricatorLipsumGenerateWorkflow.php b/src/applications/lipsum/management/PhabricatorLipsumGenerateWorkflow.php
--- a/src/applications/lipsum/management/PhabricatorLipsumGenerateWorkflow.php
+++ b/src/applications/lipsum/management/PhabricatorLipsumGenerateWorkflow.php
@@ -103,7 +103,7 @@
           }
 
           // If there's a partial match, match that generator but continue.
-          if (strpos($name, $arg) !== false) {
+          if (@strpos($name, $arg) !== false) {
             $matches[] = $generator;
           }
         }
diff --git a/src/applications/macro/engine/PhabricatorMemeEngine.php b/src/applications/macro/engine/PhabricatorMemeEngine.php
--- a/src/applications/macro/engine/PhabricatorMemeEngine.php
+++ b/src/applications/macro/engine/PhabricatorMemeEngine.php
@@ -182,7 +182,7 @@
     // changes to the image.
     $above_text = $this->getAboveText();
     $below_text = $this->getBelowText();
-    if (!strlen(trim($above_text)) && !strlen(trim($below_text))) {
+    if (!@strlen(trim($above_text)) && !@strlen(trim($below_text))) {
       return $template_data;
     }
 
@@ -272,7 +272,7 @@
     $size = $metrics['size'];
 
     $above = $this->getAboveText();
-    if (strlen($above)) {
+    if (@strlen($above)) {
       $x = (int)floor(($dx - $metrics['text']['above']['width']) / 2);
       $y = $metrics['text']['above']['height'] + 12;
 
@@ -280,7 +280,7 @@
     }
 
     $below = $this->getBelowText();
-    if (strlen($below)) {
+    if (@strlen($below)) {
       $x = (int)floor(($dx - $metrics['text']['below']['width']) / 2);
       $y = $dy - 12 - $metrics['text']['below']['descend'];
 
diff --git a/src/applications/macro/mail/PhabricatorMacroMailReceiver.php b/src/applications/macro/mail/PhabricatorMacroMailReceiver.php
--- a/src/applications/macro/mail/PhabricatorMacroMailReceiver.php
+++ b/src/applications/macro/mail/PhabricatorMacroMailReceiver.php
@@ -12,7 +12,7 @@
   }
 
   protected function loadObject($pattern, PhabricatorUser $viewer) {
-    $id = (int)substr($pattern, 4);
+    $id = (int)@substr($pattern, 4);
 
     return id(new PhabricatorMacroQuery())
       ->setViewer($viewer)
diff --git a/src/applications/macro/markup/PhabricatorMemeRemarkupRule.php b/src/applications/macro/markup/PhabricatorMemeRemarkupRule.php
--- a/src/applications/macro/markup/PhabricatorMemeRemarkupRule.php
+++ b/src/applications/macro/markup/PhabricatorMemeRemarkupRule.php
@@ -61,14 +61,14 @@
       $parts = array();
 
       $above = $options['above'];
-      if (strlen($above)) {
+      if (@strlen($above)) {
         $parts[] = pht('"%s"', $above);
       }
 
       $parts[] = $options['src'].' <'.$uri.'>';
 
       $below = $options['below'];
-      if (strlen($below)) {
+      if (@strlen($below)) {
         $parts[] = pht('"%s"', $below);
       }
 
diff --git a/src/applications/macro/query/PhabricatorMacroQuery.php b/src/applications/macro/query/PhabricatorMacroQuery.php
--- a/src/applications/macro/query/PhabricatorMacroQuery.php
+++ b/src/applications/macro/query/PhabricatorMacroQuery.php
@@ -128,7 +128,7 @@
         $this->authorPHIDs);
     }
 
-    if (strlen($this->nameLike)) {
+    if (@strlen($this->nameLike)) {
       $where[] = qsprintf(
         $conn,
         'm.name LIKE %~',
@@ -142,7 +142,7 @@
         $this->names);
     }
 
-    if (strlen($this->namePrefix)) {
+    if (@strlen($this->namePrefix)) {
       $where[] = qsprintf(
         $conn,
         'm.name LIKE %>',
diff --git a/src/applications/macro/query/PhabricatorMacroSearchEngine.php b/src/applications/macro/query/PhabricatorMacroSearchEngine.php
--- a/src/applications/macro/query/PhabricatorMacroSearchEngine.php
+++ b/src/applications/macro/query/PhabricatorMacroSearchEngine.php
@@ -69,7 +69,7 @@
       $query->withNames($map['names']);
     }
 
-    if (strlen($map['nameLike'])) {
+    if (@strlen($map['nameLike'])) {
       $query->withNameLike($map['nameLike']);
     }
 
diff --git a/src/applications/macro/xaction/PhabricatorMacroNameTransaction.php b/src/applications/macro/xaction/PhabricatorMacroNameTransaction.php
--- a/src/applications/macro/xaction/PhabricatorMacroNameTransaction.php
+++ b/src/applications/macro/xaction/PhabricatorMacroNameTransaction.php
@@ -45,7 +45,7 @@
       $old_value = $this->generateOldValue($object);
       $new_value = $xaction->getNewValue();
 
-      $new_length = strlen($new_value);
+      $new_length = @strlen($new_value);
       if ($new_length > $max_length) {
         $errors[] = $this->newInvalidError(
           pht('The name can be no longer than %s characters.',
@@ -83,12 +83,12 @@
   }
 
   public static function isValidMacroName($name) {
-    if (preg_match('/^[:_-]+\z/', $name)) {
+    if (@preg_match('/^[:_-]+\z/', $name)) {
       return false;
     }
 
     // Accept trivial macro names.
-    if (preg_match('/^[a-z0-9:_-]{3,}\z/', $name)) {
+    if (@preg_match('/^[a-z0-9:_-]{3,}\z/', $name)) {
       return true;
     }
 
@@ -105,7 +105,7 @@
         continue;
       }
 
-      if (preg_match('/^[^a-z0-9:_-]/', $character)) {
+      if (@preg_match('/^[^a-z0-9:_-]/', $character)) {
         return false;
       }
     }
diff --git a/src/applications/maniphest/constants/ManiphestTaskPriority.php b/src/applications/maniphest/constants/ManiphestTaskPriority.php
--- a/src/applications/maniphest/constants/ManiphestTaskPriority.php
+++ b/src/applications/maniphest/constants/ManiphestTaskPriority.php
@@ -183,12 +183,12 @@
   }
 
   private static function isValidPriorityKeyword($keyword) {
-    if (!strlen($keyword) || strlen($keyword) > 64) {
+    if (!@strlen($keyword) || @strlen($keyword) > 64) {
       return false;
     }
 
     // Alphanumeric, but not exclusively numeric
-    if (!preg_match('/^(?![0-9]*$)[a-zA-Z0-9]+$/', $keyword)) {
+    if (!@preg_match('/^(?![0-9]*$)[a-zA-Z0-9]+$/', $keyword)) {
       return false;
     }
     return true;
diff --git a/src/applications/maniphest/constants/ManiphestTaskStatus.php b/src/applications/maniphest/constants/ManiphestTaskStatus.php
--- a/src/applications/maniphest/constants/ManiphestTaskStatus.php
+++ b/src/applications/maniphest/constants/ManiphestTaskStatus.php
@@ -244,12 +244,12 @@
    * @task validate
    */
   public static function isValidStatusConstant($constant) {
-    if (!strlen($constant) || strlen($constant) > 64) {
+    if (!@strlen($constant) || @strlen($constant) > 64) {
       return false;
     }
 
     // Alphanumeric, but not exclusively numeric
-    if (!preg_match('/^(?![0-9]*$)[a-zA-Z0-9]+$/', $constant)) {
+    if (!@preg_match('/^(?![0-9]*$)[a-zA-Z0-9]+$/', $constant)) {
       return false;
     }
     return true;
diff --git a/src/applications/maniphest/controller/ManiphestTaskDetailController.php b/src/applications/maniphest/controller/ManiphestTaskDetailController.php
--- a/src/applications/maniphest/controller/ManiphestTaskDetailController.php
+++ b/src/applications/maniphest/controller/ManiphestTaskDetailController.php
@@ -411,7 +411,7 @@
     $section = null;
 
     $description = $task->getDescription();
-    if (strlen($description)) {
+    if (@strlen($description)) {
       $section = new PHUIPropertyListView();
       $section->addTextContent(
         phutil_tag(
diff --git a/src/applications/maniphest/mail/ManiphestTaskMailReceiver.php b/src/applications/maniphest/mail/ManiphestTaskMailReceiver.php
--- a/src/applications/maniphest/mail/ManiphestTaskMailReceiver.php
+++ b/src/applications/maniphest/mail/ManiphestTaskMailReceiver.php
@@ -12,7 +12,7 @@
   }
 
   protected function loadObject($pattern, PhabricatorUser $viewer) {
-    $id = (int)substr($pattern, 1);
+    $id = (int)@substr($pattern, 1);
 
     return id(new ManiphestTaskQuery())
       ->setViewer($viewer)
diff --git a/src/applications/maniphest/phid/ManiphestTaskPHIDType.php b/src/applications/maniphest/phid/ManiphestTaskPHIDType.php
--- a/src/applications/maniphest/phid/ManiphestTaskPHIDType.php
+++ b/src/applications/maniphest/phid/ManiphestTaskPHIDType.php
@@ -45,7 +45,7 @@
   }
 
   public function canLoadNamedObject($name) {
-    return preg_match('/^T\d*[1-9]\d*$/i', $name);
+    return @preg_match('/^T\d*[1-9]\d*$/i', $name);
   }
 
   public function loadNamedObjects(
@@ -54,7 +54,7 @@
 
     $id_map = array();
     foreach ($names as $name) {
-      $id = (int)substr($name, 1);
+      $id = (int)@substr($name, 1);
       $id_map[$id][] = $name;
     }
 
diff --git a/src/applications/maniphest/query/ManiphestTaskQuery.php b/src/applications/maniphest/query/ManiphestTaskQuery.php
--- a/src/applications/maniphest/query/ManiphestTaskQuery.php
+++ b/src/applications/maniphest/query/ManiphestTaskQuery.php
@@ -1030,13 +1030,13 @@
     // Split a "123.PHID-PROJ-abcd" cursor into a "Task ID" part and a
     // "Project PHID" part.
 
-    $parts = explode('.', $cursor, 2);
+    $parts = @explode('.', $cursor, 2);
 
     if (count($parts) < 2) {
       $parts[] = null;
     }
 
-    if (!strlen($parts[1])) {
+    if (!@strlen($parts[1])) {
       $parts[1] = null;
     }
 
diff --git a/src/applications/maniphest/xaction/ManiphestTaskOwnerTransaction.php b/src/applications/maniphest/xaction/ManiphestTaskOwnerTransaction.php
--- a/src/applications/maniphest/xaction/ManiphestTaskOwnerTransaction.php
+++ b/src/applications/maniphest/xaction/ManiphestTaskOwnerTransaction.php
@@ -112,7 +112,7 @@
     foreach ($xactions as $xaction) {
       $old = $xaction->getOldValue();
       $new = $xaction->getNewValue();
-      if (!strlen($new)) {
+      if (!@strlen($new)) {
         continue;
       }
 
diff --git a/src/applications/maniphest/xaction/ManiphestTaskPointsTransaction.php b/src/applications/maniphest/xaction/ManiphestTaskPointsTransaction.php
--- a/src/applications/maniphest/xaction/ManiphestTaskPointsTransaction.php
+++ b/src/applications/maniphest/xaction/ManiphestTaskPointsTransaction.php
@@ -77,7 +77,7 @@
 
     foreach ($xactions as $xaction) {
       $new = $xaction->getNewValue();
-      if (strlen($new) && !is_numeric($new)) {
+      if (@strlen($new) && !is_numeric($new)) {
         $errors[] = $this->newInvalidError(
           pht('Points value must be numeric or empty.'));
         continue;
@@ -98,7 +98,7 @@
   }
 
   private function getValueForPoints($value) {
-    if (!strlen($value)) {
+    if (!@strlen($value)) {
       $value = null;
     }
     if ($value !== null) {
diff --git a/src/applications/maniphest/xaction/ManiphestTaskTitleTransaction.php b/src/applications/maniphest/xaction/ManiphestTaskTitleTransaction.php
--- a/src/applications/maniphest/xaction/ManiphestTaskTitleTransaction.php
+++ b/src/applications/maniphest/xaction/ManiphestTaskTitleTransaction.php
@@ -20,7 +20,7 @@
   public function getActionName() {
     $old = $this->getOldValue();
 
-    if (!strlen($old)) {
+    if (!@strlen($old)) {
       return pht('Created');
     }
 
@@ -30,7 +30,7 @@
   public function getTitle() {
     $old = $this->getOldValue();
 
-    if (!strlen($old)) {
+    if (!@strlen($old)) {
       return pht(
         '%s created this task.',
         $this->renderAuthor());
@@ -72,7 +72,7 @@
 
     foreach ($xactions as $xaction) {
       $new = $xaction->getNewValue();
-      if (!strlen($new)) {
+      if (!@strlen($new)) {
         $errors[] = $this->newInvalidError(
           pht('Tasks must have a title.'),
           $xaction);
diff --git a/src/applications/meta/controller/PhabricatorApplicationDetailViewController.php b/src/applications/meta/controller/PhabricatorApplicationDetailViewController.php
--- a/src/applications/meta/controller/PhabricatorApplicationDetailViewController.php
+++ b/src/applications/meta/controller/PhabricatorApplicationDetailViewController.php
@@ -114,7 +114,7 @@
     }
 
     $overview = $application->getOverview();
-    if (strlen($overview)) {
+    if (@strlen($overview)) {
       $overview = new PHUIRemarkupView($viewer, $overview);
       $properties->addSectionHeader(
         pht('Overview'), PHUIPropertyListView::ICON_SUMMARY);
diff --git a/src/applications/meta/engineextension/PhabricatorDatasourceURIEngineExtension.php b/src/applications/meta/engineextension/PhabricatorDatasourceURIEngineExtension.php
--- a/src/applications/meta/engineextension/PhabricatorDatasourceURIEngineExtension.php
+++ b/src/applications/meta/engineextension/PhabricatorDatasourceURIEngineExtension.php
@@ -32,7 +32,7 @@
       // no trailing slash, there may be no path. Redirecting to the empty
       // string is considered an error by safety checks during redirection,
       // so treat this like the user entered the URI with a trailing slash.
-      if (!strlen($uri)) {
+      if (!@strlen($uri)) {
         $uri = '/';
       }
 
diff --git a/src/applications/meta/engineextension/PhabricatorSelfHyperlinkEngineExtension.php b/src/applications/meta/engineextension/PhabricatorSelfHyperlinkEngineExtension.php
--- a/src/applications/meta/engineextension/PhabricatorSelfHyperlinkEngineExtension.php
+++ b/src/applications/meta/engineextension/PhabricatorSelfHyperlinkEngineExtension.php
@@ -25,7 +25,7 @@
 
       $matches = null;
       $path = $uri->getPath();
-      if (!preg_match('(^/([^/]+)\z)', $path, $matches)) {
+      if (!@preg_match('(^/([^/]+)\z)', $path, $matches)) {
         continue;
       }
 
diff --git a/src/applications/meta/query/PhabricatorAppSearchEngine.php b/src/applications/meta/query/PhabricatorAppSearchEngine.php
--- a/src/applications/meta/query/PhabricatorAppSearchEngine.php
+++ b/src/applications/meta/query/PhabricatorAppSearchEngine.php
@@ -45,7 +45,7 @@
       ->withUnlisted(false);
 
     $name = $saved->getParameter('name');
-    if (strlen($name)) {
+    if (@strlen($name)) {
       $query->withNameContains($name);
     }
 
diff --git a/src/applications/meta/query/PhabricatorApplicationQuery.php b/src/applications/meta/query/PhabricatorApplicationQuery.php
--- a/src/applications/meta/query/PhabricatorApplicationQuery.php
+++ b/src/applications/meta/query/PhabricatorApplicationQuery.php
@@ -89,7 +89,7 @@
       }
     }
 
-    if (strlen($this->nameContains)) {
+    if (@strlen($this->nameContains)) {
       foreach ($apps as $key => $app) {
         if (stripos($app->getName(), $this->nameContains) === false) {
           unset($apps[$key]);
diff --git a/src/applications/metamta/adapter/PhabricatorMailAdapter.php b/src/applications/metamta/adapter/PhabricatorMailAdapter.php
--- a/src/applications/metamta/adapter/PhabricatorMailAdapter.php
+++ b/src/applications/metamta/adapter/PhabricatorMailAdapter.php
@@ -161,7 +161,7 @@
 
       $host = phutil_utf8_strtolower($host);
       foreach ($host_blocklist as $regexp) {
-        if (preg_match($regexp, $host)) {
+        if (@preg_match($regexp, $host)) {
           return false;
         }
       }
diff --git a/src/applications/metamta/adapter/PhabricatorMailSMTPAdapter.php b/src/applications/metamta/adapter/PhabricatorMailSMTPAdapter.php
--- a/src/applications/metamta/adapter/PhabricatorMailSMTPAdapter.php
+++ b/src/applications/metamta/adapter/PhabricatorMailSMTPAdapter.php
@@ -62,7 +62,7 @@
     $smtp->Host = $this->getOption('host');
     $smtp->Port = $this->getOption('port');
     $user = $this->getOption('user');
-    if (strlen($user)) {
+    if (@strlen($user)) {
       $smtp->SMTPAuth = true;
       $smtp->Username = $user;
       $smtp->Password = $this->getOption('password');
diff --git a/src/applications/metamta/adapter/PhabricatorMailTestAdapter.php b/src/applications/metamta/adapter/PhabricatorMailTestAdapter.php
--- a/src/applications/metamta/adapter/PhabricatorMailTestAdapter.php
+++ b/src/applications/metamta/adapter/PhabricatorMailTestAdapter.php
@@ -111,7 +111,7 @@
     $guts['ccs'] = $cc;
 
     $subject = $message->getSubject();
-    if (strlen($subject)) {
+    if (@strlen($subject)) {
       $guts['subject'] = $subject;
     }
 
@@ -126,12 +126,12 @@
     $guts['headers'] = $header_list;
 
     $text_body = $message->getTextBody();
-    if (strlen($text_body)) {
+    if (@strlen($text_body)) {
       $guts['body'] = $text_body;
     }
 
     $html_body = $message->getHTMLBody();
-    if (strlen($html_body)) {
+    if (@strlen($html_body)) {
       $guts['html-body'] = $html_body;
     }
 
diff --git a/src/applications/metamta/applicationpanel/PhabricatorMetaMTAApplicationEmailPanel.php b/src/applications/metamta/applicationpanel/PhabricatorMetaMTAApplicationEmailPanel.php
--- a/src/applications/metamta/applicationpanel/PhabricatorMetaMTAApplicationEmailPanel.php
+++ b/src/applications/metamta/applicationpanel/PhabricatorMetaMTAApplicationEmailPanel.php
@@ -50,7 +50,7 @@
     $application = $this->getApplication();
 
     $path = $request->getURIData('path');
-    if (strlen($path)) {
+    if (@strlen($path)) {
       return new Aphront404Response();
     }
 
diff --git a/src/applications/metamta/controller/PhabricatorMetaMTAMailViewController.php b/src/applications/metamta/controller/PhabricatorMetaMTAMailViewController.php
--- a/src/applications/metamta/controller/PhabricatorMetaMTAMailViewController.php
+++ b/src/applications/metamta/controller/PhabricatorMetaMTAMailViewController.php
@@ -419,7 +419,7 @@
     $properties->addProperty(pht('Message PHID'), $mail->getPHID());
 
     $details = $mail->getMessage();
-    if (!strlen($details)) {
+    if (!@strlen($details)) {
       $details = phutil_tag('em', array(), pht('None'));
     }
     $properties->addProperty(pht('Status Details'), $details);
diff --git a/src/applications/metamta/controller/PhabricatorMetaMTAMailgunReceiveController.php b/src/applications/metamta/controller/PhabricatorMetaMTAMailgunReceiveController.php
--- a/src/applications/metamta/controller/PhabricatorMetaMTAMailgunReceiveController.php
+++ b/src/applications/metamta/controller/PhabricatorMetaMTAMailgunReceiveController.php
@@ -47,7 +47,7 @@
 
     $raw_headers = $request->getStr('message-headers');
     $raw_dict = array();
-    if (strlen($raw_headers)) {
+    if (@strlen($raw_headers)) {
       $raw_headers = phutil_json_decode($raw_headers);
       foreach ($raw_headers as $raw_header) {
         list($name, $value) = $raw_header;
diff --git a/src/applications/metamta/controller/PhabricatorMetaMTASendGridReceiveController.php b/src/applications/metamta/controller/PhabricatorMetaMTASendGridReceiveController.php
--- a/src/applications/metamta/controller/PhabricatorMetaMTASendGridReceiveController.php
+++ b/src/applications/metamta/controller/PhabricatorMetaMTASendGridReceiveController.php
@@ -27,10 +27,10 @@
     $user = $request->getUser();
 
     $raw_headers = $request->getStr('headers');
-    $raw_headers = explode("\n", rtrim($raw_headers));
+    $raw_headers = @explode("\n", rtrim($raw_headers));
     $raw_dict = array();
     foreach (array_filter($raw_headers) as $header) {
-      list($name, $value) = explode(':', $header, 2);
+      list($name, $value) = @explode(':', $header, 2);
       $raw_dict[$name] = ltrim($value);
     }
 
diff --git a/src/applications/metamta/editor/PhabricatorMetaMTAApplicationEmailEditor.php b/src/applications/metamta/editor/PhabricatorMetaMTAApplicationEmailEditor.php
--- a/src/applications/metamta/editor/PhabricatorMetaMTAApplicationEmailEditor.php
+++ b/src/applications/metamta/editor/PhabricatorMetaMTAApplicationEmailEditor.php
@@ -93,7 +93,7 @@
       case PhabricatorMetaMTAApplicationEmailTransaction::TYPE_ADDRESS:
         foreach ($xactions as $xaction) {
           $email = $xaction->getNewValue();
-          if (!strlen($email)) {
+          if (!@strlen($email)) {
             // We'll deal with this below.
             continue;
           }
diff --git a/src/applications/metamta/engine/PhabricatorMailEmailEngine.php b/src/applications/metamta/engine/PhabricatorMailEmailEngine.php
--- a/src/applications/metamta/engine/PhabricatorMailEmailEngine.php
+++ b/src/applications/metamta/engine/PhabricatorMailEmailEngine.php
@@ -91,7 +91,7 @@
       $parts = array();
 
       $encrypt_uri = $mail->getMustEncryptURI();
-      if (!strlen($encrypt_uri)) {
+      if (!@strlen($encrypt_uri)) {
         $encrypt_phid = $mail->getRelatedPHID();
         if ($encrypt_phid) {
           $encrypt_uri = urisprintf(
@@ -100,7 +100,7 @@
         }
       }
 
-      if (strlen($encrypt_uri)) {
+      if (@strlen($encrypt_uri)) {
         $parts[] = pht(
           'This secure message is notifying you of a change to this object:');
         $parts[] = PhabricatorEnv::getProductionURI($encrypt_uri);
@@ -119,7 +119,7 @@
     }
 
     $body_limit = PhabricatorEnv::getEnvConfig('metamta.email-body-limit');
-    if (strlen($body) > $body_limit) {
+    if (@strlen($body) > $body_limit) {
       $body = id(new PhutilUTF8StringTruncator())
         ->setMaximumBytes($body_limit)
         ->truncateString($body);
@@ -127,7 +127,7 @@
       $body .= pht('(This email was truncated at %d bytes.)', $body_limit);
     }
     $message->setTextBody($body);
-    $body_limit -= strlen($body);
+    $body_limit -= @strlen($body);
 
     // If we sent a different message body than we were asked to, record
     // what we actually sent to make debugging and diagnostics easier.
@@ -143,13 +143,13 @@
 
     if ($send_html) {
       $html_body = $mail->getHTMLBody();
-      if (strlen($html_body)) {
+      if (@strlen($html_body)) {
         // NOTE: We just drop the entire HTML body if it won't fit. Safely
         // truncating HTML is hard, and we already have the text body to fall
         // back to.
-        if (strlen($html_body) <= $body_limit) {
+        if (@strlen($html_body) <= $body_limit) {
           $message->setHTMLBody($html_body);
-          $body_limit -= strlen($html_body);
+          $body_limit -= @strlen($html_body);
         }
       }
     }
@@ -226,7 +226,7 @@
     $mail = $this->getMail();
 
     $reply_raw = $mail->getReplyTo();
-    if (!strlen($reply_raw)) {
+    if (!@strlen($reply_raw)) {
       return null;
     }
 
@@ -240,7 +240,7 @@
     }
 
     // If we don't have a display name, fill in a default.
-    if (!strlen($reply_address->getDisplayName())) {
+    if (!@strlen($reply_address->getDisplayName())) {
       $reply_address->setDisplayName(pht('Phabricator'));
     }
 
@@ -307,13 +307,13 @@
     // a generic one.
     if ($must_encrypt) {
       $encrypt_subject = $mail->getMustEncryptSubject();
-      if (!strlen($encrypt_subject)) {
+      if (!@strlen($encrypt_subject)) {
         $encrypt_subject = pht('Object Updated');
       }
       $subject[] = $encrypt_subject;
     } else {
       $vary_prefix = $mail->getVarySubjectPrefix();
-      if (strlen($vary_prefix)) {
+      if (@strlen($vary_prefix)) {
         if ($this->shouldVarySubject()) {
           $subject[] = $vary_prefix;
         }
@@ -323,7 +323,7 @@
     }
 
     foreach ($subject as $key => $part) {
-      if (!strlen($part)) {
+      if (!@strlen($part)) {
         unset($subject[$key]);
       }
     }
@@ -403,7 +403,7 @@
     $headers = array();
 
     $thread_id = $mail->getThreadID();
-    if (!strlen($thread_id)) {
+    if (!@strlen($thread_id)) {
       return $headers;
     }
 
@@ -491,7 +491,7 @@
     $object = id(new PhutilEmailAddress())
       ->setAddress($address);
 
-    if (strlen($name)) {
+    if (@strlen($name)) {
       $object->setDisplayName($name);
     }
 
@@ -501,14 +501,14 @@
   public function newDefaultEmailAddress() {
     $raw_address = PhabricatorEnv::getEnvConfig('metamta.default-address');
 
-    if (!strlen($raw_address)) {
+    if (!@strlen($raw_address)) {
       $domain = $this->newMailDomain();
       $raw_address = "noreply@{$domain}";
     }
 
     $address = new PhutilEmailAddress($raw_address);
 
-    if (!strlen($address->getDisplayName())) {
+    if (!@strlen($address->getDisplayName())) {
       $address->setDisplayName(pht('Phabricator'));
     }
 
@@ -521,7 +521,7 @@
 
   private function newMailDomain() {
     $domain = PhabricatorEnv::getEnvConfig('metamta.reply-handler-domain');
-    if (strlen($domain)) {
+    if (@strlen($domain)) {
       return $domain;
     }
 
@@ -622,7 +622,7 @@
     // but it would be very difficult to keep track of the entire tree and this
     // gets us reasonable client behavior.
 
-    $base = substr(md5($seed), 0, 27);
+    $base = @substr(md5($seed), 0, 27);
     if (!$is_first_mail) {
       // Not totally sure, but it seems like outlook orders replies by
       // thread-index rather than timestamp, so to get these to show up in the
diff --git a/src/applications/metamta/management/PhabricatorMailManagementReceiveTestWorkflow.php b/src/applications/metamta/management/PhabricatorMailManagementReceiveTestWorkflow.php
--- a/src/applications/metamta/management/PhabricatorMailManagementReceiveTestWorkflow.php
+++ b/src/applications/metamta/management/PhabricatorMailManagementReceiveTestWorkflow.php
@@ -102,7 +102,7 @@
       'Cc' => implode(', ', $cc),
     );
 
-    if (preg_match('/.+@.+/', $to)) {
+    if (@preg_match('/.+@.+/', $to)) {
       $header_content['to'] = $to;
     } else {
 
diff --git a/src/applications/metamta/management/PhabricatorMailManagementSendTestWorkflow.php b/src/applications/metamta/management/PhabricatorMailManagementSendTestWorkflow.php
--- a/src/applications/metamta/management/PhabricatorMailManagementSendTestWorkflow.php
+++ b/src/applications/metamta/management/PhabricatorMailManagementSendTestWorkflow.php
@@ -74,7 +74,7 @@
     $viewer = $this->getViewer();
 
     $type = $args->getArg('type');
-    if (!strlen($type)) {
+    if (!@strlen($type)) {
       $type = PhabricatorMailEmailMessage::MESSAGETYPE;
     }
 
@@ -121,7 +121,7 @@
     foreach ($tos as $key => $username) {
       // If the recipient has an "@" in any noninitial position, treat this as
       // a raw email address.
-      if (preg_match('/.@/', $username)) {
+      if (@preg_match('/.@/', $username)) {
         $raw_tos[] = $username;
         unset($tos[$key]);
         continue;
diff --git a/src/applications/metamta/management/PhabricatorMailManagementShowOutboundWorkflow.php b/src/applications/metamta/management/PhabricatorMailManagementShowOutboundWorkflow.php
--- a/src/applications/metamta/management/PhabricatorMailManagementShowOutboundWorkflow.php
+++ b/src/applications/metamta/management/PhabricatorMailManagementShowOutboundWorkflow.php
@@ -65,7 +65,7 @@
     foreach ($messages as $message_key => $message) {
       if ($args->getArg('dump-html')) {
         $html_body = $message->getHTMLBody();
-        if (strlen($html_body)) {
+        if (@strlen($html_body)) {
           $template =
             "<!doctype html><html><body>{$html_body}</body></html>";
           $console->writeOut("%s\n", $html_body);
@@ -188,7 +188,7 @@
 
       $info[] = null;
       $info[] = $this->newSectionHeader(pht('TEXT BODY'));
-      if (strlen($message->getBody())) {
+      if (@strlen($message->getBody())) {
         $info[] = tsprintf('%B', $message->getBody());
       } else {
         $info[] = pht('(This message has no text body.)');
@@ -203,7 +203,7 @@
 
       $info[] = null;
       $info[] = $this->newSectionHeader(pht('HTML BODY'));
-      if (strlen($message->getHTMLBody())) {
+      if (@strlen($message->getHTMLBody())) {
         $info[] = $message->getHTMLBody();
         $info[] = null;
       } else {
diff --git a/src/applications/metamta/message/PhabricatorPhoneNumber.php b/src/applications/metamta/message/PhabricatorPhoneNumber.php
--- a/src/applications/metamta/message/PhabricatorPhoneNumber.php
+++ b/src/applications/metamta/message/PhabricatorPhoneNumber.php
@@ -8,7 +8,7 @@
   public function __construct($raw_number) {
     $number = preg_replace('/[^\d]+/', '', $raw_number);
 
-    if (!preg_match('/^[1-9]\d{9,14}\z/', $number)) {
+    if (!@preg_match('/^[1-9]\d{9,14}\z/', $number)) {
       throw new Exception(
         pht(
           'Phone number ("%s") is not in a recognized format: expected a '.
@@ -19,8 +19,8 @@
 
     // If the number didn't start with "+" and has has 10 digits, assume it is
     // a US number with no country code prefix, like "(555) 555-5555".
-    if (!preg_match('/^[+]/', $raw_number)) {
-      if (strlen($number) === 10) {
+    if (!@preg_match('/^[+]/', $raw_number)) {
+      if (@strlen($number) === 10) {
         $number = '1'.$number;
       }
     }
diff --git a/src/applications/metamta/parser/PhabricatorMetaMTAEmailBodyParser.php b/src/applications/metamta/parser/PhabricatorMetaMTAEmailBodyParser.php
--- a/src/applications/metamta/parser/PhabricatorMetaMTAEmailBodyParser.php
+++ b/src/applications/metamta/parser/PhabricatorMetaMTAEmailBodyParser.php
@@ -55,13 +55,13 @@
     $saw_command = false;
     $commands = array();
     foreach ($lines as $key => $line) {
-      if (!strlen(trim($line)) && $saw_command) {
+      if (!@strlen(trim($line)) && $saw_command) {
         unset($lines[$key]);
         continue;
       }
 
       $matches = null;
-      if (!preg_match('/^\s*!(\w+.*$)/', $line, $matches)) {
+      if (!@preg_match('/^\s*!(\w+.*$)/', $line, $matches)) {
         break;
       }
 
@@ -93,11 +93,11 @@
     $start = null;
     $lines = phutil_split_lines($body);
     foreach ($lines as $key => $line) {
-      if (preg_match('/^\s*>?\s*On\b/', $line)) {
+      if (@preg_match('/^\s*>?\s*On\b/', $line)) {
         $start = $key;
       }
       if ($start !== null) {
-        if (preg_match('/\bwrote:/', $line)) {
+        if (@preg_match('/\bwrote:/', $line)) {
           $lines = array_slice($lines, 0, $start);
           $body = implode('', $lines);
           break;
diff --git a/src/applications/metamta/query/PhabricatorMetaMTAActorQuery.php b/src/applications/metamta/query/PhabricatorMetaMTAActorQuery.php
--- a/src/applications/metamta/query/PhabricatorMetaMTAActorQuery.php
+++ b/src/applications/metamta/query/PhabricatorMetaMTAActorQuery.php
@@ -111,7 +111,7 @@
         $name = $user->getUserName();
         break;
       case 'real':
-        $name = strlen($user->getRealName()) ?
+        $name = @strlen($user->getRealName()) ?
           $user->getRealName() : $user->getUserName();
         break;
       case 'full':
diff --git a/src/applications/metamta/receiver/PhabricatorObjectMailReceiver.php b/src/applications/metamta/receiver/PhabricatorObjectMailReceiver.php
--- a/src/applications/metamta/receiver/PhabricatorObjectMailReceiver.php
+++ b/src/applications/metamta/receiver/PhabricatorObjectMailReceiver.php
@@ -158,7 +158,7 @@
 
     $regexp = $this->getAddressRegexp();
     $matches = null;
-    if (!preg_match($regexp, $local, $matches)) {
+    if (!@preg_match($regexp, $local, $matches)) {
       return false;
     }
 
@@ -184,7 +184,7 @@
     $hash = PhabricatorHash::digestWithNamedKey(
       $mail_key.$phid,
       'mail.object-address-key');
-    return substr($hash, 0, 16);
+    return @substr($hash, 0, 16);
   }
 
 }
diff --git a/src/applications/metamta/replyhandler/PhabricatorMailTarget.php b/src/applications/metamta/replyhandler/PhabricatorMailTarget.php
--- a/src/applications/metamta/replyhandler/PhabricatorMailTarget.php
+++ b/src/applications/metamta/replyhandler/PhabricatorMailTarget.php
@@ -62,7 +62,7 @@
 
     $body = $mail->getBody();
     $html_body = $mail->getHTMLBody();
-    $has_html = (strlen($html_body) > 0);
+    $has_html = (@strlen($html_body) > 0);
 
     if ($show_stamps) {
       $stamps = $mail->getMailStamps();
diff --git a/src/applications/metamta/storage/PhabricatorMetaMTAReceivedMail.php b/src/applications/metamta/storage/PhabricatorMetaMTAReceivedMail.php
--- a/src/applications/metamta/storage/PhabricatorMetaMTAReceivedMail.php
+++ b/src/applications/metamta/storage/PhabricatorMetaMTAReceivedMail.php
@@ -63,7 +63,7 @@
   }
 
   private function normalizeMailHeaderName($name) {
-    return strtolower($name);
+    return @strtolower($name);
   }
 
   public function getMessageID() {
@@ -339,7 +339,7 @@
    */
   private function getRawEmailAddress($address) {
     $matches = null;
-    $ok = preg_match('/<(.*)>/', $address, $matches);
+    $ok = @preg_match('/<(.*)>/', $address, $matches);
     if ($ok) {
       $address = $matches[1];
     }
@@ -348,7 +348,7 @@
 
   private function getRawEmailAddresses($addresses) {
     $raw_addresses = array();
-    foreach (explode(',', $addresses) as $address) {
+    foreach (@explode(',', $addresses) as $address) {
       $raw_addresses[] = $this->getRawEmailAddress($address);
     }
     return array_filter($raw_addresses);
@@ -416,7 +416,7 @@
     $body = $this->getCleanTextBody();
     $attachments = $this->getAttachments();
 
-    if (strlen($body) || $attachments) {
+    if (@strlen($body) || $attachments) {
       return;
     }
 
@@ -522,7 +522,7 @@
   public function newFromAddress() {
     $raw_from = $this->getHeader('From');
 
-    if (strlen($raw_from)) {
+    if (@strlen($raw_from)) {
       return new PhutilEmailAddress($raw_from);
     }
 
diff --git a/src/applications/metamta/storage/__tests__/PhabricatorMetaMTAMailTestCase.php b/src/applications/metamta/storage/__tests__/PhabricatorMetaMTAMailTestCase.php
--- a/src/applications/metamta/storage/__tests__/PhabricatorMetaMTAMailTestCase.php
+++ b/src/applications/metamta/storage/__tests__/PhabricatorMetaMTAMailTestCase.php
@@ -389,13 +389,13 @@
 
     // We expect the body was truncated, because it exceeded the body limit.
     $this->assertTrue(
-      (strlen($text_body) < strlen($string_1mb)),
+      (@strlen($text_body) < @strlen($string_1mb)),
       pht('Text Body Truncated'));
 
     // We expect the HTML body was dropped completely after the text body was
     // truncated.
     $this->assertTrue(
-      !strlen($html_body),
+      !@strlen($html_body),
       pht('HTML Body Removed'));
 
 
@@ -416,7 +416,7 @@
     $html_body = $mailer->getHTMLBody();
 
     $this->assertEqual($string_1kb, $text_body);
-    $this->assertTrue(!strlen($html_body));
+    $this->assertTrue(!@strlen($html_body));
   }
 
 }
diff --git a/src/applications/metamta/util/PhabricatorMailUtil.php b/src/applications/metamta/util/PhabricatorMailUtil.php
--- a/src/applications/metamta/util/PhabricatorMailUtil.php
+++ b/src/applications/metamta/util/PhabricatorMailUtil.php
@@ -21,14 +21,14 @@
     // If a mailbox prefix is configured and present, strip it off.
     $prefix_key = 'metamta.single-reply-handler-prefix';
     $prefix = PhabricatorEnv::getEnvConfig($prefix_key);
-    $len = strlen($prefix);
+    $len = @strlen($prefix);
 
     if ($len) {
       $prefix = $prefix.'+';
       $len = $len + 1;
 
       if (!strncasecmp($raw_address, $prefix, $len)) {
-        $raw_address = substr($raw_address, $len);
+        $raw_address = @substr($raw_address, $len);
       }
     }
 
diff --git a/src/applications/metamta/view/PhabricatorMetaMTAMailBody.php b/src/applications/metamta/view/PhabricatorMetaMTAMailBody.php
--- a/src/applications/metamta/view/PhabricatorMetaMTAMailBody.php
+++ b/src/applications/metamta/view/PhabricatorMetaMTAMailBody.php
@@ -45,7 +45,7 @@
    * @task compose
    */
   public function addRawSection($text) {
-    if (strlen($text)) {
+    if (@strlen($text)) {
       $text = rtrim($text);
       $this->sections[] = $text;
       $this->htmlSections[] = phutil_escape_html_newlines(
@@ -81,7 +81,7 @@
   }
 
   public function addRawPlaintextSection($text) {
-    if (strlen($text)) {
+    if (@strlen($text)) {
       $text = rtrim($text);
       $this->sections[] = $text;
     }
diff --git a/src/applications/multimeter/controller/MultimeterSampleController.php b/src/applications/multimeter/controller/MultimeterSampleController.php
--- a/src/applications/multimeter/controller/MultimeterSampleController.php
+++ b/src/applications/multimeter/controller/MultimeterSampleController.php
@@ -10,7 +10,7 @@
     $viewer = $this->getViewer();
     $group_map = $this->getColumnMap();
 
-    $group = explode('.', $request->getStr('group'));
+    $group = @explode('.', $request->getStr('group'));
     $group = array_intersect($group, array_keys($group_map));
     $group = array_fuse($group);
 
@@ -299,7 +299,7 @@
     $uri = clone $this->getRequest()->getRequestURI();
 
     $group = implode('.', $group);
-    if (!strlen($group)) {
+    if (!@strlen($group)) {
       $uri->removeQueryParam('group');
     } else {
       $uri->replaceQueryParam('group', $group);
@@ -342,7 +342,7 @@
 
   private function getEventViewerPHID($viewer_name) {
     if (!strncmp($viewer_name, 'user.', 5)) {
-      return substr($viewer_name, 5);
+      return @substr($viewer_name, 5);
     }
     return null;
   }
diff --git a/src/applications/notification/client/PhabricatorNotificationServerRef.php b/src/applications/notification/client/PhabricatorNotificationServerRef.php
--- a/src/applications/notification/client/PhabricatorNotificationServerRef.php
+++ b/src/applications/notification/client/PhabricatorNotificationServerRef.php
@@ -152,7 +152,7 @@
       ->setPath($full_path);
 
     $instance = PhabricatorEnv::getEnvConfig('cluster.instance');
-    if (strlen($instance)) {
+    if (@strlen($instance)) {
       $uri->replaceQueryParam('instance', $instance);
     }
 
@@ -161,7 +161,7 @@
 
   public function getWebsocketURI($to_path = null) {
     $instance = PhabricatorEnv::getEnvConfig('cluster.instance');
-    if (strlen($instance)) {
+    if (@strlen($instance)) {
       $to_path = $to_path.'~'.$instance.'/';
     }
 
diff --git a/src/applications/notification/config/PhabricatorNotificationServersConfigType.php b/src/applications/notification/config/PhabricatorNotificationServersConfigType.php
--- a/src/applications/notification/config/PhabricatorNotificationServersConfigType.php
+++ b/src/applications/notification/config/PhabricatorNotificationServersConfigType.php
@@ -92,7 +92,7 @@
       }
 
       $path = idx($spec, 'path');
-      if ($type == 'admin' && strlen($path)) {
+      if ($type == 'admin' && @strlen($path)) {
         throw $this->newException(
           pht(
             'Notification server configuration describes an invalid host '.
diff --git a/src/applications/nuance/cursor/NuanceGitHubImportCursor.php b/src/applications/nuance/cursor/NuanceGitHubImportCursor.php
--- a/src/applications/nuance/cursor/NuanceGitHubImportCursor.php
+++ b/src/applications/nuance/cursor/NuanceGitHubImportCursor.php
@@ -204,7 +204,7 @@
     $now = PhabricatorTime::getNow();
 
     $limit_ttl = null;
-    if (strlen($remaining)) {
+    if (@strlen($remaining)) {
       $remaining = (int)$remaining;
       if (!$remaining) {
         $limit_ttl = (int)$limit_reset;
diff --git a/src/applications/nuance/github/NuanceGitHubRawEvent.php b/src/applications/nuance/github/NuanceGitHubRawEvent.php
--- a/src/applications/nuance/github/NuanceGitHubRawEvent.php
+++ b/src/applications/nuance/github/NuanceGitHubRawEvent.php
@@ -164,7 +164,7 @@
     $raw = $this->raw;
 
     $full = idxv($raw, array('repo', 'name'));
-    if (strlen($full)) {
+    if (@strlen($full)) {
       return $full;
     }
 
@@ -172,7 +172,7 @@
     // response body. Parse it out of the URI.
 
     $matches = null;
-    $ok = preg_match(
+    $ok = @preg_match(
       '(/repos/((?:[^/]+)/(?:[^/]+))/issues/events/)',
       idx($raw, 'url'),
       $matches);
@@ -269,8 +269,8 @@
           break;
         case 'PushEvent':
           $ref = idxv($raw, array('payload', 'ref'));
-          if (preg_match('(^refs/heads/)', $ref)) {
-            return pht('Branch %s', substr($ref, strlen('refs/heads/')));
+          if (@preg_match('(^refs/heads/)', $ref)) {
+            return pht('Branch %s', @substr($ref, @strlen('refs/heads/')));
           } else {
             return pht('Ref %s', $ref);
           }
@@ -348,7 +348,7 @@
         return pht('Created');
       case 'PushEvent':
         $head = idxv($raw, array('payload', 'head'));
-        $head = substr($head, 0, 12);
+        $head = @substr($head, 0, 12);
         return pht('Pushed: %s', $head);
       case 'IssuesEvent':
         $action = idxv($raw, array('payload', 'action'));
diff --git a/src/applications/nuance/item/NuanceGitHubEventItemType.php b/src/applications/nuance/item/NuanceGitHubEventItemType.php
--- a/src/applications/nuance/item/NuanceGitHubEventItemType.php
+++ b/src/applications/nuance/item/NuanceGitHubEventItemType.php
@@ -69,7 +69,7 @@
     $raw = $this->newRawEvent($item);
 
     $full_repository = $raw->getRepositoryFullName();
-    if (!strlen($full_repository)) {
+    if (!@strlen($full_repository)) {
       return null;
     }
 
@@ -386,7 +386,7 @@
         ->setBridgedObjectPHID($xobj_phid);
 
       $title = $xobj->getProperty('task.title');
-      if (!strlen($title)) {
+      if (!@strlen($title)) {
         $title = pht('Nuance Item %d Task', $item->getID());
       }
 
@@ -413,7 +413,7 @@
 
     $event = $this->newRawEvent($item);
     $comment = $event->getComment();
-    if (strlen($comment)) {
+    if (@strlen($comment)) {
       $xactions[] = id(new ManiphestTransaction())
         ->setTransactionType(PhabricatorTransactions::TYPE_COMMENT)
         ->attachComment(
diff --git a/src/applications/nuance/management/NuanceManagementImportWorkflow.php b/src/applications/nuance/management/NuanceManagementImportWorkflow.php
--- a/src/applications/nuance/management/NuanceManagementImportWorkflow.php
+++ b/src/applications/nuance/management/NuanceManagementImportWorkflow.php
@@ -46,7 +46,7 @@
     }
 
     $select = $args->getArg('cursor');
-    if (strlen($select)) {
+    if (@strlen($select)) {
       if (empty($cursors[$select])) {
         throw new PhutilArgumentUsageException(
           pht(
diff --git a/src/applications/nuance/management/NuanceManagementWorkflow.php b/src/applications/nuance/management/NuanceManagementWorkflow.php
--- a/src/applications/nuance/management/NuanceManagementWorkflow.php
+++ b/src/applications/nuance/management/NuanceManagementWorkflow.php
@@ -5,7 +5,7 @@
 
   protected function loadSource(PhutilArgumentParser $argv, $key) {
     $source = $argv->getArg($key);
-    if (!strlen($source)) {
+    if (!@strlen($source)) {
       throw new PhutilArgumentUsageException(
         pht(
           'Specify a source with %s.',
@@ -66,7 +66,7 @@
 
   protected function loadITem(PhutilArgumentParser $argv, $key) {
     $item = $argv->getArg($key);
-    if (!strlen($item)) {
+    if (!@strlen($item)) {
       throw new PhutilArgumentUsageException(
         pht(
           'Specify a item with %s.',
diff --git a/src/applications/nuance/source/NuanceSourceDefinition.php b/src/applications/nuance/source/NuanceSourceDefinition.php
--- a/src/applications/nuance/source/NuanceSourceDefinition.php
+++ b/src/applications/nuance/source/NuanceSourceDefinition.php
@@ -77,7 +77,7 @@
       }
 
       $key = $cursor->getCursorKey();
-      if (!strlen($key)) {
+      if (!@strlen($key)) {
         throw new Exception(
           pht(
             'Source "%s" (of class "%s") returned an import cursor with '.
diff --git a/src/applications/nuance/xaction/NuanceQueueNameTransaction.php b/src/applications/nuance/xaction/NuanceQueueNameTransaction.php
--- a/src/applications/nuance/xaction/NuanceQueueNameTransaction.php
+++ b/src/applications/nuance/xaction/NuanceQueueNameTransaction.php
@@ -32,7 +32,7 @@
     $max_length = $object->getColumnMaximumByteLength('name');
     foreach ($xactions as $xaction) {
       $new_value = $xaction->getNewValue();
-      $new_length = strlen($new_value);
+      $new_length = @strlen($new_value);
       if ($new_length > $max_length) {
         $errors[] = $this->newInvalidError(
           pht(
diff --git a/src/applications/nuance/xaction/NuanceSourceNameTransaction.php b/src/applications/nuance/xaction/NuanceSourceNameTransaction.php
--- a/src/applications/nuance/xaction/NuanceSourceNameTransaction.php
+++ b/src/applications/nuance/xaction/NuanceSourceNameTransaction.php
@@ -32,7 +32,7 @@
     $max_length = $object->getColumnMaximumByteLength('name');
     foreach ($xactions as $xaction) {
       $new_value = $xaction->getNewValue();
-      $new_length = strlen($new_value);
+      $new_length = @strlen($new_value);
       if ($new_length > $max_length) {
         $errors[] = $this->newInvalidError(
           pht(
diff --git a/src/applications/oauthserver/PhabricatorOAuthServer.php b/src/applications/oauthserver/PhabricatorOAuthServer.php
--- a/src/applications/oauthserver/PhabricatorOAuthServer.php
+++ b/src/applications/oauthserver/PhabricatorOAuthServer.php
@@ -201,7 +201,7 @@
     $uri = new PhutilURI($raw_uri);
 
     $fragment = $uri->getFragment();
-    if (strlen($fragment)) {
+    if (@strlen($fragment)) {
       throw new Exception(
         pht(
           'OAuth application redirect URIs must not contain URI '.
@@ -272,8 +272,8 @@
     // defuses an attack where a third party with control over the network
     // tricks you into using HTTP to authenticate over a link which is supposed
     // to be HTTPS only and sniffs all your token cookies.
-    if (strtolower($primary_uri->getProtocol()) == 'https') {
-      if (strtolower($secondary_uri->getProtocol()) != 'https') {
+    if (@strtolower($primary_uri->getProtocol()) == 'https') {
+      if (@strtolower($secondary_uri->getProtocol()) != 'https') {
         return false;
       }
     }
diff --git a/src/applications/oauthserver/controller/PhabricatorOAuthServerAuthController.php b/src/applications/oauthserver/controller/PhabricatorOAuthServerAuthController.php
--- a/src/applications/oauthserver/controller/PhabricatorOAuthServerAuthController.php
+++ b/src/applications/oauthserver/controller/PhabricatorOAuthServerAuthController.php
@@ -305,7 +305,7 @@
     $full_uri = clone $uri;
 
     foreach ($params as $key => $value) {
-      if (strlen($value)) {
+      if (@strlen($value)) {
         $full_uri->replaceQueryParam($key, $value);
       }
     }
diff --git a/src/applications/oauthserver/controller/PhabricatorOAuthServerTokenController.php b/src/applications/oauthserver/controller/PhabricatorOAuthServerTokenController.php
--- a/src/applications/oauthserver/controller/PhabricatorOAuthServerTokenController.php
+++ b/src/applications/oauthserver/controller/PhabricatorOAuthServerTokenController.php
@@ -23,7 +23,7 @@
 
     $client_id_parameter = $request->getStr('client_id');
     $client_id_header = idx($_SERVER, 'PHP_AUTH_USER');
-    if (strlen($client_id_parameter) && strlen($client_id_header)) {
+    if (@strlen($client_id_parameter) && @strlen($client_id_header)) {
       if ($client_id_parameter !== $client_id_header) {
         throw new Exception(
           pht(
@@ -37,7 +37,7 @@
 
     $client_secret_parameter = $request->getStr('client_secret');
     $client_secret_header = idx($_SERVER, 'PHP_AUTH_PW');
-    if (strlen($client_secret_parameter)) {
+    if (@strlen($client_secret_parameter)) {
       // If the `client_secret` parameter is present, prefer parameters.
       $client_phid = $client_id_parameter;
       $client_secret = $client_secret_parameter;
diff --git a/src/applications/owners/controller/PhabricatorOwnersDetailController.php b/src/applications/owners/controller/PhabricatorOwnersDetailController.php
--- a/src/applications/owners/controller/PhabricatorOwnersDetailController.php
+++ b/src/applications/owners/controller/PhabricatorOwnersDetailController.php
@@ -217,7 +217,7 @@
     $view->addProperty(pht('Ignored Attributes'), $ignored);
 
     $description = $package->getDescription();
-    if (strlen($description)) {
+    if (@strlen($description)) {
       $description = new PHUIRemarkupView($viewer, $description);
       $view->addSectionHeader(pht('Description'));
       $view->addTextContent($description);
diff --git a/src/applications/owners/controller/PhabricatorOwnersPathsController.php b/src/applications/owners/controller/PhabricatorOwnersPathsController.php
--- a/src/applications/owners/controller/PhabricatorOwnersPathsController.php
+++ b/src/applications/owners/controller/PhabricatorOwnersPathsController.php
@@ -27,7 +27,7 @@
 
       $path_refs = array();
       foreach ($paths as $key => $path) {
-        if (!isset($repos[$key]) || !strlen($repos[$key])) {
+        if (!isset($repos[$key]) || !@strlen($repos[$key])) {
           throw new Exception(
             pht(
               'No repository PHID for path "%s"!',
diff --git a/src/applications/owners/engineextension/PhabricatorOwnersHovercardEngineExtension.php b/src/applications/owners/engineextension/PhabricatorOwnersHovercardEngineExtension.php
--- a/src/applications/owners/engineextension/PhabricatorOwnersHovercardEngineExtension.php
+++ b/src/applications/owners/engineextension/PhabricatorOwnersHovercardEngineExtension.php
@@ -76,7 +76,7 @@
       $viewer->renderHandleList($owner_phids)->setAsInline(true));
 
     $description = $package->getDescription();
-    if (strlen($description)) {
+    if (@strlen($description)) {
       $description = id(new PhutilUTF8StringTruncator())
         ->setMaximumGlyphs(120)
         ->truncateString($description);
diff --git a/src/applications/owners/lipsum/PhabricatorOwnersPackageTestDataGenerator.php b/src/applications/owners/lipsum/PhabricatorOwnersPackageTestDataGenerator.php
--- a/src/applications/owners/lipsum/PhabricatorOwnersPackageTestDataGenerator.php
+++ b/src/applications/owners/lipsum/PhabricatorOwnersPackageTestDataGenerator.php
@@ -52,7 +52,7 @@
 
     $paths = id(new PhabricatorOwnersPathContextFreeGrammar())
       ->generateSeveral($path_count, "\n");
-    $paths = explode("\n", $paths);
+    $paths = @explode("\n", $paths);
     $paths = array_unique($paths);
 
     $repository_phid = $this->loadOneRandom('PhabricatorRepository')
diff --git a/src/applications/owners/phid/PhabricatorOwnersPackagePHIDType.php b/src/applications/owners/phid/PhabricatorOwnersPackagePHIDType.php
--- a/src/applications/owners/phid/PhabricatorOwnersPackagePHIDType.php
+++ b/src/applications/owners/phid/PhabricatorOwnersPackagePHIDType.php
@@ -55,7 +55,7 @@
   }
 
   public function canLoadNamedObject($name) {
-    return preg_match('/^O\d*[1-9]\d*$/i', $name);
+    return @preg_match('/^O\d*[1-9]\d*$/i', $name);
   }
 
   public function loadNamedObjects(
@@ -64,7 +64,7 @@
 
     $id_map = array();
     foreach ($names as $name) {
-      $id = (int)substr($name, 1);
+      $id = (int)@substr($name, 1);
       $id_map[$id][] = $name;
     }
 
diff --git a/src/applications/owners/query/PhabricatorOwnersPackageSearchEngine.php b/src/applications/owners/query/PhabricatorOwnersPackageSearchEngine.php
--- a/src/applications/owners/query/PhabricatorOwnersPackageSearchEngine.php
+++ b/src/applications/owners/query/PhabricatorOwnersPackageSearchEngine.php
@@ -73,7 +73,7 @@
       $query->withStatuses($map['statuses']);
     }
 
-    if (strlen($map['name'])) {
+    if (@strlen($map['name'])) {
       $query->withNameNgrams($map['name']);
     }
 
diff --git a/src/applications/owners/storage/PhabricatorOwnersPackage.php b/src/applications/owners/storage/PhabricatorOwnersPackage.php
--- a/src/applications/owners/storage/PhabricatorOwnersPackage.php
+++ b/src/applications/owners/storage/PhabricatorOwnersPackage.php
@@ -364,7 +364,7 @@
     foreach ($rows as $row) {
       $id = $row['id'];
       $path = $row['path'];
-      $length = strlen($path);
+      $length = @strlen($path);
       $excluded = $row['excluded'];
 
       if ($row['dominion'] === self::DOMINION_WEAK) {
@@ -485,10 +485,10 @@
       '/',
     );
 
-    $parts = explode('/', $path);
+    $parts = @explode('/', $path);
     $buffer = '/';
     foreach ($parts as $part) {
-      if (!strlen($part)) {
+      if (!@strlen($part)) {
         continue;
       }
 
diff --git a/src/applications/owners/storage/__tests__/PhabricatorOwnersPackageTestCase.php b/src/applications/owners/storage/__tests__/PhabricatorOwnersPackageTestCase.php
--- a/src/applications/owners/storage/__tests__/PhabricatorOwnersPackageTestCase.php
+++ b/src/applications/owners/storage/__tests__/PhabricatorOwnersPackageTestCase.php
@@ -30,8 +30,8 @@
     );
     $this->assertEqual(
       array(
-        1 => strlen('src/'),
-        2 => strlen('src/releeph/'),
+        1 => @strlen('src/'),
+        2 => @strlen('src/releeph/'),
       ),
       PhabricatorOwnersPackage::findLongestPathsPerPackage($rows, $paths));
 
@@ -41,7 +41,7 @@
     );
     $this->assertEqual(
       array(
-        2 => strlen('src/releeph/'),
+        2 => @strlen('src/releeph/'),
       ),
       PhabricatorOwnersPackage::findLongestPathsPerPackage($rows, $paths));
 
@@ -75,7 +75,7 @@
 
     $this->assertEqual(
       array(
-        2 => strlen('src/applications/'),
+        2 => @strlen('src/applications/'),
       ),
       PhabricatorOwnersPackage::findLongestPathsPerPackage($rows, $paths));
 
@@ -95,7 +95,7 @@
 
     $this->assertEqual(
       array(
-        1 => strlen('src/applications/main/'),
+        1 => @strlen('src/applications/main/'),
       ),
       PhabricatorOwnersPackage::findLongestPathsPerPackage($rows, $paths));
 
@@ -177,7 +177,7 @@
         $expect = $weak;
       }
 
-      $expect = array_fill_keys($expect, strlen($main_c));
+      $expect = array_fill_keys($expect, @strlen($main_c));
       $actual = PhabricatorOwnersPackage::findLongestPathsPerPackage(
         $rows,
         $paths);
diff --git a/src/applications/owners/typeahead/PhabricatorOwnersPackageDatasource.php b/src/applications/owners/typeahead/PhabricatorOwnersPackageDatasource.php
--- a/src/applications/owners/typeahead/PhabricatorOwnersPackageDatasource.php
+++ b/src/applications/owners/typeahead/PhabricatorOwnersPackageDatasource.php
@@ -26,7 +26,7 @@
 
     // If the user is querying by monogram explicitly, like "O123", do an ID
     // search. Otherwise, do an ngram substring search.
-    if (preg_match('/^[oO]\d+\z/', $raw_query)) {
+    if (@preg_match('/^[oO]\d+\z/', $raw_query)) {
       $id = trim($raw_query, 'oO');
       $id = (int)$id;
       $query->withIDs(array($id));
diff --git a/src/applications/owners/xaction/PhabricatorOwnersPackageNameTransaction.php b/src/applications/owners/xaction/PhabricatorOwnersPackageNameTransaction.php
--- a/src/applications/owners/xaction/PhabricatorOwnersPackageNameTransaction.php
+++ b/src/applications/owners/xaction/PhabricatorOwnersPackageNameTransaction.php
@@ -24,7 +24,7 @@
 
     foreach ($xactions as $xaction) {
       $new = $xaction->getNewValue();
-      if (preg_match('([,!])', $new)) {
+      if (@preg_match('([,!])', $new)) {
         $errors[] = $this->newInvalidError(
           pht(
             'Package names may not contain commas (",") or exclamation '.
diff --git a/src/applications/packages/query/PhabricatorPackagesQuery.php b/src/applications/packages/query/PhabricatorPackagesQuery.php
--- a/src/applications/packages/query/PhabricatorPackagesQuery.php
+++ b/src/applications/packages/query/PhabricatorPackagesQuery.php
@@ -13,7 +13,7 @@
 
     $parts = array();
     foreach ($full_keys as $full_key) {
-      $key_parts = explode('/', $full_key, 2);
+      $key_parts = @explode('/', $full_key, 2);
 
       if (count($key_parts) != 2) {
         continue;
diff --git a/src/applications/packages/storage/PhabricatorPackagesPackage.php b/src/applications/packages/storage/PhabricatorPackagesPackage.php
--- a/src/applications/packages/storage/PhabricatorPackagesPackage.php
+++ b/src/applications/packages/storage/PhabricatorPackagesPackage.php
@@ -79,7 +79,7 @@
   }
 
   public static function assertValidPackageName($value) {
-    $length = phutil_utf8_strlen($value);
+    $length = phutil_utf8strlen($value);
     if (!$length) {
       throw new Exception(
         pht(
@@ -99,7 +99,7 @@
   }
 
   public static function assertValidPackageKey($value) {
-    $length = phutil_utf8_strlen($value);
+    $length = phutil_utf8strlen($value);
     if (!$length) {
       throw new Exception(
         pht(
@@ -117,7 +117,7 @@
           new PhutilNumber($max_length)));
     }
 
-    if (!preg_match('/^[a-z]+\z/', $value)) {
+    if (!@preg_match('/^[a-z]+\z/', $value)) {
       throw new Exception(
         pht(
           'Package key "%s" is not valid: package keys may only contain '.
diff --git a/src/applications/packages/storage/PhabricatorPackagesPublisher.php b/src/applications/packages/storage/PhabricatorPackagesPublisher.php
--- a/src/applications/packages/storage/PhabricatorPackagesPublisher.php
+++ b/src/applications/packages/storage/PhabricatorPackagesPublisher.php
@@ -55,7 +55,7 @@
   }
 
   public static function assertValidPublisherName($value) {
-    $length = phutil_utf8_strlen($value);
+    $length = phutil_utf8strlen($value);
     if (!$length) {
       throw new Exception(
         pht(
@@ -75,7 +75,7 @@
   }
 
   public static function assertValidPublisherKey($value) {
-    $length = phutil_utf8_strlen($value);
+    $length = phutil_utf8strlen($value);
     if (!$length) {
       throw new Exception(
         pht(
@@ -93,7 +93,7 @@
           new PhutilNumber($max_length)));
     }
 
-    if (!preg_match('/^[a-z]+\z/', $value)) {
+    if (!@preg_match('/^[a-z]+\z/', $value)) {
       throw new Exception(
         pht(
           'Publisher key "%s" is not valid: publisher keys may only contain '.
diff --git a/src/applications/packages/storage/PhabricatorPackagesVersion.php b/src/applications/packages/storage/PhabricatorPackagesVersion.php
--- a/src/applications/packages/storage/PhabricatorPackagesVersion.php
+++ b/src/applications/packages/storage/PhabricatorPackagesVersion.php
@@ -59,7 +59,7 @@
   }
 
   public static function assertValidVersionName($value) {
-    $length = phutil_utf8_strlen($value);
+    $length = phutil_utf8strlen($value);
     if (!$length) {
       throw new Exception(
         pht(
@@ -77,7 +77,7 @@
           new PhutilNumber($max_length)));
     }
 
-    if (!preg_match('/^[A-Za-z0-9.-]+\z/', $value)) {
+    if (!@preg_match('/^[A-Za-z0-9.-]+\z/', $value)) {
       throw new Exception(
         pht(
           'Version name "%s" is not valid: version names may only contain '.
@@ -85,7 +85,7 @@
           $value));
     }
 
-    if (preg_match('/^[.-]|[.-]$/', $value)) {
+    if (@preg_match('/^[.-]|[.-]$/', $value)) {
       throw new Exception(
         pht(
           'Version name "%s" is not valid: version names may not start or '.
diff --git a/src/applications/passphrase/controller/PassphraseCredentialEditController.php b/src/applications/passphrase/controller/PassphraseCredentialEditController.php
--- a/src/applications/passphrase/controller/PassphraseCredentialEditController.php
+++ b/src/applications/passphrase/controller/PassphraseCredentialEditController.php
@@ -98,7 +98,7 @@
       $env_secret = new PhutilOpaqueEnvelope($v_secret);
       $env_password = new PhutilOpaqueEnvelope($v_password);
 
-      $has_secret = !preg_match('/^('.$bullet.')+$/', trim($v_decrypt));
+      $has_secret = !@preg_match('/^('.$bullet.')+$/', trim($v_decrypt));
 
       // Validate and repair SSH private keys, and apply passwords if they
       // are provided. See T13454 for discussion.
@@ -112,7 +112,7 @@
       if ($is_ssh && $has_secret) {
         $old_object = PhabricatorAuthSSHPrivateKey::newFromRawKey($env_secret);
 
-        if (strlen($v_password)) {
+        if (@strlen($v_password)) {
           $old_object->setPassphrase($env_password);
         }
 
diff --git a/src/applications/passphrase/controller/PassphraseCredentialRevealController.php b/src/applications/passphrase/controller/PassphraseCredentialRevealController.php
--- a/src/applications/passphrase/controller/PassphraseCredentialRevealController.php
+++ b/src/applications/passphrase/controller/PassphraseCredentialRevealController.php
@@ -39,7 +39,7 @@
       $secret = $credential->getSecret();
       if (!$secret) {
         $body = pht('This credential has no associated secret.');
-      } else if (!strlen($secret->openEnvelope())) {
+      } else if (!@strlen($secret->openEnvelope())) {
         $body = pht('This credential has an empty secret.');
       } else {
         $body = id(new PHUIFormLayoutView())
diff --git a/src/applications/passphrase/controller/PassphraseCredentialViewController.php b/src/applications/passphrase/controller/PassphraseCredentialViewController.php
--- a/src/applications/passphrase/controller/PassphraseCredentialViewController.php
+++ b/src/applications/passphrase/controller/PassphraseCredentialViewController.php
@@ -196,7 +196,7 @@
     }
 
     $description = $credential->getDescription();
-    if (strlen($description)) {
+    if (@strlen($description)) {
       $properties->addSectionHeader(
         pht('Description'),
         PHUIPropertyListView::ICON_SUMMARY);
diff --git a/src/applications/passphrase/phid/PassphraseCredentialPHIDType.php b/src/applications/passphrase/phid/PassphraseCredentialPHIDType.php
--- a/src/applications/passphrase/phid/PassphraseCredentialPHIDType.php
+++ b/src/applications/passphrase/phid/PassphraseCredentialPHIDType.php
@@ -45,7 +45,7 @@
   }
 
   public function canLoadNamedObject($name) {
-    return preg_match('/^K\d*[1-9]\d*$/i', $name);
+    return @preg_match('/^K\d*[1-9]\d*$/i', $name);
   }
 
   public function loadNamedObjects(
@@ -54,7 +54,7 @@
 
     $id_map = array();
     foreach ($names as $name) {
-      $id = (int)substr($name, 1);
+      $id = (int)@substr($name, 1);
       $id_map[$id][] = $name;
     }
 
diff --git a/src/applications/passphrase/query/PassphraseCredentialQuery.php b/src/applications/passphrase/query/PassphraseCredentialQuery.php
--- a/src/applications/passphrase/query/PassphraseCredentialQuery.php
+++ b/src/applications/passphrase/query/PassphraseCredentialQuery.php
@@ -148,7 +148,7 @@
         (int)$this->allowConduit);
     }
 
-    if (strlen($this->nameContains)) {
+    if (@strlen($this->nameContains)) {
       $where[] = qsprintf(
         $conn,
         'LOWER(c.name) LIKE %~',
diff --git a/src/applications/passphrase/query/PassphraseCredentialSearchEngine.php b/src/applications/passphrase/query/PassphraseCredentialSearchEngine.php
--- a/src/applications/passphrase/query/PassphraseCredentialSearchEngine.php
+++ b/src/applications/passphrase/query/PassphraseCredentialSearchEngine.php
@@ -37,7 +37,7 @@
       $query->withIsDestroyed($map['isDestroyed']);
     }
 
-    if (strlen($map['name'])) {
+    if (@strlen($map['name'])) {
       $query->withNameContains($map['name']);
     }
 
diff --git a/src/applications/passphrase/view/PassphraseCredentialControl.php b/src/applications/passphrase/view/PassphraseCredentialControl.php
--- a/src/applications/passphrase/view/PassphraseCredentialControl.php
+++ b/src/applications/passphrase/view/PassphraseCredentialControl.php
@@ -50,7 +50,7 @@
     // credential. Populate it into the menu to allow them to save the form
     // without making any changes.
     $current_phid = $this->getValue();
-    if (strlen($current_phid) && empty($options_map[$current_phid])) {
+    if (@strlen($current_phid) && empty($options_map[$current_phid])) {
       $viewer = $this->getViewer();
 
       $current_name = null;
diff --git a/src/applications/passphrase/xaction/PassphraseCredentialDescriptionTransaction.php b/src/applications/passphrase/xaction/PassphraseCredentialDescriptionTransaction.php
--- a/src/applications/passphrase/xaction/PassphraseCredentialDescriptionTransaction.php
+++ b/src/applications/passphrase/xaction/PassphraseCredentialDescriptionTransaction.php
@@ -15,7 +15,7 @@
 
   public function shouldHide() {
     $old = $this->getOldValue();
-    if (!strlen($old)) {
+    if (!@strlen($old)) {
       return true;
     }
     return false;
diff --git a/src/applications/passphrase/xaction/PassphraseCredentialNameTransaction.php b/src/applications/passphrase/xaction/PassphraseCredentialNameTransaction.php
--- a/src/applications/passphrase/xaction/PassphraseCredentialNameTransaction.php
+++ b/src/applications/passphrase/xaction/PassphraseCredentialNameTransaction.php
@@ -15,7 +15,7 @@
 
   public function getTitle() {
     $old = $this->getOldValue();
-    if (!strlen($old)) {
+    if (!@strlen($old)) {
       return pht(
         '%s created this credential.',
         $this->renderAuthor());
@@ -30,7 +30,7 @@
 
   public function getTitleForFeed() {
     $old = $this->getOldValue();
-    if (!strlen($old)) {
+    if (!@strlen($old)) {
       return pht(
         '%s created %s.',
         $this->renderAuthor(),
@@ -57,7 +57,7 @@
     foreach ($xactions as $xaction) {
       $new_value = $xaction->getNewValue();
 
-      $new_length = strlen($new_value);
+      $new_length = @strlen($new_value);
       if ($new_length > $max_length) {
         $errors[] = $this->newInvalidError(
           pht('The name can be no longer than %s characters.',
diff --git a/src/applications/passphrase/xaction/PassphraseCredentialUsernameTransaction.php b/src/applications/passphrase/xaction/PassphraseCredentialUsernameTransaction.php
--- a/src/applications/passphrase/xaction/PassphraseCredentialUsernameTransaction.php
+++ b/src/applications/passphrase/xaction/PassphraseCredentialUsernameTransaction.php
@@ -42,7 +42,7 @@
     $max_length = $object->getColumnMaximumByteLength('username');
     foreach ($xactions as $xaction) {
       $new_value = $xaction->getNewValue();
-      $new_length = strlen($new_value);
+      $new_length = @strlen($new_value);
       if ($new_length > $max_length) {
         $errors[] = $this->newInvalidError(
           pht('The username can be no longer than %s characters.',
diff --git a/src/applications/paste/conduit/PasteCreateConduitAPIMethod.php b/src/applications/paste/conduit/PasteCreateConduitAPIMethod.php
--- a/src/applications/paste/conduit/PasteCreateConduitAPIMethod.php
+++ b/src/applications/paste/conduit/PasteCreateConduitAPIMethod.php
@@ -43,7 +43,7 @@
     $title    = $request->getValue('title');
     $language = $request->getValue('language');
 
-    if (!strlen($content)) {
+    if (!@strlen($content)) {
       throw new ConduitException('ERR-NO-PASTE');
     }
 
@@ -64,7 +64,7 @@
       ->setTransactionType(PhabricatorPasteTitleTransaction::TRANSACTIONTYPE)
       ->setNewValue($title);
 
-    if (strlen($language)) {
+    if (@strlen($language)) {
       $xactions[] = id(new PhabricatorPasteTransaction())
         ->setTransactionType(
           PhabricatorPasteLanguageTransaction::TRANSACTIONTYPE)
diff --git a/src/applications/paste/lipsum/PhabricatorPasteTestDataGenerator.php b/src/applications/paste/lipsum/PhabricatorPasteTestDataGenerator.php
--- a/src/applications/paste/lipsum/PhabricatorPasteTestDataGenerator.php
+++ b/src/applications/paste/lipsum/PhabricatorPasteTestDataGenerator.php
@@ -22,7 +22,7 @@
       PhabricatorPasteTitleTransaction::TRANSACTIONTYPE,
       $name);
 
-    if (strlen($language) > 0) {
+    if (@strlen($language) > 0) {
         $xactions[] = $this->newTransaction(
             PhabricatorPasteLanguageTransaction::TRANSACTIONTYPE,
             $language);
diff --git a/src/applications/paste/mail/PasteMailReceiver.php b/src/applications/paste/mail/PasteMailReceiver.php
--- a/src/applications/paste/mail/PasteMailReceiver.php
+++ b/src/applications/paste/mail/PasteMailReceiver.php
@@ -12,7 +12,7 @@
   }
 
   protected function loadObject($pattern, PhabricatorUser $viewer) {
-    $id = (int)substr($pattern, 1);
+    $id = (int)@substr($pattern, 1);
 
     return id(new PhabricatorPasteQuery())
       ->setViewer($viewer)
diff --git a/src/applications/paste/phid/PhabricatorPastePastePHIDType.php b/src/applications/paste/phid/PhabricatorPastePastePHIDType.php
--- a/src/applications/paste/phid/PhabricatorPastePastePHIDType.php
+++ b/src/applications/paste/phid/PhabricatorPastePastePHIDType.php
@@ -42,7 +42,7 @@
   }
 
   public function canLoadNamedObject($name) {
-    return preg_match('/^P\d*[1-9]\d*$/i', $name);
+    return @preg_match('/^P\d*[1-9]\d*$/i', $name);
   }
 
   public function loadNamedObjects(
@@ -51,7 +51,7 @@
 
     $id_map = array();
     foreach ($names as $name) {
-      $id = (int)substr($name, 1);
+      $id = (int)@substr($name, 1);
       $id_map[$id][] = $name;
     }
 
diff --git a/src/applications/paste/query/PhabricatorPasteQuery.php b/src/applications/paste/query/PhabricatorPasteQuery.php
--- a/src/applications/paste/query/PhabricatorPasteQuery.php
+++ b/src/applications/paste/query/PhabricatorPasteQuery.php
@@ -359,7 +359,7 @@
     $lines = phutil_split_lines($snippet);
     $line_count = count($lines);
 
-    if (strlen($snippet) > 1024) {
+    if (@strlen($snippet) > 1024) {
       $snippet_type = PhabricatorPasteSnippet::FIRST_BYTES;
       $snippet = id(new PhutilUTF8StringTruncator())
         ->setMaximumBytes(1024)
diff --git a/src/applications/paste/remarkup/PhabricatorPasteRemarkupRule.php b/src/applications/paste/remarkup/PhabricatorPasteRemarkupRule.php
--- a/src/applications/paste/remarkup/PhabricatorPasteRemarkupRule.php
+++ b/src/applications/paste/remarkup/PhabricatorPasteRemarkupRule.php
@@ -26,9 +26,9 @@
       ->setPaste($object)
       ->setHandle($handle);
 
-    if (strlen($options)) {
+    if (@strlen($options)) {
       $parser = new PhutilSimpleOptions();
-      $opts = $parser->parse(substr($options, 1));
+      $opts = $parser->parse(@substr($options, 1));
 
       foreach ($opts as $key => $value) {
         if ($key == 'lines') {
@@ -38,7 +38,7 @@
 
           $to_highlight = array();
           foreach ($highlights as $highlight) {
-            $highlight = explode('-', $highlight);
+            $highlight = @explode('-', $highlight);
 
             if (!empty($highlight)) {
               sort($highlight);
diff --git a/src/applications/paste/xaction/PhabricatorPasteContentTransaction.php b/src/applications/paste/xaction/PhabricatorPasteContentTransaction.php
--- a/src/applications/paste/xaction/PhabricatorPasteContentTransaction.php
+++ b/src/applications/paste/xaction/PhabricatorPasteContentTransaction.php
@@ -53,7 +53,7 @@
     $editor = $this->getEditor();
 
     $file_name = $editor->getNewPasteTitle();
-    if (!strlen($file_name)) {
+    if (!@strlen($file_name)) {
       $file_name = 'raw-paste-data.txt';
     }
 
diff --git a/src/applications/paste/xaction/PhabricatorPasteLanguageTransaction.php b/src/applications/paste/xaction/PhabricatorPasteLanguageTransaction.php
--- a/src/applications/paste/xaction/PhabricatorPasteLanguageTransaction.php
+++ b/src/applications/paste/xaction/PhabricatorPasteLanguageTransaction.php
@@ -14,7 +14,7 @@
   }
 
   private function renderLanguageValue($value) {
-    if (!strlen($value)) {
+    if (!@strlen($value)) {
       return $this->renderValue(pht('autodetect'));
     } else {
       return $this->renderValue($value);
@@ -44,7 +44,7 @@
     foreach ($xactions as $xaction) {
       $new = $xaction->getNewValue();
 
-      if ($new !== null && !strlen($new)) {
+      if ($new !== null && !@strlen($new)) {
         $errors[] = $this->newInvalidError(
           pht('Paste language must be null or a nonempty string.'),
           $xaction);
diff --git a/src/applications/paste/xaction/PhabricatorPasteTitleTransaction.php b/src/applications/paste/xaction/PhabricatorPasteTitleTransaction.php
--- a/src/applications/paste/xaction/PhabricatorPasteTitleTransaction.php
+++ b/src/applications/paste/xaction/PhabricatorPasteTitleTransaction.php
@@ -17,13 +17,13 @@
     $old = $this->getOldValue();
     $new = $this->getNewValue();
 
-    if (strlen($old) && strlen($new)) {
+    if (@strlen($old) && @strlen($new)) {
       return pht(
         '%s changed the title of this paste from %s to %s.',
         $this->renderAuthor(),
         $this->renderOldValue(),
         $this->renderNewValue());
-    } else if (strlen($new)) {
+    } else if (@strlen($new)) {
       return pht(
         '%s changed the title of this paste from untitled to %s.',
         $this->renderAuthor(),
@@ -40,14 +40,14 @@
     $old = $this->getOldValue();
     $new = $this->getNewValue();
 
-    if (strlen($old) && strlen($new)) {
+    if (@strlen($old) && @strlen($new)) {
       return pht(
         '%s updated the title for %s from %s to %s.',
         $this->renderAuthor(),
         $this->renderObject(),
         $this->renderOldValue(),
         $this->renderNewValue());
-    } else if (strlen($new)) {
+    } else if (@strlen($new)) {
       return pht(
         '%s updated the title for %s from untitled to %s.',
         $this->renderAuthor(),
diff --git a/src/applications/people/cache/PhabricatorUserProfileImageCacheType.php b/src/applications/people/cache/PhabricatorUserProfileImageCacheType.php
--- a/src/applications/people/cache/PhabricatorUserProfileImageCacheType.php
+++ b/src/applications/people/cache/PhabricatorUserProfileImageCacheType.php
@@ -82,7 +82,7 @@
   }
 
   public function getValueFromStorage($value) {
-    $parts = explode(',', $value, 2);
+    $parts = @explode(',', $value, 2);
     return end($parts);
   }
 
@@ -91,7 +91,7 @@
   }
 
   public function isRawCacheDataValid(PhabricatorUser $user, $key, $data) {
-    $parts = explode(',', $data, 2);
+    $parts = @explode(',', $data, 2);
     $version = reset($parts);
     return ($version === $this->getCacheVersion($user));
   }
diff --git a/src/applications/people/controller/PhabricatorPeopleInviteSendController.php b/src/applications/people/controller/PhabricatorPeopleInviteSendController.php
--- a/src/applications/people/controller/PhabricatorPeopleInviteSendController.php
+++ b/src/applications/people/controller/PhabricatorPeopleInviteSendController.php
@@ -22,7 +22,7 @@
       // addresses with names often include spaces.
       $email_list = preg_split('/[,;\n]+/', $emails);
       foreach ($email_list as $key => $email) {
-        if (!strlen(trim($email))) {
+        if (!@strlen(trim($email))) {
           unset($email_list[$key]);
         }
       }
@@ -80,7 +80,7 @@
             '%s has invited you to join Phabricator.',
             $viewer->getFullName());
 
-          if (strlen(trim($message))) {
+          if (@strlen(trim($message))) {
             $template[] = $message;
           }
 
diff --git a/src/applications/people/controller/PhabricatorPeopleNewController.php b/src/applications/people/controller/PhabricatorPeopleNewController.php
--- a/src/applications/people/controller/PhabricatorPeopleNewController.php
+++ b/src/applications/people/controller/PhabricatorPeopleNewController.php
@@ -47,7 +47,7 @@
       $user->setUsername($request->getStr('username'));
 
       $new_email = $request->getStr('email');
-      if (!strlen($new_email)) {
+      if (!@strlen($new_email)) {
         $errors[] = pht('Email is required.');
         $e_email = pht('Required');
       } else if (!PhabricatorUserEmail::isValidAddress($new_email)) {
@@ -62,7 +62,7 @@
 
       $user->setRealName($request->getStr('realname'));
 
-      if (!strlen($user->getUsername())) {
+      if (!@strlen($user->getUsername())) {
         $errors[] = pht('Username is required.');
         $e_username = pht('Required');
       } else if (!PhabricatorUser::validateUsername($user->getUsername())) {
@@ -72,7 +72,7 @@
         $e_username = null;
       }
 
-      if (!strlen($user->getRealName()) && $require_real_name) {
+      if (!@strlen($user->getRealName()) && $require_real_name) {
         $errors[] = pht('Real name is required.');
         $e_realname = pht('Required');
       } else {
diff --git a/src/applications/people/controller/PhabricatorPeopleRenameController.php b/src/applications/people/controller/PhabricatorPeopleRenameController.php
--- a/src/applications/people/controller/PhabricatorPeopleRenameController.php
+++ b/src/applications/people/controller/PhabricatorPeopleRenameController.php
@@ -34,7 +34,7 @@
       $message_body = PhabricatorAuthMessage::loadMessageText(
         $viewer,
         PhabricatorAuthChangeUsernameMessageType::MESSAGEKEY);
-      if (strlen($message_body)) {
+      if (@strlen($message_body)) {
         $dialog->appendRemarkup($message_body);
       }
 
diff --git a/src/applications/people/controller/PhabricatorPeopleWelcomeController.php b/src/applications/people/controller/PhabricatorPeopleWelcomeController.php
--- a/src/applications/people/controller/PhabricatorPeopleWelcomeController.php
+++ b/src/applications/people/controller/PhabricatorPeopleWelcomeController.php
@@ -40,7 +40,7 @@
     $v_message = $request->getStr('message');
 
     if ($request->isFormPost()) {
-      if (strlen($v_message)) {
+      if (@strlen($v_message)) {
         $welcome_engine->setWelcomeMessage($v_message);
       }
 
@@ -51,7 +51,7 @@
     $default_message = PhabricatorAuthMessage::loadMessage(
       $admin,
       PhabricatorAuthWelcomeMailMessageType::MESSAGEKEY);
-    if ($default_message && strlen($default_message->getMessageText())) {
+    if ($default_message && @strlen($default_message->getMessageText())) {
       $message_instructions = pht(
         'The email will identify you as the sender. You may optionally '.
         'replace the [[ %s | default custom mail body ]] with different text '.
diff --git a/src/applications/people/customfield/PhabricatorUserBlurbField.php b/src/applications/people/customfield/PhabricatorUserBlurbField.php
--- a/src/applications/people/customfield/PhabricatorUserBlurbField.php
+++ b/src/applications/people/customfield/PhabricatorUserBlurbField.php
@@ -84,7 +84,7 @@
 
   public function renderPropertyViewValue(array $handles) {
     $blurb = $this->getObject()->loadUserProfile()->getBlurb();
-    if (!strlen($blurb)) {
+    if (!@strlen($blurb)) {
       return null;
     }
 
diff --git a/src/applications/people/engineextension/PhabricatorPeopleDatasourceEngineExtension.php b/src/applications/people/engineextension/PhabricatorPeopleDatasourceEngineExtension.php
--- a/src/applications/people/engineextension/PhabricatorPeopleDatasourceEngineExtension.php
+++ b/src/applications/people/engineextension/PhabricatorPeopleDatasourceEngineExtension.php
@@ -13,13 +13,13 @@
     $viewer = $this->getViewer();
 
     // Send "u" to the user directory.
-    if (preg_match('/^u\z/i', $query)) {
+    if (@preg_match('/^u\z/i', $query)) {
       return '/people/';
     }
 
     // Send "u <string>" to the user's profile page.
     $matches = null;
-    if (preg_match('/^u\s+(.+)\z/i', $query, $matches)) {
+    if (@preg_match('/^u\s+(.+)\z/i', $query, $matches)) {
       $raw_query = $matches[1];
 
       // TODO: We could test that this is a valid username and jump to
diff --git a/src/applications/people/lipsum/PhabricatorPeopleTestDataGenerator.php b/src/applications/people/lipsum/PhabricatorPeopleTestDataGenerator.php
--- a/src/applications/people/lipsum/PhabricatorPeopleTestDataGenerator.php
+++ b/src/applications/people/lipsum/PhabricatorPeopleTestDataGenerator.php
@@ -42,10 +42,10 @@
   }
 
   protected function generateUsername($random_real_name) {
-    $name = strtolower($random_real_name);
+    $name = @strtolower($random_real_name);
     $name = preg_replace('/[^a-z]/s'  , ' ', $name);
     $name = preg_replace('/\s+/', ' ', $name);
-    $words = explode(' ', $name);
+    $words = @explode(' ', $name);
     $random = rand(0, 4);
     $reduced = '';
     if ($random == 0) {
diff --git a/src/applications/people/mail/PhabricatorPeopleEmailLoginMailEngine.php b/src/applications/people/mail/PhabricatorPeopleEmailLoginMailEngine.php
--- a/src/applications/people/mail/PhabricatorPeopleEmailLoginMailEngine.php
+++ b/src/applications/people/mail/PhabricatorPeopleEmailLoginMailEngine.php
@@ -60,7 +60,7 @@
     $message_body = PhabricatorAuthMessage::loadMessageText(
       $recipient,
       $message_key);
-    if (strlen($message_body)) {
+    if (@strlen($message_body)) {
       $body[] = $this->newRemarkupText($message_body);
     }
 
diff --git a/src/applications/people/mail/PhabricatorPeopleWelcomeMailEngine.php b/src/applications/people/mail/PhabricatorPeopleWelcomeMailEngine.php
--- a/src/applications/people/mail/PhabricatorPeopleWelcomeMailEngine.php
+++ b/src/applications/people/mail/PhabricatorPeopleWelcomeMailEngine.php
@@ -112,14 +112,14 @@
     $recipient = $this->getRecipient();
 
     $custom_body = $this->getWelcomeMessage();
-    if (strlen($custom_body)) {
+    if (@strlen($custom_body)) {
       return $this->newRemarkupText($custom_body);
     }
 
     $default_body = PhabricatorAuthMessage::loadMessageText(
       $recipient,
       PhabricatorAuthWelcomeMailMessageType::MESSAGEKEY);
-    if (strlen($default_body)) {
+    if (@strlen($default_body)) {
       return $this->newRemarkupText($default_body);
     }
 
diff --git a/src/applications/people/management/PhabricatorPeopleManagementWorkflow.php b/src/applications/people/management/PhabricatorPeopleManagementWorkflow.php
--- a/src/applications/people/management/PhabricatorPeopleManagementWorkflow.php
+++ b/src/applications/people/management/PhabricatorPeopleManagementWorkflow.php
@@ -16,7 +16,7 @@
   final protected function selectUser(PhutilArgumentParser $argv) {
     $username = $argv->getArg('user');
 
-    if (!strlen($username)) {
+    if (!@strlen($username)) {
       throw new PhutilArgumentUsageException(
         pht(
           'Select a user account to act on with "--user <username>".'));
diff --git a/src/applications/people/markup/PhabricatorMentionRemarkupRule.php b/src/applications/people/markup/PhabricatorMentionRemarkupRule.php
--- a/src/applications/people/markup/PhabricatorMentionRemarkupRule.php
+++ b/src/applications/people/markup/PhabricatorMentionRemarkupRule.php
@@ -44,7 +44,7 @@
 
     $metadata_key = self::KEY_RULE_MENTION;
     $metadata = $engine->getTextMetadata($metadata_key, array());
-    $username = strtolower($matches[1]);
+    $username = @strtolower($matches[1]);
     if (empty($metadata[$username])) {
       $metadata[$username] = array();
     }
@@ -80,7 +80,7 @@
     $mentioned_key = self::KEY_MENTIONED;
     $mentioned = $engine->getTextMetadata($mentioned_key, array());
     foreach ($users as $row) {
-      $actual_users[strtolower($row->getUserName())] = $row;
+      $actual_users[@strtolower($row->getUserName())] = $row;
       $mentioned[$row->getPHID()] = $row->getPHID();
     }
 
diff --git a/src/applications/people/menuitem/PhabricatorPeopleBadgesProfileMenuItem.php b/src/applications/people/menuitem/PhabricatorPeopleBadgesProfileMenuItem.php
--- a/src/applications/people/menuitem/PhabricatorPeopleBadgesProfileMenuItem.php
+++ b/src/applications/people/menuitem/PhabricatorPeopleBadgesProfileMenuItem.php
@@ -22,7 +22,7 @@
     PhabricatorProfileMenuItemConfiguration $config) {
     $name = $config->getMenuItemProperty('name');
 
-    if (strlen($name)) {
+    if (@strlen($name)) {
       return $name;
     }
 
diff --git a/src/applications/people/menuitem/PhabricatorPeopleCommitsProfileMenuItem.php b/src/applications/people/menuitem/PhabricatorPeopleCommitsProfileMenuItem.php
--- a/src/applications/people/menuitem/PhabricatorPeopleCommitsProfileMenuItem.php
+++ b/src/applications/people/menuitem/PhabricatorPeopleCommitsProfileMenuItem.php
@@ -22,7 +22,7 @@
     PhabricatorProfileMenuItemConfiguration $config) {
     $name = $config->getMenuItemProperty('name');
 
-    if (strlen($name)) {
+    if (@strlen($name)) {
       return $name;
     }
 
diff --git a/src/applications/people/menuitem/PhabricatorPeopleDetailsProfileMenuItem.php b/src/applications/people/menuitem/PhabricatorPeopleDetailsProfileMenuItem.php
--- a/src/applications/people/menuitem/PhabricatorPeopleDetailsProfileMenuItem.php
+++ b/src/applications/people/menuitem/PhabricatorPeopleDetailsProfileMenuItem.php
@@ -17,7 +17,7 @@
     PhabricatorProfileMenuItemConfiguration $config) {
     $name = $config->getMenuItemProperty('name');
 
-    if (strlen($name)) {
+    if (@strlen($name)) {
       return $name;
     }
 
diff --git a/src/applications/people/menuitem/PhabricatorPeopleManageProfileMenuItem.php b/src/applications/people/menuitem/PhabricatorPeopleManageProfileMenuItem.php
--- a/src/applications/people/menuitem/PhabricatorPeopleManageProfileMenuItem.php
+++ b/src/applications/people/menuitem/PhabricatorPeopleManageProfileMenuItem.php
@@ -22,7 +22,7 @@
     PhabricatorProfileMenuItemConfiguration $config) {
     $name = $config->getMenuItemProperty('name');
 
-    if (strlen($name)) {
+    if (@strlen($name)) {
       return $name;
     }
 
diff --git a/src/applications/people/menuitem/PhabricatorPeopleRevisionsProfileMenuItem.php b/src/applications/people/menuitem/PhabricatorPeopleRevisionsProfileMenuItem.php
--- a/src/applications/people/menuitem/PhabricatorPeopleRevisionsProfileMenuItem.php
+++ b/src/applications/people/menuitem/PhabricatorPeopleRevisionsProfileMenuItem.php
@@ -22,7 +22,7 @@
     PhabricatorProfileMenuItemConfiguration $config) {
     $name = $config->getMenuItemProperty('name');
 
-    if (strlen($name)) {
+    if (@strlen($name)) {
       return $name;
     }
 
diff --git a/src/applications/people/menuitem/PhabricatorPeopleTasksProfileMenuItem.php b/src/applications/people/menuitem/PhabricatorPeopleTasksProfileMenuItem.php
--- a/src/applications/people/menuitem/PhabricatorPeopleTasksProfileMenuItem.php
+++ b/src/applications/people/menuitem/PhabricatorPeopleTasksProfileMenuItem.php
@@ -22,7 +22,7 @@
     PhabricatorProfileMenuItemConfiguration $config) {
     $name = $config->getMenuItemProperty('name');
 
-    if (strlen($name)) {
+    if (@strlen($name)) {
       return $name;
     }
 
diff --git a/src/applications/people/phid/PhabricatorPeopleUserPHIDType.php b/src/applications/people/phid/PhabricatorPeopleUserPHIDType.php
--- a/src/applications/people/phid/PhabricatorPeopleUserPHIDType.php
+++ b/src/applications/people/phid/PhabricatorPeopleUserPHIDType.php
@@ -87,7 +87,7 @@
   }
 
   public function canLoadNamedObject($name) {
-    return preg_match('/^@.+/', $name);
+    return @preg_match('/^@.+/', $name);
   }
 
   public function loadNamedObjects(
@@ -96,7 +96,7 @@
 
     $id_map = array();
     foreach ($names as $name) {
-      $id = substr($name, 1);
+      $id = @substr($name, 1);
       $id = phutil_utf8_strtolower($id);
       $id_map[$id][] = $name;
     }
diff --git a/src/applications/people/query/PhabricatorPeopleLogSearchEngine.php b/src/applications/people/query/PhabricatorPeopleLogSearchEngine.php
--- a/src/applications/people/query/PhabricatorPeopleLogSearchEngine.php
+++ b/src/applications/people/query/PhabricatorPeopleLogSearchEngine.php
@@ -46,7 +46,7 @@
       $query->withActions($map['actions']);
     }
 
-    if (strlen($map['ip'])) {
+    if (@strlen($map['ip'])) {
       $query->withRemoteAddressPrefix($map['ip']);
     }
 
@@ -227,7 +227,7 @@
         'user' => $user_name,
         'action' => $action,
         'actionName' => $action_name,
-        'session' => substr($log->getSession(), 0, 6),
+        'session' => @substr($log->getSession(), 0, 6),
         'old' => $log->getOldValue(),
         'new' => $log->getNewValue(),
       );
diff --git a/src/applications/people/query/PhabricatorPeopleQuery.php b/src/applications/people/query/PhabricatorPeopleQuery.php
--- a/src/applications/people/query/PhabricatorPeopleQuery.php
+++ b/src/applications/people/query/PhabricatorPeopleQuery.php
@@ -341,7 +341,7 @@
         (int)$this->isMailingList);
     }
 
-    if (strlen($this->nameLike)) {
+    if (@strlen($this->nameLike)) {
       $where[] = qsprintf(
         $conn,
         'user.username LIKE %~ OR user.realname LIKE %~',
diff --git a/src/applications/people/storage/PhabricatorUser.php b/src/applications/people/storage/PhabricatorUser.php
--- a/src/applications/people/storage/PhabricatorUser.php
+++ b/src/applications/people/storage/PhabricatorUser.php
@@ -275,7 +275,7 @@
       $this->setConduitCertificate($this->generateConduitCertificate());
     }
 
-    if (!strlen($this->getAccountSecret())) {
+    if (!@strlen($this->getAccountSecret())) {
       $this->setAccountSecret(Filesystem::readRandomCharacters(64));
     }
 
@@ -522,11 +522,11 @@
     //  - Unit tests, obviously.
     //  - describeValidUsername() method, above.
 
-    if (strlen($username) > self::MAXIMUM_USERNAME_LENGTH) {
+    if (@strlen($username) > self::MAXIMUM_USERNAME_LENGTH) {
       return false;
     }
 
-    return (bool)preg_match('/^[a-zA-Z0-9._-]*[a-zA-Z0-9_-]\z/', $username);
+    return (bool)@preg_match('/^[a-zA-Z0-9._-]*[a-zA-Z0-9_-]\z/', $username);
   }
 
   public static function getDefaultProfileImageURI() {
@@ -554,7 +554,7 @@
   }
 
   public function getFullName() {
-    if (strlen($this->getRealName())) {
+    if (@strlen($this->getRealName())) {
       return $this->getUsername().' ('.$this->getRealName().')';
     } else {
       return $this->getUsername();
diff --git a/src/applications/people/storage/PhabricatorUserEmail.php b/src/applications/people/storage/PhabricatorUserEmail.php
--- a/src/applications/people/storage/PhabricatorUserEmail.php
+++ b/src/applications/people/storage/PhabricatorUserEmail.php
@@ -73,7 +73,7 @@
    * @task restrictions
    */
   public static function isValidAddress($address) {
-    if (strlen($address) > self::MAX_ADDRESS_LENGTH) {
+    if (@strlen($address) > self::MAX_ADDRESS_LENGTH) {
       return false;
     }
 
@@ -90,7 +90,7 @@
     // "@" symbol, and then some more normal text.
 
     $email_regex = '(^[a-z0-9_+.!-]+@[a-z0-9_+:.-]+\z)i';
-    if (!preg_match($email_regex, $address)) {
+    if (!@preg_match($email_regex, $address)) {
       return false;
     }
 
diff --git a/src/applications/people/storage/PhabricatorUserProfile.php b/src/applications/people/storage/PhabricatorUserProfile.php
--- a/src/applications/people/storage/PhabricatorUserProfile.php
+++ b/src/applications/people/storage/PhabricatorUserProfile.php
@@ -37,7 +37,7 @@
 
   public function getDisplayTitle() {
     $title = $this->getTitle();
-    if (strlen($title)) {
+    if (@strlen($title)) {
       return $title;
     }
 
diff --git a/src/applications/people/view/PhabricatorUserLogView.php b/src/applications/people/view/PhabricatorUserLogView.php
--- a/src/applications/people/view/PhabricatorUserLogView.php
+++ b/src/applications/people/view/PhabricatorUserLogView.php
@@ -36,7 +36,7 @@
 
     $rows = array();
     foreach ($logs as $log) {
-      $session = substr($log->getSession(), 0, 6);
+      $session = @substr($log->getSession(), 0, 6);
 
       $actor_phid = $log->getActorPHID();
       $user_phid = $log->getUserPHID();
diff --git a/src/applications/people/xaction/PhabricatorUserUsernameTransaction.php b/src/applications/people/xaction/PhabricatorUserUsernameTransaction.php
--- a/src/applications/people/xaction/PhabricatorUserUsernameTransaction.php
+++ b/src/applications/people/xaction/PhabricatorUserUsernameTransaction.php
@@ -70,7 +70,7 @@
           pht('You must be an administrator to rename users.'));
       }
 
-      if (!strlen($new)) {
+      if (!@strlen($new)) {
         $errors[] = $this->newInvalidError(
           pht('New username is required.'),
           $xaction);
diff --git a/src/applications/phame/controller/PhameLiveController.php b/src/applications/phame/controller/PhameLiveController.php
--- a/src/applications/phame/controller/PhameLiveController.php
+++ b/src/applications/phame/controller/PhameLiveController.php
@@ -87,7 +87,7 @@
     $this->isExternal = $is_external;
     $this->isLive = $is_live;
 
-    if (strlen($post_id)) {
+    if (@strlen($post_id)) {
       $post_query = id(new PhamePostQuery())
         ->setViewer($viewer)
         ->needHeaderImage(true)
diff --git a/src/applications/phame/controller/blog/PhameBlogManageController.php b/src/applications/phame/controller/blog/PhameBlogManageController.php
--- a/src/applications/phame/controller/blog/PhameBlogManageController.php
+++ b/src/applications/phame/controller/blog/PhameBlogManageController.php
@@ -149,7 +149,7 @@
       ->process();
 
     $description = $blog->getDescription();
-    if (strlen($description)) {
+    if (@strlen($description)) {
       $description = new PHUIRemarkupView($viewer, $description);
       $properties->addSectionHeader(
         pht('Description'),
diff --git a/src/applications/phame/controller/blog/PhameBlogViewController.php b/src/applications/phame/controller/blog/PhameBlogViewController.php
--- a/src/applications/phame/controller/blog/PhameBlogViewController.php
+++ b/src/applications/phame/controller/blog/PhameBlogViewController.php
@@ -90,7 +90,7 @@
       ->appendChild($post_list);
 
     $description = null;
-    if (strlen($blog->getDescription())) {
+    if (@strlen($blog->getDescription())) {
       $description = new PHUIRemarkupView(
         $viewer,
         $blog->getDescription());
diff --git a/src/applications/phame/mail/PhamePostMailReceiver.php b/src/applications/phame/mail/PhamePostMailReceiver.php
--- a/src/applications/phame/mail/PhamePostMailReceiver.php
+++ b/src/applications/phame/mail/PhamePostMailReceiver.php
@@ -13,7 +13,7 @@
   }
 
   protected function loadObject($pattern, PhabricatorUser $viewer) {
-    $id = (int)substr($pattern, 1);
+    $id = (int)@substr($pattern, 1);
 
     return id(new PhamePostQuery())
       ->setViewer($viewer)
diff --git a/src/applications/phame/site/PhameSite.php b/src/applications/phame/site/PhameSite.php
--- a/src/applications/phame/site/PhameSite.php
+++ b/src/applications/phame/site/PhameSite.php
@@ -4,7 +4,7 @@
 
   protected function isPhameActive() {
     $base_uri = PhabricatorEnv::getEnvConfig('phabricator.base-uri');
-    if (!strlen($base_uri)) {
+    if (!@strlen($base_uri)) {
       // Don't activate Phame if we don't have a base URI configured.
       return false;
     }
diff --git a/src/applications/phame/storage/PhameBlog.php b/src/applications/phame/storage/PhameBlog.php
--- a/src/applications/phame/storage/PhameBlog.php
+++ b/src/applications/phame/storage/PhameBlog.php
@@ -134,7 +134,7 @@
           $example_domain);
     }
 
-    if (strlen($path) && $path != '/') {
+    if (@strlen($path) && $path != '/') {
       return pht(
           'The custom domain should not specify a path (hosting a Phame '.
           'blog at a path is currently not supported). Instead, just provide '.
@@ -142,7 +142,7 @@
           $example_domain);
     }
 
-    if (strpos($domain, '.') === false) {
+    if (@strpos($domain, '.') === false) {
       return pht(
           'The custom domain should contain at least one dot (.) because '.
           'some browsers fail to set cookies on domains without a dot. '.
@@ -169,7 +169,7 @@
   }
 
   public function getLiveURI() {
-    if (strlen($this->getDomain())) {
+    if (@strlen($this->getDomain())) {
       return $this->getExternalLiveURI();
     } else {
       return $this->getInternalLiveURI();
diff --git a/src/applications/phame/storage/PhamePost.php b/src/applications/phame/storage/PhamePost.php
--- a/src/applications/phame/storage/PhamePost.php
+++ b/src/applications/phame/storage/PhamePost.php
@@ -63,7 +63,7 @@
     $blog = $this->getBlog();
     $is_draft = $this->isDraft();
     $is_archived = $this->isArchived();
-    if (strlen($blog->getDomain()) && !$is_draft && !$is_archived) {
+    if (@strlen($blog->getDomain()) && !$is_draft && !$is_archived) {
       return $this->getExternalLiveURI();
     } else {
       return $this->getInternalLiveURI();
diff --git a/src/applications/phame/xaction/PhameBlogFullDomainTransaction.php b/src/applications/phame/xaction/PhameBlogFullDomainTransaction.php
--- a/src/applications/phame/xaction/PhameBlogFullDomainTransaction.php
+++ b/src/applications/phame/xaction/PhameBlogFullDomainTransaction.php
@@ -10,7 +10,7 @@
   }
 
   public function applyInternalEffects($object, $value) {
-    if (strlen($value)) {
+    if (@strlen($value)) {
       $uri = new PhutilURI($value);
       $domain = $uri->getDomain();
       $object->setDomain($domain);
@@ -22,7 +22,7 @@
 
   public function getTitle() {
     $old = $this->getOldValue();
-    if (!strlen($old)) {
+    if (!@strlen($old)) {
       return pht(
         '%s set this blog\'s full domain to %s.',
         $this->renderAuthor(),
@@ -38,7 +38,7 @@
 
   public function getTitleForFeed() {
     $old = $this->getOldValue();
-    if (!strlen($old)) {
+    if (!@strlen($old)) {
       return pht(
         '%s set %s blog\'s full domain to %s.',
         $this->renderAuthor(),
diff --git a/src/applications/phame/xaction/PhameBlogNameTransaction.php b/src/applications/phame/xaction/PhameBlogNameTransaction.php
--- a/src/applications/phame/xaction/PhameBlogNameTransaction.php
+++ b/src/applications/phame/xaction/PhameBlogNameTransaction.php
@@ -41,7 +41,7 @@
     $max_length = $object->getColumnMaximumByteLength('name');
     foreach ($xactions as $xaction) {
       $new_value = $xaction->getNewValue();
-      $new_length = strlen($new_value);
+      $new_length = @strlen($new_value);
       if ($new_length > $max_length) {
         $errors[] = $this->newInvalidError(
           pht('The name can be no longer than %s characters.',
diff --git a/src/applications/phame/xaction/PhameBlogParentDomainTransaction.php b/src/applications/phame/xaction/PhameBlogParentDomainTransaction.php
--- a/src/applications/phame/xaction/PhameBlogParentDomainTransaction.php
+++ b/src/applications/phame/xaction/PhameBlogParentDomainTransaction.php
@@ -15,7 +15,7 @@
 
   public function getTitle() {
     $old = $this->getOldValue();
-    if (!strlen($old)) {
+    if (!@strlen($old)) {
       return pht(
         '%s set this blog\'s parent domain to %s.',
         $this->renderAuthor(),
@@ -31,7 +31,7 @@
 
   public function getTitleForFeed() {
     $old = $this->getOldValue();
-    if (!strlen($old)) {
+    if (!@strlen($old)) {
       return pht(
         '%s set %s blog\'s parent domain to %s.',
         $this->renderAuthor(),
@@ -69,7 +69,7 @@
     $max_length = $object->getColumnMaximumByteLength('parentDomain');
     foreach ($xactions as $xaction) {
       $new_value = $xaction->getNewValue();
-      $new_length = strlen($new_value);
+      $new_length = @strlen($new_value);
       if ($new_length > $max_length) {
         $errors[] = $this->newInvalidError(
           pht('The parent domain can be no longer than %s characters.',
diff --git a/src/applications/phame/xaction/PhameBlogParentSiteTransaction.php b/src/applications/phame/xaction/PhameBlogParentSiteTransaction.php
--- a/src/applications/phame/xaction/PhameBlogParentSiteTransaction.php
+++ b/src/applications/phame/xaction/PhameBlogParentSiteTransaction.php
@@ -15,7 +15,7 @@
 
   public function getTitle() {
     $old = $this->getOldValue();
-    if (!strlen($old)) {
+    if (!@strlen($old)) {
       return pht(
         '%s set this blog\'s parent site to %s.',
         $this->renderAuthor(),
@@ -31,7 +31,7 @@
 
   public function getTitleForFeed() {
     $old = $this->getOldValue();
-    if (!strlen($old)) {
+    if (!@strlen($old)) {
       return pht(
         '%s set %s blog\'s parent site to %s.',
         $this->renderAuthor(),
@@ -53,7 +53,7 @@
     $max_length = $object->getColumnMaximumByteLength('parentSite');
     foreach ($xactions as $xaction) {
       $new_value = $xaction->getNewValue();
-      $new_length = strlen($new_value);
+      $new_length = @strlen($new_value);
       if ($new_length > $max_length) {
         $errors[] = $this->newInvalidError(
           pht('The parent site can be no longer than %s characters.',
diff --git a/src/applications/phame/xaction/PhameBlogSubtitleTransaction.php b/src/applications/phame/xaction/PhameBlogSubtitleTransaction.php
--- a/src/applications/phame/xaction/PhameBlogSubtitleTransaction.php
+++ b/src/applications/phame/xaction/PhameBlogSubtitleTransaction.php
@@ -49,7 +49,7 @@
     $max_length = $object->getColumnMaximumByteLength('subtitle');
     foreach ($xactions as $xaction) {
       $new_value = $xaction->getNewValue();
-      $new_length = strlen($new_value);
+      $new_length = @strlen($new_value);
       if ($new_length > $max_length) {
         $errors[] = $this->newInvalidError(
           pht('The subtitle can be no longer than %s characters.',
diff --git a/src/applications/phame/xaction/PhamePostSubtitleTransaction.php b/src/applications/phame/xaction/PhamePostSubtitleTransaction.php
--- a/src/applications/phame/xaction/PhamePostSubtitleTransaction.php
+++ b/src/applications/phame/xaction/PhamePostSubtitleTransaction.php
@@ -49,7 +49,7 @@
     $max_length = $object->getColumnMaximumByteLength('subtitle');
     foreach ($xactions as $xaction) {
       $new_value = $xaction->getNewValue();
-      $new_length = strlen($new_value);
+      $new_length = @strlen($new_value);
       if ($new_length > $max_length) {
         $errors[] = $this->newInvalidError(
           pht('The subtitle can be no longer than %s characters.',
diff --git a/src/applications/phame/xaction/PhamePostTitleTransaction.php b/src/applications/phame/xaction/PhamePostTitleTransaction.php
--- a/src/applications/phame/xaction/PhamePostTitleTransaction.php
+++ b/src/applications/phame/xaction/PhamePostTitleTransaction.php
@@ -41,7 +41,7 @@
     $max_length = $object->getColumnMaximumByteLength('title');
     foreach ($xactions as $xaction) {
       $new_value = $xaction->getNewValue();
-      $new_length = strlen($new_value);
+      $new_length = @strlen($new_value);
       if ($new_length > $max_length) {
         $errors[] = $this->newInvalidError(
           pht('The title can be no longer than %s characters.',
diff --git a/src/applications/phid/handle/pool/PhabricatorHandleList.php b/src/applications/phid/handle/pool/PhabricatorHandleList.php
--- a/src/applications/phid/handle/pool/PhabricatorHandleList.php
+++ b/src/applications/phid/handle/pool/PhabricatorHandleList.php
@@ -150,6 +150,7 @@
 /* -(  ArrayAccess  )-------------------------------------------------------- */
 
 
+  #[\ReturnTypeWillChange]
   public function offsetExists($offset) {
     // NOTE: We're intentionally not loading handles here so that isset()
     // checks do not trigger fetches. This gives us better bulk loading
@@ -162,6 +163,7 @@
     return isset($this->map[$offset]);
   }
 
+  #[\ReturnTypeWillChange]
   public function offsetGet($offset) {
     if ($this->handles === null) {
       $this->loadHandles();
@@ -169,10 +171,12 @@
     return $this->handles[$offset];
   }
 
+  #[\ReturnTypeWillChange]
   public function offsetSet($offset, $value) {
     $this->raiseImmutableException();
   }
 
+  #[\ReturnTypeWillChange]
   public function offsetUnset($offset) {
     $this->raiseImmutableException();
   }
@@ -189,6 +193,7 @@
 /* -(  Countable  )---------------------------------------------------------- */
 
 
+  #[\ReturnTypeWillChange]
   public function count() {
     return $this->count;
   }
diff --git a/src/applications/phid/query/PhabricatorObjectListQuery.php b/src/applications/phid/query/PhabricatorObjectListQuery.php
--- a/src/applications/phid/query/PhabricatorObjectListQuery.php
+++ b/src/applications/phid/query/PhabricatorObjectListQuery.php
@@ -61,13 +61,13 @@
     $names = preg_replace('/\s+/', ' ', $names);
 
     // Split the list on commas.
-    $names = explode(',', $names);
+    $names = @explode(',', $names);
 
     // Trim and remove empty tokens.
     foreach ($names as $key => $name) {
       $name = trim($name);
 
-      if (!strlen($name)) {
+      if (!@strlen($name)) {
         unset($names[$key]);
         continue;
       }
@@ -80,12 +80,12 @@
 
     $name_map = array();
     foreach ($names as $name) {
-      $parts = explode(' ', $name);
+      $parts = @explode(' ', $name);
 
       // If this looks like a monogram, ignore anything after the first token.
       // This allows us to parse "O123 Package Name" as though it was "O123",
       // which we can look up.
-      if (preg_match('/^[A-Z]\d+\z/', $parts[0])) {
+      if (@preg_match('/^[A-Z]\d+\z/', $parts[0])) {
         $name_map[$parts[0]] = $name;
       } else {
         // For anything else, split it on spaces and use each token as a
@@ -252,12 +252,12 @@
   }
 
   private function hasSuffix($key, $suffix) {
-    return (substr($key, -strlen($suffix)) === $suffix);
+    return (@substr($key, -@strlen($suffix)) === $suffix);
   }
 
   private function stripSuffix($key, $suffix) {
     if ($this->hasSuffix($key, $suffix)) {
-      return substr($key, 0, -strlen($suffix));
+      return @substr($key, 0, -@strlen($suffix));
     }
 
     return $key;
diff --git a/src/applications/phid/resolver/PhabricatorProjectPHIDResolver.php b/src/applications/phid/resolver/PhabricatorProjectPHIDResolver.php
--- a/src/applications/phid/resolver/PhabricatorProjectPHIDResolver.php
+++ b/src/applications/phid/resolver/PhabricatorProjectPHIDResolver.php
@@ -19,7 +19,7 @@
 
     $results = array();
     foreach ($projects as $hashtag => $project) {
-      $results[substr($hashtag, 1)] = $project->getPHID();
+      $results[@substr($hashtag, 1)] = $project->getPHID();
     }
 
     return $results;
diff --git a/src/applications/phid/resolver/PhabricatorUserPHIDResolver.php b/src/applications/phid/resolver/PhabricatorUserPHIDResolver.php
--- a/src/applications/phid/resolver/PhabricatorUserPHIDResolver.php
+++ b/src/applications/phid/resolver/PhabricatorUserPHIDResolver.php
@@ -18,7 +18,7 @@
 
     $results = array();
     foreach ($users as $at_username => $user) {
-      $results[substr($at_username, 1)] = $user->getPHID();
+      $results[@substr($at_username, 1)] = $user->getPHID();
     }
 
     return $results;
diff --git a/src/applications/phid/type/PhabricatorPHIDType.php b/src/applications/phid/type/PhabricatorPHIDType.php
--- a/src/applications/phid/type/PhabricatorPHIDType.php
+++ b/src/applications/phid/type/PhabricatorPHIDType.php
@@ -5,7 +5,7 @@
   final public function getTypeConstant() {
     $const = $this->getPhobjectClassConstant('TYPECONST');
 
-    if (!is_string($const) || !preg_match('/^[A-Z]{4}$/', $const)) {
+    if (!is_string($const) || !@preg_match('/^[A-Z]{4}$/', $const)) {
       throw new Exception(
         pht(
           '%s class "%s" has an invalid %s property. PHID '.
diff --git a/src/applications/phid/utils.php b/src/applications/phid/utils.php
--- a/src/applications/phid/utils.php
+++ b/src/applications/phid/utils.php
@@ -9,7 +9,7 @@
  */
 function phid_get_type($phid) {
   $matches = null;
-  if (is_string($phid) && preg_match('/^PHID-([^-]{4})-/', $phid, $matches)) {
+  if (is_string($phid) && @preg_match('/^PHID-([^-]{4})-/', $phid, $matches)) {
     return $matches[1];
   }
   return PhabricatorPHIDConstants::PHID_TYPE_UNKNOWN;
@@ -32,7 +32,7 @@
 
 function phid_get_subtype($phid) {
   if (isset($phid[14]) && ($phid[14] == '-')) {
-    return substr($phid, 10, 4);
+    return @substr($phid, 10, 4);
   }
   return null;
 }
diff --git a/src/applications/phid/view/PHUIHandleTagListView.php b/src/applications/phid/view/PHUIHandleTagListView.php
--- a/src/applications/phid/view/PHUIHandleTagListView.php
+++ b/src/applications/phid/view/PHUIHandleTagListView.php
@@ -54,7 +54,7 @@
 
     // If the list is empty, we may render a "No Projects" tag.
     if (!count($handles)) {
-      if (strlen($this->noDataString)) {
+      if (@strlen($this->noDataString)) {
         $no_data_tag = $this->newPlaceholderTag()
           ->setName($this->noDataString);
         return $this->newItem($no_data_tag);
diff --git a/src/applications/phlux/controller/PhluxEditController.php b/src/applications/phlux/controller/PhluxEditController.php
--- a/src/applications/phlux/controller/PhluxEditController.php
+++ b/src/applications/phlux/controller/PhluxEditController.php
@@ -39,10 +39,10 @@
     if ($request->isFormPost()) {
       if ($is_new) {
         $key = $request->getStr('key');
-        if (!strlen($key)) {
+        if (!@strlen($key)) {
           $errors[] = pht('Variable key is required.');
           $e_key = pht('Required');
-        } else if (!preg_match('/^[a-z0-9.-]+\z/', $key)) {
+        } else if (!@preg_match('/^[a-z0-9.-]+\z/', $key)) {
           $errors[] = pht(
             'Variable key "%s" must contain only lowercase letters, digits, '.
             'period, and hyphen.',
@@ -53,7 +53,7 @@
 
       $raw_value = $request->getStr('value');
       $value = json_decode($raw_value, true);
-      if ($value === null && strtolower($raw_value) !== 'null') {
+      if ($value === null && @strtolower($raw_value) !== 'null') {
         $e_value = pht('Invalid');
         $errors[] = pht('Variable value must be valid JSON.');
         $display_value = $raw_value;
diff --git a/src/applications/pholio/controller/PholioImageUploadController.php b/src/applications/pholio/controller/PholioImageUploadController.php
--- a/src/applications/pholio/controller/PholioImageUploadController.php
+++ b/src/applications/pholio/controller/PholioImageUploadController.php
@@ -18,7 +18,7 @@
       return new Aphront404Response();
     }
 
-    if (!strlen($title)) {
+    if (!@strlen($title)) {
       $title = $file->getName();
     }
 
diff --git a/src/applications/pholio/controller/PholioInlineController.php b/src/applications/pholio/controller/PholioInlineController.php
--- a/src/applications/pholio/controller/PholioInlineController.php
+++ b/src/applications/pholio/controller/PholioInlineController.php
@@ -105,7 +105,7 @@
     if ($request->isFormPost()) {
       $v_content = $request->getStr('content');
 
-      if (strlen($v_content)) {
+      if (@strlen($v_content)) {
         $inline->setContent($v_content);
         $inline->save();
         $dictionary = $inline->toDictionary();
diff --git a/src/applications/pholio/controller/PholioMockCommentController.php b/src/applications/pholio/controller/PholioMockCommentController.php
--- a/src/applications/pholio/controller/PholioMockCommentController.php
+++ b/src/applications/pholio/controller/PholioMockCommentController.php
@@ -35,7 +35,7 @@
       $viewer->getPHID(),
       mpull($mock->getActiveImages(), 'getID'));
 
-    if (!$inline_comments || strlen($comment)) {
+    if (!$inline_comments || @strlen($comment)) {
       $xactions[] = id(new PholioTransaction())
         ->setTransactionType(PhabricatorTransactions::TYPE_COMMENT)
         ->attachComment(
diff --git a/src/applications/pholio/controller/PholioMockEditController.php b/src/applications/pholio/controller/PholioMockEditController.php
--- a/src/applications/pholio/controller/PholioMockEditController.php
+++ b/src/applications/pholio/controller/PholioMockEditController.php
@@ -145,7 +145,7 @@
             ->setReplacesImagePHID($replaces_image_phid)
             ->setFilePHID($file_phid)
             ->attachFile($file)
-            ->setName(strlen($title) ? $title : $file->getName())
+            ->setName(@strlen($title) ? $title : $file->getName())
             ->setDescription($description)
             ->setSequence($sequence)
             ->save();
@@ -160,7 +160,7 @@
             ->setAuthorPHID($viewer->getPHID())
             ->setFilePHID($file_phid)
             ->attachFile($file)
-            ->setName(strlen($title) ? $title : $file->getName())
+            ->setName(@strlen($title) ? $title : $file->getName())
             ->setDescription($description)
             ->setSequence($sequence)
             ->save();
diff --git a/src/applications/pholio/controller/PholioMockViewController.php b/src/applications/pholio/controller/PholioMockViewController.php
--- a/src/applications/pholio/controller/PholioMockViewController.php
+++ b/src/applications/pholio/controller/PholioMockViewController.php
@@ -179,7 +179,7 @@
       ->setUser($viewer);
     $description = $mock->getDescription();
 
-    if (strlen($description)) {
+    if (@strlen($description)) {
       $properties->addTextContent(
         new PHUIRemarkupView($viewer, $description));
       return id(new PHUIObjectBoxView())
diff --git a/src/applications/pholio/mail/PholioMockMailReceiver.php b/src/applications/pholio/mail/PholioMockMailReceiver.php
--- a/src/applications/pholio/mail/PholioMockMailReceiver.php
+++ b/src/applications/pholio/mail/PholioMockMailReceiver.php
@@ -12,7 +12,7 @@
   }
 
   protected function loadObject($pattern, PhabricatorUser $viewer) {
-    $id = (int)substr($pattern, 1);
+    $id = (int)@substr($pattern, 1);
 
     return id(new PholioMockQuery())
       ->setViewer($viewer)
diff --git a/src/applications/pholio/phid/PholioMockPHIDType.php b/src/applications/pholio/phid/PholioMockPHIDType.php
--- a/src/applications/pholio/phid/PholioMockPHIDType.php
+++ b/src/applications/pholio/phid/PholioMockPHIDType.php
@@ -46,7 +46,7 @@
   }
 
   public function canLoadNamedObject($name) {
-    return preg_match('/^M\d*[1-9]\d*$/i', $name);
+    return @preg_match('/^M\d*[1-9]\d*$/i', $name);
   }
 
   public function loadNamedObjects(
@@ -55,7 +55,7 @@
 
     $id_map = array();
     foreach ($names as $name) {
-      $id = (int)substr($name, 1);
+      $id = (int)@substr($name, 1);
       $id_map[$id][] = $name;
     }
 
diff --git a/src/applications/pholio/remarkup/PholioRemarkupRule.php b/src/applications/pholio/remarkup/PholioRemarkupRule.php
--- a/src/applications/pholio/remarkup/PholioRemarkupRule.php
+++ b/src/applications/pholio/remarkup/PholioRemarkupRule.php
@@ -20,7 +20,7 @@
     $href = $handle->getURI();
 
     // If the ID has a `M123/456` component, link to that specific image.
-    $id = explode('/', $id);
+    $id = @explode('/', $id);
     if (isset($id[1])) {
       $href = $href.'/'.$id[1].'/';
     }
@@ -36,7 +36,7 @@
     // Strip off any image ID components of the URI.
     $map = array();
     foreach ($ids as $id) {
-      $map[head(explode('/', $id))][] = $id;
+      $map[head(@explode('/', $id))][] = $id;
     }
 
     $viewer = $this->getEngine()->getConfig('viewer');
@@ -70,13 +70,13 @@
       ->setUser($viewer)
       ->setMock($object);
 
-    if (strlen($options)) {
+    if (@strlen($options)) {
       $parser = new PhutilSimpleOptions();
-      $opts = $parser->parse(substr($options, 1));
+      $opts = $parser->parse(@substr($options, 1));
 
       if (isset($opts['image'])) {
         $images = array_unique(
-          explode('&', preg_replace('/\s+/', '', $opts['image'])));
+          @explode('&', preg_replace('/\s+/', '', $opts['image'])));
 
         $embed_mock->setImages($images);
       }
diff --git a/src/applications/pholio/view/PholioMockImagesView.php b/src/applications/pholio/view/PholioMockImagesView.php
--- a/src/applications/pholio/view/PholioMockImagesView.php
+++ b/src/applications/pholio/view/PholioMockImagesView.php
@@ -86,7 +86,7 @@
       }
 
       $description = $image->getDescription();
-      if (strlen($description)) {
+      if (@strlen($description)) {
         $description = new PHUIRemarkupView($viewer, $description);
       }
 
diff --git a/src/applications/pholio/xaction/PholioImageNameTransaction.php b/src/applications/pholio/xaction/PholioImageNameTransaction.php
--- a/src/applications/pholio/xaction/PholioImageNameTransaction.php
+++ b/src/applications/pholio/xaction/PholioImageNameTransaction.php
@@ -69,7 +69,7 @@
     $max_length = $object->getColumnMaximumByteLength('name');
     foreach ($xactions as $xaction) {
       $new_value = head(array_values($xaction->getNewValue()));
-      $new_length = strlen($new_value);
+      $new_length = @strlen($new_value);
       if ($new_length > $max_length) {
         $errors[] = $this->newInvalidError(
           pht(
diff --git a/src/applications/pholio/xaction/PholioMockNameTransaction.php b/src/applications/pholio/xaction/PholioMockNameTransaction.php
--- a/src/applications/pholio/xaction/PholioMockNameTransaction.php
+++ b/src/applications/pholio/xaction/PholioMockNameTransaction.php
@@ -74,7 +74,7 @@
     $max_length = $object->getColumnMaximumByteLength('name');
     foreach ($xactions as $xaction) {
       $new_value = $xaction->getNewValue();
-      $new_length = strlen($new_value);
+      $new_length = @strlen($new_value);
       if ($new_length > $max_length) {
         $errors[] = $this->newInvalidError(
           pht(
diff --git a/src/applications/phortune/controller/account/PhortuneAccountDetailsController.php b/src/applications/phortune/controller/account/PhortuneAccountDetailsController.php
--- a/src/applications/phortune/controller/account/PhortuneAccountDetailsController.php
+++ b/src/applications/phortune/controller/account/PhortuneAccountDetailsController.php
@@ -132,12 +132,12 @@
     $view->addProperty(pht('Account Name'), $account->getName());
 
     $display_name = $account->getBillingName();
-    if (!strlen($display_name)) {
+    if (!@strlen($display_name)) {
       $display_name = phutil_tag('em', array(), pht('None'));
     }
 
     $display_address = $account->getBillingAddress();
-    if (!strlen($display_address)) {
+    if (!@strlen($display_address)) {
       $display_address = phutil_tag('em', array(), pht('None'));
     } else {
       $display_address = phutil_escape_html_newlines($display_address);
diff --git a/src/applications/phortune/controller/account/PhortuneAccountEmailViewController.php b/src/applications/phortune/controller/account/PhortuneAccountEmailViewController.php
--- a/src/applications/phortune/controller/account/PhortuneAccountEmailViewController.php
+++ b/src/applications/phortune/controller/account/PhortuneAccountEmailViewController.php
@@ -158,10 +158,10 @@
     // Key" actually does something.
 
     $prefix_length = 4;
-    $visible_part = substr($access_key, 0, $prefix_length);
+    $visible_part = @substr($access_key, 0, $prefix_length);
     $masked_part = str_repeat(
       "\xE2\x80\xA2",
-      strlen($access_key) - $prefix_length);
+      @strlen($access_key) - $prefix_length);
     $access_display = $visible_part.$masked_part;
     $access_display = phutil_tag('tt', array(), $access_display);
 
diff --git a/src/applications/phortune/controller/account/PhortuneAccountPaymentMethodViewController.php b/src/applications/phortune/controller/account/PhortuneAccountPaymentMethodViewController.php
--- a/src/applications/phortune/controller/account/PhortuneAccountPaymentMethodViewController.php
+++ b/src/applications/phortune/controller/account/PhortuneAccountPaymentMethodViewController.php
@@ -110,7 +110,7 @@
     $view = id(new PHUIPropertyListView())
       ->setUser($viewer);
 
-    if (strlen($method->getName())) {
+    if (@strlen($method->getName())) {
       $view->addProperty(pht('Name'), $method->getDisplayName());
     }
 
diff --git a/src/applications/phortune/controller/merchant/PhortuneMerchantDetailsController.php b/src/applications/phortune/controller/merchant/PhortuneMerchantDetailsController.php
--- a/src/applications/phortune/controller/merchant/PhortuneMerchantDetailsController.php
+++ b/src/applications/phortune/controller/merchant/PhortuneMerchantDetailsController.php
@@ -63,7 +63,7 @@
     $view->addProperty(pht('Invoice From'), $invoice_from);
 
     $description = $merchant->getDescription();
-    if (strlen($description)) {
+    if (@strlen($description)) {
       $description = new PHUIRemarkupView($viewer, $description);
       $view->addSectionHeader(
         pht('Description'),
@@ -72,7 +72,7 @@
     }
 
     $contact_info = $merchant->getContactInfo();
-    if (strlen($contact_info)) {
+    if (@strlen($contact_info)) {
       $contact_info = new PHUIRemarkupView($viewer, $contact_info);
       $view->addSectionHeader(
         pht('Contact Information'),
@@ -81,7 +81,7 @@
     }
 
     $footer_info = $merchant->getInvoiceFooter();
-    if (strlen($footer_info)) {
+    if (@strlen($footer_info)) {
       $footer_info = new PHUIRemarkupView($viewer, $footer_info);
       $view->addSectionHeader(
         pht('Invoice Footer'),
diff --git a/src/applications/phortune/controller/merchant/PhortuneMerchantInvoiceCreateController.php b/src/applications/phortune/controller/merchant/PhortuneMerchantInvoiceCreateController.php
--- a/src/applications/phortune/controller/merchant/PhortuneMerchantInvoiceCreateController.php
+++ b/src/applications/phortune/controller/merchant/PhortuneMerchantInvoiceCreateController.php
@@ -122,17 +122,17 @@
       $e_cost = null;
       $e_quantity = null;
 
-      if (!strlen($v_title)) {
+      if (!@strlen($v_title)) {
         $e_title = pht('Required');
         $errors[] = pht('You must title this invoice.');
       }
 
-      if (!strlen($v_name)) {
+      if (!@strlen($v_name)) {
         $e_name = pht('Required');
         $errors[] = pht('You must provide a name for this purchase.');
       }
 
-      if (!strlen($v_cost)) {
+      if (!@strlen($v_cost)) {
         $e_cost = pht('Required');
         $errors[] = pht('You must provide a cost for this purchase.');
       } else {
diff --git a/src/applications/phortune/controller/merchant/PhortuneMerchantOverviewController.php b/src/applications/phortune/controller/merchant/PhortuneMerchantOverviewController.php
--- a/src/applications/phortune/controller/merchant/PhortuneMerchantOverviewController.php
+++ b/src/applications/phortune/controller/merchant/PhortuneMerchantOverviewController.php
@@ -110,7 +110,7 @@
     $view->addProperty(pht('Status'), $status_view);
 
     $description = $merchant->getDescription();
-    if (strlen($description)) {
+    if (@strlen($description)) {
       $description = new PHUIRemarkupView($viewer, $description);
       $view->addSectionHeader(
         pht('Description'),
@@ -119,7 +119,7 @@
     }
 
     $contact_info = $merchant->getContactInfo();
-    if (strlen($contact_info)) {
+    if (@strlen($contact_info)) {
       $contact_info = new PHUIRemarkupView($viewer, $contact_info);
       $view->addSectionHeader(
         pht('Contact Information'),
diff --git a/src/applications/phortune/currency/PhortuneCurrency.php b/src/applications/phortune/currency/PhortuneCurrency.php
--- a/src/applications/phortune/currency/PhortuneCurrency.php
+++ b/src/applications/phortune/currency/PhortuneCurrency.php
@@ -24,7 +24,7 @@
 
   public static function newFromString($string, $default = null) {
     $matches = null;
-    $ok = preg_match(
+    $ok = @preg_match(
       '/^([-$]*(?:\d+)?(?:[.]\d{0,2})?)(?:\s+([A-Z]+))?$/',
       trim($string),
       $matches);
diff --git a/src/applications/phortune/editor/PhortuneCartEditor.php b/src/applications/phortune/editor/PhortuneCartEditor.php
--- a/src/applications/phortune/editor/PhortuneCartEditor.php
+++ b/src/applications/phortune/editor/PhortuneCartEditor.php
@@ -302,7 +302,7 @@
 
     $origin_username = $origin_user->getUsername();
     $origin_realname = $origin_user->getRealName();
-    if (strlen($origin_realname)) {
+    if (@strlen($origin_realname)) {
       $origin_display = pht('%s (%s)', $origin_username, $origin_realname);
     } else {
       $origin_display = pht('%s', $origin_username);
diff --git a/src/applications/phortune/pdf/PhabricatorPDFIterator.php b/src/applications/phortune/pdf/PhabricatorPDFIterator.php
--- a/src/applications/phortune/pdf/PhabricatorPDFIterator.php
+++ b/src/applications/phortune/pdf/PhabricatorPDFIterator.php
@@ -64,7 +64,7 @@
     $bytes = $fragment->getAsBytes();
 
     $this->fragmentBytes = $bytes;
-    $this->byteLength += strlen($bytes);
+    $this->byteLength += @strlen($bytes);
   }
 
   public function rewind() {
diff --git a/src/applications/phortune/pdf/PhabricatorPDFObject.php b/src/applications/phortune/pdf/PhabricatorPDFObject.php
--- a/src/applications/phortune/pdf/PhabricatorPDFObject.php
+++ b/src/applications/phortune/pdf/PhabricatorPDFObject.php
@@ -89,7 +89,7 @@
 
     $this->streams[] = $stream_data;
 
-    return strlen($stream_data);
+    return @strlen($stream_data);
   }
 
 }
diff --git a/src/applications/phortune/provider/PhortunePayPalPaymentProvider.php b/src/applications/phortune/provider/PhortunePayPalPaymentProvider.php
--- a/src/applications/phortune/provider/PhortunePayPalPaymentProvider.php
+++ b/src/applications/phortune/provider/PhortunePayPalPaymentProvider.php
@@ -69,22 +69,22 @@
     $errors = array();
     $issues = array();
 
-    if (!strlen($values[self::PAYPAL_API_USERNAME])) {
+    if (!@strlen($values[self::PAYPAL_API_USERNAME])) {
       $errors[] = pht('PayPal API Username is required.');
       $issues[self::PAYPAL_API_USERNAME] = pht('Required');
     }
 
-    if (!strlen($values[self::PAYPAL_API_PASSWORD])) {
+    if (!@strlen($values[self::PAYPAL_API_PASSWORD])) {
       $errors[] = pht('PayPal API Password is required.');
       $issues[self::PAYPAL_API_PASSWORD] = pht('Required');
     }
 
-    if (!strlen($values[self::PAYPAL_API_SIGNATURE])) {
+    if (!@strlen($values[self::PAYPAL_API_SIGNATURE])) {
       $errors[] = pht('PayPal API Signature is required.');
       $issues[self::PAYPAL_API_SIGNATURE] = pht('Required');
     }
 
-    if (!strlen($values[self::PAYPAL_MODE])) {
+    if (!@strlen($values[self::PAYPAL_MODE])) {
       $errors[] = pht('Mode is required.');
       $issues[self::PAYPAL_MODE] = pht('Required');
     }
diff --git a/src/applications/phortune/provider/PhortunePaymentProvider.php b/src/applications/phortune/provider/PhortunePaymentProvider.php
--- a/src/applications/phortune/provider/PhortunePaymentProvider.php
+++ b/src/applications/phortune/provider/PhortunePaymentProvider.php
@@ -96,14 +96,14 @@
     array $issues);
 
   protected function renderConfigurationSecret($value) {
-    if (strlen($value)) {
-      return str_repeat('*', strlen($value));
+    if (@strlen($value)) {
+      return str_repeat('*', @strlen($value));
     }
     return '';
   }
 
   public function isConfigurationSecret($value) {
-    return preg_match('/^\*+\z/', trim($value));
+    return @preg_match('/^\*+\z/', trim($value));
   }
 
   abstract public function canRunConfigurationTest();
diff --git a/src/applications/phortune/provider/PhortuneStripePaymentProvider.php b/src/applications/phortune/provider/PhortuneStripePaymentProvider.php
--- a/src/applications/phortune/provider/PhortuneStripePaymentProvider.php
+++ b/src/applications/phortune/provider/PhortuneStripePaymentProvider.php
@@ -6,7 +6,7 @@
   const STRIPE_SECRET_KEY       = 'stripe.secret-key';
 
   public function isAcceptingLivePayments() {
-    return preg_match('/_live_/', $this->getPublishableKey());
+    return @preg_match('/_live_/', $this->getPublishableKey());
   }
 
   public function getName() {
@@ -64,12 +64,12 @@
     $errors = array();
     $issues = array();
 
-    if (!strlen($values[self::STRIPE_SECRET_KEY])) {
+    if (!@strlen($values[self::STRIPE_SECRET_KEY])) {
       $errors[] = pht('Stripe Secret Key is required.');
       $issues[self::STRIPE_SECRET_KEY] = pht('Required');
     }
 
-    if (!strlen($values[self::STRIPE_PUBLISHABLE_KEY])) {
+    if (!@strlen($values[self::STRIPE_PUBLISHABLE_KEY])) {
       $errors[] = pht('Stripe Publishable Key is required.');
       $issues[self::STRIPE_PUBLISHABLE_KEY] = pht('Required');
     }
@@ -304,10 +304,10 @@
 
   private function getStripeShortErrorCode($error_code) {
     $prefix = 'cc:stripe:';
-    if (strncmp($error_code, $prefix, strlen($prefix))) {
+    if (strncmp($error_code, $prefix, @strlen($prefix))) {
       return null;
     }
-    return substr($error_code, strlen($prefix));
+    return @substr($error_code, @strlen($prefix));
   }
 
   public function validateCreatePaymentMethodToken(array $token) {
@@ -426,7 +426,7 @@
     );
 
     $param = idx($map, 'param');
-    if (strlen($param)) {
+    if (@strlen($param)) {
       $rows[] = array(
         pht('Error Param'),
         $param,
@@ -434,7 +434,7 @@
     }
 
     $decline_code = idx($map, 'decline_code');
-    if (strlen($decline_code)) {
+    if (@strlen($decline_code)) {
       $rows[] = array(
         pht('Decline Code'),
         $decline_code,
diff --git a/src/applications/phortune/storage/PhortunePaymentMethod.php b/src/applications/phortune/storage/PhortunePaymentMethod.php
--- a/src/applications/phortune/storage/PhortunePaymentMethod.php
+++ b/src/applications/phortune/storage/PhortunePaymentMethod.php
@@ -109,7 +109,7 @@
   }
 
   public function getDisplayName() {
-    if (strlen($this->name)) {
+    if (@strlen($this->name)) {
       return $this->name;
     }
 
@@ -131,9 +131,9 @@
   }
 
   public function getDisplayExpires() {
-    list($year, $month) = explode('-', $this->getExpires());
+    list($year, $month) = @explode('-', $this->getExpires());
     $month = sprintf('%02d', $month);
-    $year = substr($year, -2);
+    $year = @substr($year, -2);
     return $month.'/'.$year;
   }
 
diff --git a/src/applications/phortune/view/PhortuneOrderDescriptionView.php b/src/applications/phortune/view/PhortuneOrderDescriptionView.php
--- a/src/applications/phortune/view/PhortuneOrderDescriptionView.php
+++ b/src/applications/phortune/view/PhortuneOrderDescriptionView.php
@@ -19,7 +19,7 @@
     $order = $this->getOrder();
 
     $description = $order->getDescription();
-    if (!strlen($description)) {
+    if (!@strlen($description)) {
       return null;
     }
 
diff --git a/src/applications/phortune/view/PhortuneOrderSummaryView.php b/src/applications/phortune/view/PhortuneOrderSummaryView.php
--- a/src/applications/phortune/view/PhortuneOrderSummaryView.php
+++ b/src/applications/phortune/view/PhortuneOrderSummaryView.php
@@ -261,14 +261,14 @@
     $account_name = $account->getBillingName();
 
     $account_contact = $account->getBillingAddress();
-    if (strlen($account_contact)) {
+    if (@strlen($account_contact)) {
       $account_contact = new PHUIRemarkupView(
         $viewer,
         $account_contact);
     }
 
     $merchant_contact = $merchant->getContactInfo();
-    if (strlen($merchant_contact)) {
+    if (@strlen($merchant_contact)) {
       $merchant_contact = new PHUIRemarkupView(
         $viewer,
         $merchant->getContactInfo());
@@ -355,7 +355,7 @@
     $merchant = $order->getMerchant();
     $footer = $merchant->getInvoiceFooter();
 
-    if (!strlen($footer)) {
+    if (!@strlen($footer)) {
       return null;
     }
 
diff --git a/src/applications/phortune/xaction/PhortuneAccountBillingNameTransaction.php b/src/applications/phortune/xaction/PhortuneAccountBillingNameTransaction.php
--- a/src/applications/phortune/xaction/PhortuneAccountBillingNameTransaction.php
+++ b/src/applications/phortune/xaction/PhortuneAccountBillingNameTransaction.php
@@ -17,13 +17,13 @@
     $old = $this->getOldValue();
     $new = $this->getNewValue();
 
-    if (strlen($old) && strlen($new)) {
+    if (@strlen($old) && @strlen($new)) {
       return pht(
         '%s changed the billing name for this account from %s to %s.',
         $this->renderAuthor(),
         $this->renderOldValue(),
         $this->renderNewValue());
-    } else if (strlen($old)) {
+    } else if (@strlen($old)) {
       return pht(
         '%s removed the billing name for this account (was %s).',
         $this->renderAuthor(),
@@ -42,7 +42,7 @@
     $max_length = $object->getColumnMaximumByteLength('billingName');
     foreach ($xactions as $xaction) {
       $new_value = $xaction->getNewValue();
-      $new_length = strlen($new_value);
+      $new_length = @strlen($new_value);
       if ($new_length > $max_length) {
         $errors[] = $this->newRequiredError(
           pht('The billing name can be no longer than %s characters.',
diff --git a/src/applications/phortune/xaction/PhortuneAccountEmailAddressTransaction.php b/src/applications/phortune/xaction/PhortuneAccountEmailAddressTransaction.php
--- a/src/applications/phortune/xaction/PhortuneAccountEmailAddressTransaction.php
+++ b/src/applications/phortune/xaction/PhortuneAccountEmailAddressTransaction.php
@@ -26,7 +26,7 @@
       $old_value = $xaction->getOldValue();
       $new_value = $xaction->getNewValue();
 
-      $new_length = strlen($new_value);
+      $new_length = @strlen($new_value);
       if ($new_length > $max_length) {
         $errors[] = $this->newInvalidError(
           pht(
diff --git a/src/applications/phortune/xaction/PhortuneAccountNameTransaction.php b/src/applications/phortune/xaction/PhortuneAccountNameTransaction.php
--- a/src/applications/phortune/xaction/PhortuneAccountNameTransaction.php
+++ b/src/applications/phortune/xaction/PhortuneAccountNameTransaction.php
@@ -17,7 +17,7 @@
     $old = $this->getOldValue();
     $new = $this->getNewValue();
 
-    if (strlen($old) && strlen($new)) {
+    if (@strlen($old) && @strlen($new)) {
       return pht(
         '%s renamed this account from %s to %s.',
         $this->renderAuthor(),
@@ -41,7 +41,7 @@
     $max_length = $object->getColumnMaximumByteLength('name');
     foreach ($xactions as $xaction) {
       $new_value = $xaction->getNewValue();
-      $new_length = strlen($new_value);
+      $new_length = @strlen($new_value);
       if ($new_length > $max_length) {
         $errors[] = $this->newRequiredError(
           pht('The name can be no longer than %s characters.',
diff --git a/src/applications/phortune/xaction/PhortuneMerchantInvoiceEmailTransaction.php b/src/applications/phortune/xaction/PhortuneMerchantInvoiceEmailTransaction.php
--- a/src/applications/phortune/xaction/PhortuneMerchantInvoiceEmailTransaction.php
+++ b/src/applications/phortune/xaction/PhortuneMerchantInvoiceEmailTransaction.php
@@ -17,13 +17,13 @@
     $old = $this->getOldValue();
     $new = $this->getNewValue();
 
-    if (strlen($old) && strlen($new)) {
+    if (@strlen($old) && @strlen($new)) {
       return pht(
         '%s updated the invoice email from %s to %s.',
         $this->renderAuthor(),
         $this->renderOldValue(),
         $this->renderNewValue());
-    } else if (strlen($old)) {
+    } else if (@strlen($old)) {
       return pht(
         '%s removed the invoice email.',
         $this->renderAuthor());
@@ -39,14 +39,14 @@
     $old = $this->getOldValue();
     $new = $this->getNewValue();
 
-    if (strlen($old) && strlen($new)) {
+    if (@strlen($old) && @strlen($new)) {
       return pht(
         '%s updated %s invoice email from %s to %s.',
         $this->renderAuthor(),
         $this->renderObject(),
         $this->renderOldValue(),
         $this->renderNewValue());
-    } else if (strlen($old)) {
+    } else if (@strlen($old)) {
       return pht(
         '%s removed the invoice email for %s.',
         $this->renderAuthor(),
@@ -69,17 +69,17 @@
 
     $max_length = $object->getColumnMaximumByteLength('invoiceEmail');
     foreach ($xactions as $xaction) {
-      if (strlen($xaction->getNewValue())) {
+      if (@strlen($xaction->getNewValue())) {
         $email = new PhutilEmailAddress($xaction->getNewValue());
         $domain = $email->getDomainName();
-        if (!strlen($domain)) {
+        if (!@strlen($domain)) {
           $errors[] = $this->newInvalidError(
             pht('Invoice email "%s" must be a valid email.',
             $xaction->getNewValue()));
         }
 
         $new_value = $xaction->getNewValue();
-        $new_length = strlen($new_value);
+        $new_length = @strlen($new_value);
         if ($new_length > $max_length) {
           $errors[] = $this->newInvalidError(
             pht('The email can be no longer than %s characters.',
diff --git a/src/applications/phortune/xaction/PhortuneMerchantNameTransaction.php b/src/applications/phortune/xaction/PhortuneMerchantNameTransaction.php
--- a/src/applications/phortune/xaction/PhortuneMerchantNameTransaction.php
+++ b/src/applications/phortune/xaction/PhortuneMerchantNameTransaction.php
@@ -41,7 +41,7 @@
     $max_length = $object->getColumnMaximumByteLength('name');
     foreach ($xactions as $xaction) {
       $new_value = $xaction->getNewValue();
-      $new_length = strlen($new_value);
+      $new_length = @strlen($new_value);
       if ($new_length > $max_length) {
         $errors[] = $this->newInvalidError(
           pht('The name can be no longer than %s characters.',
diff --git a/src/applications/phortune/xaction/paymentmethod/PhortunePaymentMethodNameTransaction.php b/src/applications/phortune/xaction/paymentmethod/PhortunePaymentMethodNameTransaction.php
--- a/src/applications/phortune/xaction/paymentmethod/PhortunePaymentMethodNameTransaction.php
+++ b/src/applications/phortune/xaction/paymentmethod/PhortunePaymentMethodNameTransaction.php
@@ -17,13 +17,13 @@
     $old_value = $this->getOldValue();
     $new_value = $this->getNewValue();
 
-    if (strlen($old_value) && strlen($new_value)) {
+    if (@strlen($old_value) && @strlen($new_value)) {
       return pht(
         '%s renamed this payment method from %s to %s.',
         $this->renderAuthor(),
         $this->renderOldValue(),
         $this->renderNewValue());
-    } else if (strlen($new_value)) {
+    } else if (@strlen($new_value)) {
       return pht(
         '%s set the name of this payment method to %s.',
         $this->renderAuthor(),
diff --git a/src/applications/phragment/conduit/PhragmentGetPatchConduitAPIMethod.php b/src/applications/phragment/conduit/PhragmentGetPatchConduitAPIMethod.php
--- a/src/applications/phragment/conduit/PhragmentGetPatchConduitAPIMethod.php
+++ b/src/applications/phragment/conduit/PhragmentGetPatchConduitAPIMethod.php
@@ -70,7 +70,7 @@
         if ($file_phid !== null) {
           // If the file PHID is present, then we need to check the
           // hashes to see if they are the same.
-          $hash_caller = strtolower($state[$path]);
+          $hash_caller = @strtolower($state[$path]);
           $hash_current = $files[$file_phid]->getContentHash();
           if ($hash_caller === $hash_current) {
             // The user's version is identical to our version, so
diff --git a/src/applications/phragment/conduit/PhragmentQueryFragmentsConduitAPIMethod.php b/src/applications/phragment/conduit/PhragmentQueryFragmentsConduitAPIMethod.php
--- a/src/applications/phragment/conduit/PhragmentQueryFragmentsConduitAPIMethod.php
+++ b/src/applications/phragment/conduit/PhragmentQueryFragmentsConduitAPIMethod.php
@@ -67,7 +67,7 @@
         }
 
         $file = $files[$file_phid];
-        $cpath = substr($child->getPath(), strlen($fragment->getPath()) + 1);
+        $cpath = @substr($child->getPath(), @strlen($fragment->getPath()) + 1);
         $result[] = array(
           'phid' => $child->getPHID(),
           'phidVersion' => $child->getLatestVersionPHID(),
diff --git a/src/applications/phragment/controller/PhragmentController.php b/src/applications/phragment/controller/PhragmentController.php
--- a/src/applications/phragment/controller/PhragmentController.php
+++ b/src/applications/phragment/controller/PhragmentController.php
@@ -3,7 +3,7 @@
 abstract class PhragmentController extends PhabricatorController {
 
   protected function loadParentFragments($path) {
-    $components = explode('/', $path);
+    $components = @explode('/', $path);
 
     $combinations = array();
     $current = '';
diff --git a/src/applications/phragment/controller/PhragmentCreateController.php b/src/applications/phragment/controller/PhragmentCreateController.php
--- a/src/applications/phragment/controller/PhragmentCreateController.php
+++ b/src/applications/phragment/controller/PhragmentCreateController.php
@@ -33,7 +33,7 @@
       $v_viewpolicy = $request->getStr('viewPolicy');
       $v_editpolicy = $request->getStr('editPolicy');
 
-      if (strpos($v_name, '/') !== false) {
+      if (@strpos($v_name, '/') !== false) {
         $errors[] = pht("The fragment name can not contain '/'.");
       }
 
diff --git a/src/applications/phragment/controller/PhragmentSnapshotCreateController.php b/src/applications/phragment/controller/PhragmentSnapshotCreateController.php
--- a/src/applications/phragment/controller/PhragmentSnapshotCreateController.php
+++ b/src/applications/phragment/controller/PhragmentSnapshotCreateController.php
@@ -30,10 +30,10 @@
     if ($request->isFormPost()) {
 
       $v_name = $request->getStr('name');
-      if (strlen($v_name) === 0) {
+      if (@strlen($v_name) === 0) {
         $errors[] = pht('You must specify a name.');
       }
-      if (strpos($v_name, '/') !== false) {
+      if (@strpos($v_name, '/') !== false) {
         $errors[] = pht('Snapshot names can not contain "/".');
       }
 
diff --git a/src/applications/phragment/controller/PhragmentZIPController.php b/src/applications/phragment/controller/PhragmentZIPController.php
--- a/src/applications/phragment/controller/PhragmentZIPController.php
+++ b/src/applications/phragment/controller/PhragmentZIPController.php
@@ -95,7 +95,7 @@
     $zip->close();
 
     $zip_name = $fragment->getName();
-    if (substr($zip_name, -4) !== '.zip') {
+    if (@substr($zip_name, -4) !== '.zip') {
       $zip_name .= '.zip';
     }
 
diff --git a/src/applications/phragment/storage/PhragmentFragment.php b/src/applications/phragment/storage/PhragmentFragment.php
--- a/src/applications/phragment/storage/PhragmentFragment.php
+++ b/src/applications/phragment/storage/PhragmentFragment.php
@@ -85,7 +85,7 @@
 
     $fragment = id(new PhragmentFragment());
     $fragment->setPath($path);
-    $fragment->setDepth(count(explode('/', $path)));
+    $fragment->setDepth(count(@explode('/', $path)));
     $fragment->setLatestVersionPHID(null);
     $fragment->setViewPolicy($view_policy);
     $fragment->setEditPolicy($edit_policy);
@@ -228,7 +228,7 @@
 
     // Iterate over the existing fragments.
     foreach ($children as $full_path => $child) {
-      $path = substr($full_path, strlen($base_path) + 1);
+      $path = @substr($full_path, @strlen($base_path) + 1);
       if (array_key_exists($path, $mappings)) {
         if ($child->isDirectory() && $mappings[$path] === null) {
           // Don't create a version entry for a directory
@@ -306,7 +306,7 @@
       ->execute();
 
     if (count($children) === 0) {
-      $path = substr($this->getPath(), strlen($base_path) + 1);
+      $path = @substr($this->getPath(), @strlen($base_path) + 1);
       return array($path => $this);
     } else {
       $mappings = array();
diff --git a/src/applications/phriction/conduit/PhrictionCreateConduitAPIMethod.php b/src/applications/phriction/conduit/PhrictionCreateConduitAPIMethod.php
--- a/src/applications/phriction/conduit/PhrictionCreateConduitAPIMethod.php
+++ b/src/applications/phriction/conduit/PhrictionCreateConduitAPIMethod.php
@@ -25,7 +25,7 @@
 
   protected function execute(ConduitAPIRequest $request) {
     $slug = $request->getValue('slug');
-    if (!strlen($slug)) {
+    if (!@strlen($slug)) {
       throw new Exception(pht('No such document.'));
     }
     $doc = id(new PhrictionDocumentQuery())
diff --git a/src/applications/phriction/controller/PhrictionDiffController.php b/src/applications/phriction/controller/PhrictionDiffController.php
--- a/src/applications/phriction/controller/PhrictionDiffController.php
+++ b/src/applications/phriction/controller/PhrictionDiffController.php
@@ -26,7 +26,7 @@
 
     $ref = $request->getStr('ref');
     if ($ref) {
-      list($l, $r) = explode(',', $ref);
+      list($l, $r) = @explode(',', $ref);
     }
 
     $content = id(new PhrictionContentQuery())
diff --git a/src/applications/phriction/controller/PhrictionHistoryController.php b/src/applications/phriction/controller/PhrictionHistoryController.php
--- a/src/applications/phriction/controller/PhrictionHistoryController.php
+++ b/src/applications/phriction/controller/PhrictionHistoryController.php
@@ -90,7 +90,7 @@
         ->setStatusIcon($icon.' '.$color);
 
       $description = $content->getDescription();
-      if (strlen($description)) {
+      if (@strlen($description)) {
         $item->addAttribute($description);
       }
 
diff --git a/src/applications/phriction/controller/PhrictionMoveController.php b/src/applications/phriction/controller/PhrictionMoveController.php
--- a/src/applications/phriction/controller/PhrictionMoveController.php
+++ b/src/applications/phriction/controller/PhrictionMoveController.php
@@ -35,7 +35,7 @@
 
       // If what the user typed isn't what we're actually using, warn them
       // about it.
-      if (strlen($v_slug)) {
+      if (@strlen($v_slug)) {
         $no_slash_slug = rtrim($normal_slug, '/');
         if ($normal_slug !== $v_slug && $no_slash_slug !== $v_slug) {
           return $this->newDialog()
diff --git a/src/applications/phriction/editor/PhrictionTransactionEditor.php b/src/applications/phriction/editor/PhrictionTransactionEditor.php
--- a/src/applications/phriction/editor/PhrictionTransactionEditor.php
+++ b/src/applications/phriction/editor/PhrictionTransactionEditor.php
@@ -307,7 +307,7 @@
     }
 
     $description = $object->getContent()->getDescription();
-    if (strlen($description)) {
+    if (@strlen($description)) {
       $body->addTextSection(
         pht('EDIT NOTES'),
         $description);
@@ -556,7 +556,7 @@
       ->setContent($this->getOldContent()->getContent())
       ->setDescription('');
 
-    if (strlen($this->getDescription())) {
+    if (@strlen($this->getDescription())) {
       $content->setDescription($this->getDescription());
     }
 
diff --git a/src/applications/phriction/engineextension/PhrictionDatasourceEngineExtension.php b/src/applications/phriction/engineextension/PhrictionDatasourceEngineExtension.php
--- a/src/applications/phriction/engineextension/PhrictionDatasourceEngineExtension.php
+++ b/src/applications/phriction/engineextension/PhrictionDatasourceEngineExtension.php
@@ -13,13 +13,13 @@
     $viewer = $this->getViewer();
 
     // Send "w" to Phriction.
-    if (preg_match('/^w\z/i', $query)) {
+    if (@preg_match('/^w\z/i', $query)) {
       return '/w/';
     }
 
     // Send "w <string>" to a search for similar wiki documents.
     $matches = null;
-    if (preg_match('/^w\s+(.+)\z/i', $query, $matches)) {
+    if (@preg_match('/^w\s+(.+)\z/i', $query, $matches)) {
       $raw_query = $matches[1];
 
       $engine = id(new PhrictionDocument())
diff --git a/src/applications/phriction/markup/PhrictionRemarkupRule.php b/src/applications/phriction/markup/PhrictionRemarkupRule.php
--- a/src/applications/phriction/markup/PhrictionRemarkupRule.php
+++ b/src/applications/phriction/markup/PhrictionRemarkupRule.php
@@ -32,7 +32,7 @@
     }
 
     // If the link contains an anchor, separate that off first.
-    $parts = explode('#', $path, 2);
+    $parts = @explode('#', $path, 2);
     if (count($parts) == 2) {
       $link = $parts[0];
       $anchor = $parts[1];
@@ -42,11 +42,11 @@
     }
 
     // Handle relative links.
-    if ((substr($link, 0, 2) === './') || (substr($link, 0, 3) === '../')) {
+    if ((@substr($link, 0, 2) === './') || (@substr($link, 0, 3) === '../')) {
       $base = $this->getRelativeBaseURI();
       if ($base !== null) {
-        $base_parts = explode('/', rtrim($base, '/'));
-        $rel_parts = explode('/', rtrim($link, '/'));
+        $base_parts = @explode('/', rtrim($base, '/'));
+        $rel_parts = @explode('/', rtrim($link, '/'));
         foreach ($rel_parts as $part) {
           if ($part === '.') {
             // Consume standalone dots in a relative path, and do
@@ -191,21 +191,21 @@
 
       // If the name is something meaningful to humans, we'll render this
       // in text as: "Title" <link>. Otherwise, we'll just render: <link>.
-      $is_interesting_name = (bool)strlen($name);
+      $is_interesting_name = (bool)@strlen($name);
 
       $target = idx($document_map, $key, null);
 
       if ($target === null) {
         // The target document doesn't exist.
         if ($name === null) {
-          $name = explode('/', trim($link, '/'));
+          $name = @explode('/', trim($link, '/'));
           $name = end($name);
         }
         $class = 'phriction-link-missing';
       } else if (!$target['visible']) {
         // The document exists, but the user can't see it.
         if ($name === null) {
-          $name = explode('/', trim($link, '/'));
+          $name = @explode('/', trim($link, '/'));
           $name = end($name);
         }
         $class = 'phriction-link-lock';
diff --git a/src/applications/phurl/controller/PhabricatorPhurlURLViewController.php b/src/applications/phurl/controller/PhabricatorPhurlURLViewController.php
--- a/src/applications/phurl/controller/PhabricatorPhurlURLViewController.php
+++ b/src/applications/phurl/controller/PhabricatorPhurlURLViewController.php
@@ -139,7 +139,7 @@
       $url->getAlias());
 
     $description = $url->getDescription();
-    if (strlen($description)) {
+    if (@strlen($description)) {
       $description = new PHUIRemarkupView($viewer, $description);
       $properties->addSectionHeader(pht('Description'));
       $properties->addTextContent($description);
diff --git a/src/applications/phurl/editor/PhabricatorPhurlURLEditor.php b/src/applications/phurl/editor/PhabricatorPhurlURLEditor.php
--- a/src/applications/phurl/editor/PhabricatorPhurlURLEditor.php
+++ b/src/applications/phurl/editor/PhabricatorPhurlURLEditor.php
@@ -78,7 +78,7 @@
     $description = $object->getDescription();
     $body = parent::buildMailBody($object, $xactions);
 
-    if (strlen($description)) {
+    if (@strlen($description)) {
       $body->addRemarkupSection(
         pht('URL DESCRIPTION'),
         $object->getDescription());
diff --git a/src/applications/phurl/mail/PhabricatorPhurlURLMailReceiver.php b/src/applications/phurl/mail/PhabricatorPhurlURLMailReceiver.php
--- a/src/applications/phurl/mail/PhabricatorPhurlURLMailReceiver.php
+++ b/src/applications/phurl/mail/PhabricatorPhurlURLMailReceiver.php
@@ -13,7 +13,7 @@
   }
 
   protected function loadObject($pattern, PhabricatorUser $viewer) {
-    $id = (int)substr($pattern, 1);
+    $id = (int)@substr($pattern, 1);
 
     return id(new PhabricatorPhurlURLQuery())
       ->setViewer($viewer)
diff --git a/src/applications/phurl/phid/PhabricatorPhurlURLPHIDType.php b/src/applications/phurl/phid/PhabricatorPhurlURLPHIDType.php
--- a/src/applications/phurl/phid/PhabricatorPhurlURLPHIDType.php
+++ b/src/applications/phurl/phid/PhabricatorPhurlURLPHIDType.php
@@ -44,7 +44,7 @@
   }
 
   public function canLoadNamedObject($name) {
-    return preg_match('/^U[1-9]\d*$/i', $name);
+    return @preg_match('/^U[1-9]\d*$/i', $name);
   }
 
   public function loadNamedObjects(
@@ -53,7 +53,7 @@
 
     $id_map = array();
     foreach ($names as $name) {
-      $id = (int)substr($name, 1);
+      $id = (int)@substr($name, 1);
       $id_map[$id][] = $name;
     }
 
diff --git a/src/applications/phurl/remarkup/PhabricatorPhurlLinkRemarkupRule.php b/src/applications/phurl/remarkup/PhabricatorPhurlLinkRemarkupRule.php
--- a/src/applications/phurl/remarkup/PhabricatorPhurlLinkRemarkupRule.php
+++ b/src/applications/phurl/remarkup/PhabricatorPhurlLinkRemarkupRule.php
@@ -33,7 +33,7 @@
     $query = id(new PhabricatorPhurlURLQuery())
       ->setViewer($viewer);
 
-    if (preg_match($is_monogram, $ref, $monogram)) {
+    if (@preg_match($is_monogram, $ref, $monogram)) {
       $query->withIDs(array($monogram[1]));
     } else if (ctype_digit($ref)) {
       $query->withIDs(array($ref));
diff --git a/src/applications/phurl/storage/PhabricatorPhurlURL.php b/src/applications/phurl/storage/PhabricatorPhurlURL.php
--- a/src/applications/phurl/storage/PhabricatorPhurlURL.php
+++ b/src/applications/phurl/storage/PhabricatorPhurlURL.php
@@ -100,7 +100,7 @@
   }
 
   public function getRedirectURI() {
-    if (strlen($this->getAlias())) {
+    if (@strlen($this->getAlias())) {
       $path = '/u/'.$this->getAlias();
     } else {
       $path = '/u/'.$this->getID();
diff --git a/src/applications/phurl/xaction/PhabricatorPhurlURLAliasTransaction.php b/src/applications/phurl/xaction/PhabricatorPhurlURLAliasTransaction.php
--- a/src/applications/phurl/xaction/PhabricatorPhurlURLAliasTransaction.php
+++ b/src/applications/phurl/xaction/PhabricatorPhurlURLAliasTransaction.php
@@ -43,7 +43,7 @@
       $new_alias = $xaction->getNewValue();
 
       // Check length
-      $new_length = strlen($new_alias);
+      $new_length = @strlen($new_alias);
       if ($new_length > $max_length) {
         $errors[] = $this->newRequiredError(
           pht('The alias can be no longer than %d characters.', $max_length));
@@ -52,13 +52,13 @@
       // Check characters
       if ($xaction->getOldValue() != $xaction->getNewValue()) {
         $debug_alias = new PHUIInvisibleCharacterView($new_alias);
-        if (!preg_match('/[a-zA-Z]/', $new_alias)) {
+        if (!@preg_match('/[a-zA-Z]/', $new_alias)) {
           $errors[] = $this->newRequiredError(
             pht('The alias you provided (%s) must contain at least one '.
               'letter.',
               $debug_alias));
         }
-        if (preg_match('/[^a-z0-9]/i', $new_alias)) {
+        if (@preg_match('/[^a-z0-9]/i', $new_alias)) {
           $errors[] = $this->newRequiredError(
             pht('The alias you provided (%s) may only contain letters and '.
               'numbers.',
diff --git a/src/applications/policy/management/PhabricatorPolicyManagementUnlockWorkflow.php b/src/applications/policy/management/PhabricatorPolicyManagementUnlockWorkflow.php
--- a/src/applications/policy/management/PhabricatorPolicyManagementUnlockWorkflow.php
+++ b/src/applications/policy/management/PhabricatorPolicyManagementUnlockWorkflow.php
@@ -125,7 +125,7 @@
       pht('Modified object policies.'));
 
     $uri = $handle->getURI();
-    if (strlen($uri)) {
+    if (@strlen($uri)) {
       echo tsprintf(
         "\n        **%s**: __%s__\n\n",
         pht('Object URI'),
diff --git a/src/applications/policy/query/PhabricatorPolicyQuery.php b/src/applications/policy/query/PhabricatorPolicyQuery.php
--- a/src/applications/policy/query/PhabricatorPolicyQuery.php
+++ b/src/applications/policy/query/PhabricatorPolicyQuery.php
@@ -307,7 +307,7 @@
 
   public static function isObjectPolicy($identifier) {
     $prefix = self::OBJECT_POLICY_PREFIX;
-    return !strncmp($identifier, $prefix, strlen($prefix));
+    return !strncmp($identifier, $prefix, @strlen($prefix));
   }
 
   public static function getObjectPolicy($identifier) {
diff --git a/src/applications/ponder/controller/PonderAnswerEditController.php b/src/applications/ponder/controller/PonderAnswerEditController.php
--- a/src/applications/ponder/controller/PonderAnswerEditController.php
+++ b/src/applications/ponder/controller/PonderAnswerEditController.php
@@ -34,7 +34,7 @@
       $v_content = $request->getStr('content');
       $v_status = $request->getStr('status');
 
-      if (!strlen($v_content)) {
+      if (!@strlen($v_content)) {
         $errors[] = pht('You must provide some substance in your answer.');
         $e_content = pht('Required');
       }
diff --git a/src/applications/ponder/controller/PonderAnswerSaveController.php b/src/applications/ponder/controller/PonderAnswerSaveController.php
--- a/src/applications/ponder/controller/PonderAnswerSaveController.php
+++ b/src/applications/ponder/controller/PonderAnswerSaveController.php
@@ -21,7 +21,7 @@
 
     $content = $request->getStr('answer');
 
-    if (!strlen(trim($content))) {
+    if (!@strlen(trim($content))) {
       $dialog = id(new AphrontDialogView())
         ->setUser($viewer)
         ->setTitle(pht('Empty Answer'))
diff --git a/src/applications/ponder/mail/PonderAnswerMailReceiver.php b/src/applications/ponder/mail/PonderAnswerMailReceiver.php
--- a/src/applications/ponder/mail/PonderAnswerMailReceiver.php
+++ b/src/applications/ponder/mail/PonderAnswerMailReceiver.php
@@ -12,7 +12,7 @@
   }
 
   protected function loadObject($pattern, PhabricatorUser $viewer) {
-    $id = (int)substr($pattern, 4);
+    $id = (int)@substr($pattern, 4);
 
     return id(new PonderAnswerQuery())
       ->setViewer($viewer)
diff --git a/src/applications/ponder/mail/PonderQuestionCreateMailReceiver.php b/src/applications/ponder/mail/PonderQuestionCreateMailReceiver.php
--- a/src/applications/ponder/mail/PonderQuestionCreateMailReceiver.php
+++ b/src/applications/ponder/mail/PonderQuestionCreateMailReceiver.php
@@ -13,7 +13,7 @@
     $author = $this->getAuthor();
 
     $title = $mail->getSubject();
-    if (!strlen($title)) {
+    if (!@strlen($title)) {
       $title = pht('New Question');
     }
 
diff --git a/src/applications/ponder/mail/PonderQuestionMailReceiver.php b/src/applications/ponder/mail/PonderQuestionMailReceiver.php
--- a/src/applications/ponder/mail/PonderQuestionMailReceiver.php
+++ b/src/applications/ponder/mail/PonderQuestionMailReceiver.php
@@ -12,7 +12,7 @@
   }
 
   protected function loadObject($pattern, PhabricatorUser $viewer) {
-    $id = (int)substr($pattern, 1);
+    $id = (int)@substr($pattern, 1);
 
     return id(new PonderQuestionQuery())
       ->setViewer($viewer)
diff --git a/src/applications/ponder/phid/PonderQuestionPHIDType.php b/src/applications/ponder/phid/PonderQuestionPHIDType.php
--- a/src/applications/ponder/phid/PonderQuestionPHIDType.php
+++ b/src/applications/ponder/phid/PonderQuestionPHIDType.php
@@ -41,7 +41,7 @@
   }
 
   public function canLoadNamedObject($name) {
-    return preg_match('/^Q\d*[1-9]\d*$/i', $name);
+    return @preg_match('/^Q\d*[1-9]\d*$/i', $name);
   }
 
   public function loadNamedObjects(
@@ -50,7 +50,7 @@
 
     $id_map = array();
     foreach ($names as $name) {
-      $id = (int)substr($name, 1);
+      $id = (int)@substr($name, 1);
       $id_map[$id][] = $name;
     }
 
diff --git a/src/applications/ponder/xaction/PonderAnswerContentTransaction.php b/src/applications/ponder/xaction/PonderAnswerContentTransaction.php
--- a/src/applications/ponder/xaction/PonderAnswerContentTransaction.php
+++ b/src/applications/ponder/xaction/PonderAnswerContentTransaction.php
@@ -16,7 +16,7 @@
   public function getTitle() {
     $old = $this->getOldValue();
 
-    if (!strlen($old)) {
+    if (!@strlen($old)) {
       return pht(
         '%s added an answer.',
         $this->renderAuthor());
@@ -30,7 +30,7 @@
   public function getTitleForFeed() {
     $old = $this->getOldValue();
 
-    if (!strlen($old)) {
+    if (!@strlen($old)) {
       return pht(
         '%s added %s.',
         $this->renderAuthor(),
diff --git a/src/applications/ponder/xaction/PonderQuestionTitleTransaction.php b/src/applications/ponder/xaction/PonderQuestionTitleTransaction.php
--- a/src/applications/ponder/xaction/PonderQuestionTitleTransaction.php
+++ b/src/applications/ponder/xaction/PonderQuestionTitleTransaction.php
@@ -41,7 +41,7 @@
     $max_length = $object->getColumnMaximumByteLength('title');
     foreach ($xactions as $xaction) {
       $new_value = $xaction->getNewValue();
-      $new_length = strlen($new_value);
+      $new_length = @strlen($new_value);
       if ($new_length > $max_length) {
         $errors[] = $this->newInvalidError(
           pht('The title can be no longer than %s characters.',
diff --git a/src/applications/project/__tests__/PhabricatorProjectCoreTestCase.php b/src/applications/project/__tests__/PhabricatorProjectCoreTestCase.php
--- a/src/applications/project/__tests__/PhabricatorProjectCoreTestCase.php
+++ b/src/applications/project/__tests__/PhabricatorProjectCoreTestCase.php
@@ -1435,7 +1435,7 @@
 
     $task = ManiphestTask::initializeNewTask($viewer);
 
-    if (!strlen($name)) {
+    if (!@strlen($name)) {
       $name = pht('Test Task');
     }
 
diff --git a/src/applications/project/constants/PhabricatorProjectWorkboardBackgroundColor.php b/src/applications/project/constants/PhabricatorProjectWorkboardBackgroundColor.php
--- a/src/applications/project/constants/PhabricatorProjectWorkboardBackgroundColor.php
+++ b/src/applications/project/constants/PhabricatorProjectWorkboardBackgroundColor.php
@@ -110,7 +110,7 @@
 
     foreach ($options as $key => $option) {
       if (empty($option['group'])) {
-        if (preg_match('/^gradient/', $option['key'])) {
+        if (@preg_match('/^gradient/', $option['key'])) {
           $option['group'] = 'gradient';
         } else {
           $option['group'] = 'solid';
diff --git a/src/applications/project/controller/PhabricatorProjectBoardReloadController.php b/src/applications/project/controller/PhabricatorProjectBoardReloadController.php
--- a/src/applications/project/controller/PhabricatorProjectBoardReloadController.php
+++ b/src/applications/project/controller/PhabricatorProjectBoardReloadController.php
@@ -12,7 +12,7 @@
     }
 
     $order = $request->getStr('order');
-    if (!strlen($order)) {
+    if (!@strlen($order)) {
       $order = PhabricatorProjectColumnNaturalOrder::ORDERKEY;
     }
 
diff --git a/src/applications/project/controller/PhabricatorProjectMoveController.php b/src/applications/project/controller/PhabricatorProjectMoveController.php
--- a/src/applications/project/controller/PhabricatorProjectMoveController.php
+++ b/src/applications/project/controller/PhabricatorProjectMoveController.php
@@ -16,7 +16,7 @@
     $before_phids = $request->getStrList('beforePHIDs');
 
     $order = $request->getStr('order');
-    if (!strlen($order)) {
+    if (!@strlen($order)) {
       $order = PhabricatorProjectColumnNaturalOrder::ORDERKEY;
     }
 
@@ -26,7 +26,7 @@
 
     $edit_header = null;
     $raw_header = $request->getStr('header');
-    if (strlen($raw_header)) {
+    if (@strlen($raw_header)) {
       $edit_header = phutil_json_decode($raw_header);
     } else {
       $edit_header = array();
diff --git a/src/applications/project/engineextension/ProjectDatasourceEngineExtension.php b/src/applications/project/engineextension/ProjectDatasourceEngineExtension.php
--- a/src/applications/project/engineextension/ProjectDatasourceEngineExtension.php
+++ b/src/applications/project/engineextension/ProjectDatasourceEngineExtension.php
@@ -13,13 +13,13 @@
     $viewer = $this->getViewer();
 
     // Send "p" to Projects.
-    if (preg_match('/^p\z/i', $query)) {
+    if (@preg_match('/^p\z/i', $query)) {
       return '/diffusion/';
     }
 
     // Send "p <string>" to a search for similar projects.
     $matches = null;
-    if (preg_match('/^p\s+(.+)\z/i', $query, $matches)) {
+    if (@preg_match('/^p\s+(.+)\z/i', $query, $matches)) {
       $raw_query = $matches[1];
 
       $engine = id(new PhabricatorProject())
diff --git a/src/applications/project/icon/PhabricatorProjectIconSet.php b/src/applications/project/icon/PhabricatorProjectIconSet.php
--- a/src/applications/project/icon/PhabricatorProjectIconSet.php
+++ b/src/applications/project/icon/PhabricatorProjectIconSet.php
@@ -218,7 +218,7 @@
           'default' => 'optional bool',
         ));
 
-      if (!preg_match('/^[a-z]{1,32}\z/', $value['key'])) {
+      if (!@preg_match('/^[a-z]{1,32}\z/', $value['key'])) {
         throw new Exception(
           pht(
             'Icon key "%s" is not a valid icon key. Icon keys must be 1-32 '.
diff --git a/src/applications/project/menuitem/PhabricatorProjectDetailsProfileMenuItem.php b/src/applications/project/menuitem/PhabricatorProjectDetailsProfileMenuItem.php
--- a/src/applications/project/menuitem/PhabricatorProjectDetailsProfileMenuItem.php
+++ b/src/applications/project/menuitem/PhabricatorProjectDetailsProfileMenuItem.php
@@ -31,7 +31,7 @@
     PhabricatorProfileMenuItemConfiguration $config) {
     $name = $config->getMenuItemProperty('name');
 
-    if (strlen($name)) {
+    if (@strlen($name)) {
       return $name;
     }
 
diff --git a/src/applications/project/menuitem/PhabricatorProjectManageProfileMenuItem.php b/src/applications/project/menuitem/PhabricatorProjectManageProfileMenuItem.php
--- a/src/applications/project/menuitem/PhabricatorProjectManageProfileMenuItem.php
+++ b/src/applications/project/menuitem/PhabricatorProjectManageProfileMenuItem.php
@@ -31,7 +31,7 @@
     PhabricatorProfileMenuItemConfiguration $config) {
     $name = $config->getMenuItemProperty('name');
 
-    if (strlen($name)) {
+    if (@strlen($name)) {
       return $name;
     }
 
diff --git a/src/applications/project/menuitem/PhabricatorProjectMembersProfileMenuItem.php b/src/applications/project/menuitem/PhabricatorProjectMembersProfileMenuItem.php
--- a/src/applications/project/menuitem/PhabricatorProjectMembersProfileMenuItem.php
+++ b/src/applications/project/menuitem/PhabricatorProjectMembersProfileMenuItem.php
@@ -21,7 +21,7 @@
     PhabricatorProfileMenuItemConfiguration $config) {
     $name = $config->getMenuItemProperty('name');
 
-    if (strlen($name)) {
+    if (@strlen($name)) {
       return $name;
     }
 
diff --git a/src/applications/project/menuitem/PhabricatorProjectReportsProfileMenuItem.php b/src/applications/project/menuitem/PhabricatorProjectReportsProfileMenuItem.php
--- a/src/applications/project/menuitem/PhabricatorProjectReportsProfileMenuItem.php
+++ b/src/applications/project/menuitem/PhabricatorProjectReportsProfileMenuItem.php
@@ -46,7 +46,7 @@
     PhabricatorProfileMenuItemConfiguration $config) {
     $name = $config->getMenuItemProperty('name');
 
-    if (strlen($name)) {
+    if (@strlen($name)) {
       return $name;
     }
 
diff --git a/src/applications/project/menuitem/PhabricatorProjectSubprojectsProfileMenuItem.php b/src/applications/project/menuitem/PhabricatorProjectSubprojectsProfileMenuItem.php
--- a/src/applications/project/menuitem/PhabricatorProjectSubprojectsProfileMenuItem.php
+++ b/src/applications/project/menuitem/PhabricatorProjectSubprojectsProfileMenuItem.php
@@ -29,7 +29,7 @@
     PhabricatorProfileMenuItemConfiguration $config) {
     $name = $config->getMenuItemProperty('name');
 
-    if (strlen($name)) {
+    if (@strlen($name)) {
       return $name;
     }
 
diff --git a/src/applications/project/menuitem/PhabricatorProjectWorkboardProfileMenuItem.php b/src/applications/project/menuitem/PhabricatorProjectWorkboardProfileMenuItem.php
--- a/src/applications/project/menuitem/PhabricatorProjectWorkboardProfileMenuItem.php
+++ b/src/applications/project/menuitem/PhabricatorProjectWorkboardProfileMenuItem.php
@@ -38,7 +38,7 @@
     PhabricatorProfileMenuItemConfiguration $config) {
     $name = $config->getMenuItemProperty('name');
 
-    if (strlen($name)) {
+    if (@strlen($name)) {
       return $name;
     }
 
diff --git a/src/applications/project/phid/PhabricatorProjectProjectPHIDType.php b/src/applications/project/phid/PhabricatorProjectProjectPHIDType.php
--- a/src/applications/project/phid/PhabricatorProjectProjectPHIDType.php
+++ b/src/applications/project/phid/PhabricatorProjectProjectPHIDType.php
@@ -43,7 +43,7 @@
 
       $handle->setName($name);
 
-      if (strlen($slug)) {
+      if (@strlen($slug)) {
         $handle->setObjectName('#'.$slug);
         $handle->setMailStampName('#'.$slug);
         $handle->setURI("/tag/{$slug}/");
@@ -72,7 +72,7 @@
 
   public function canLoadNamedObject($name) {
     $fragment = self::getProjectMonogramPatternFragment();
-    return preg_match('/^#'.$fragment.'$/i', $name);
+    return @preg_match('/^#'.$fragment.'$/i', $name);
   }
 
   public function loadNamedObjects(
@@ -84,7 +84,7 @@
 
     $map = array();
     foreach ($names as $key => $slug) {
-      $map[$this->normalizeSlug(substr($slug, 1))][] = $slug;
+      $map[$this->normalizeSlug(@substr($slug, 1))][] = $slug;
     }
 
     $projects = id(new PhabricatorProjectQuery())
diff --git a/src/applications/project/query/PhabricatorProjectQuery.php b/src/applications/project/query/PhabricatorProjectQuery.php
--- a/src/applications/project/query/PhabricatorProjectQuery.php
+++ b/src/applications/project/query/PhabricatorProjectQuery.php
@@ -889,7 +889,7 @@
 
     $length_map = array();
     foreach ($tokens as $token) {
-      $length_map[$token] = strlen($token);
+      $length_map[$token] = @strlen($token);
     }
     arsort($length_map);
 
diff --git a/src/applications/project/query/PhabricatorProjectSearchEngine.php b/src/applications/project/query/PhabricatorProjectSearchEngine.php
--- a/src/applications/project/query/PhabricatorProjectSearchEngine.php
+++ b/src/applications/project/query/PhabricatorProjectSearchEngine.php
@@ -130,7 +130,7 @@
   protected function buildQueryFromParameters(array $map) {
     $query = $this->newQuery();
 
-    if (strlen($map['name'])) {
+    if (@strlen($map['name'])) {
       $tokens = PhabricatorTypeaheadDatasource::tokenizeString($map['name']);
       $query->withNameTokens($tokens);
     }
diff --git a/src/applications/project/remarkup/ProjectRemarkupRule.php b/src/applications/project/remarkup/ProjectRemarkupRule.php
--- a/src/applications/project/remarkup/ProjectRemarkupRule.php
+++ b/src/applications/project/remarkup/ProjectRemarkupRule.php
@@ -67,7 +67,7 @@
     // Slice the "#" off again.
     $result = array();
     foreach ($projects as $name => $project) {
-      $result[substr($name, 1)] = $project;
+      $result[@substr($name, 1)] = $project;
     }
 
     return $result;
diff --git a/src/applications/project/state/PhabricatorWorkboardViewState.php b/src/applications/project/state/PhabricatorWorkboardViewState.php
--- a/src/applications/project/state/PhabricatorWorkboardViewState.php
+++ b/src/applications/project/state/PhabricatorWorkboardViewState.php
@@ -41,7 +41,7 @@
       $this->requestState['filter'] = $request->getStr('filter');
     }
 
-    if (strlen($request->getURIData('queryKey'))) {
+    if (@strlen($request->getURIData('queryKey'))) {
       $this->requestState['filter'] = $request->getURIData('queryKey');
     }
 
@@ -169,7 +169,7 @@
 
   public function getQueryKey() {
     $request_query = idx($this->requestState, 'filter');
-    if (strlen($request_query)) {
+    if (@strlen($request_query)) {
       return $request_query;
     }
 
@@ -203,7 +203,7 @@
 
     $default_query = $project->getDefaultWorkboardFilter();
 
-    if (strlen($default_query)) {
+    if (@strlen($default_query)) {
       return $default_query;
     }
 
diff --git a/src/applications/project/storage/PhabricatorProject.php b/src/applications/project/storage/PhabricatorProject.php
--- a/src/applications/project/storage/PhabricatorProject.php
+++ b/src/applications/project/storage/PhabricatorProject.php
@@ -407,13 +407,13 @@
       $this->setMailKey(Filesystem::readRandomCharacters(20));
     }
 
-    if (!strlen($this->getPHID())) {
+    if (!@strlen($this->getPHID())) {
       $this->setPHID($this->generatePHID());
     }
 
-    if (!strlen($this->getProjectPathKey())) {
+    if (!@strlen($this->getProjectPathKey())) {
       $hash = PhabricatorHash::digestForIndex($this->getPHID());
-      $hash = substr($hash, 0, 4);
+      $hash = @substr($hash, 0, 4);
       $this->setProjectPathKey($hash);
     }
 
@@ -505,10 +505,10 @@
     $parts = array();
 
     $path = $this->getProjectPath();
-    $parent_length = (strlen($path) - 4);
+    $parent_length = (@strlen($path) - 4);
 
     for ($ii = $parent_length; $ii > 0; $ii -= 4) {
-      $parts[] = substr($path, 0, $ii);
+      $parts[] = @substr($path, 0, $ii);
     }
 
     return $parts;
diff --git a/src/applications/project/storage/PhabricatorProjectColumn.php b/src/applications/project/storage/PhabricatorProjectColumn.php
--- a/src/applications/project/storage/PhabricatorProjectColumn.php
+++ b/src/applications/project/storage/PhabricatorProjectColumn.php
@@ -105,7 +105,7 @@
     }
 
     $name = $this->getName();
-    if (strlen($name)) {
+    if (@strlen($name)) {
       return $name;
     }
 
diff --git a/src/applications/project/storage/PhabricatorProjectTrigger.php b/src/applications/project/storage/PhabricatorProjectTrigger.php
--- a/src/applications/project/storage/PhabricatorProjectTrigger.php
+++ b/src/applications/project/storage/PhabricatorProjectTrigger.php
@@ -53,7 +53,7 @@
 
   public function getDisplayName() {
     $name = $this->getName();
-    if (strlen($name)) {
+    if (@strlen($name)) {
       return $name;
     }
 
diff --git a/src/applications/project/typeahead/PhabricatorProjectDatasource.php b/src/applications/project/typeahead/PhabricatorProjectDatasource.php
--- a/src/applications/project/typeahead/PhabricatorProjectDatasource.php
+++ b/src/applications/project/typeahead/PhabricatorProjectDatasource.php
@@ -83,10 +83,10 @@
       }
 
       $slug = $proj->getPrimarySlug();
-      if (!strlen($slug)) {
+      if (!@strlen($slug)) {
         foreach ($proj->getSlugs() as $slug_object) {
           $slug = $slug_object->getSlug();
-          if (strlen($slug)) {
+          if (@strlen($slug)) {
             break;
           }
         }
@@ -94,7 +94,7 @@
 
       // If we're building results for the autocompleter and this project
       // doesn't have any usable slugs, don't return it as a result.
-      if ($for_autocomplete && !strlen($slug)) {
+      if ($for_autocomplete && !@strlen($slug)) {
         continue;
       }
 
@@ -132,7 +132,7 @@
         ->setPriorityType('proj')
         ->setClosed($closed);
 
-      if (strlen($slug)) {
+      if (@strlen($slug)) {
         $proj_result->setAutocomplete('#'.$slug);
       }
 
@@ -142,7 +142,7 @@
         $proj_result->addAttribute($proj->getDisplayIconName());
 
         $description = idx($descriptions, $phid);
-        if (strlen($description)) {
+        if (@strlen($description)) {
           $summary = PhabricatorMarkupEngine::summarizeSentence($description);
           $proj_result->addAttribute($summary);
         }
diff --git a/src/applications/project/xaction/PhabricatorProjectNameTransaction.php b/src/applications/project/xaction/PhabricatorProjectNameTransaction.php
--- a/src/applications/project/xaction/PhabricatorProjectNameTransaction.php
+++ b/src/applications/project/xaction/PhabricatorProjectNameTransaction.php
@@ -72,7 +72,7 @@
     $max_length = $object->getColumnMaximumByteLength('name');
     foreach ($xactions as $xaction) {
       $new_value = $xaction->getNewValue();
-      $new_length = strlen($new_value);
+      $new_length = @strlen($new_value);
       if ($new_length > $max_length) {
         $errors[] = $this->newInvalidError(
           pht(
diff --git a/src/applications/project/xaction/column/PhabricatorProjectColumnLimitTransaction.php b/src/applications/project/xaction/column/PhabricatorProjectColumnLimitTransaction.php
--- a/src/applications/project/xaction/column/PhabricatorProjectColumnLimitTransaction.php
+++ b/src/applications/project/xaction/column/PhabricatorProjectColumnLimitTransaction.php
@@ -10,7 +10,7 @@
   }
 
   public function generateNewValue($object, $value) {
-    if (strlen($value)) {
+    if (@strlen($value)) {
       return (int)$value;
     } else {
       return null;
@@ -48,7 +48,7 @@
 
     foreach ($xactions as $xaction) {
       $value = $xaction->getNewValue();
-      if (strlen($value) && !preg_match('/^\d+\z/', $value)) {
+      if (@strlen($value) && !@preg_match('/^\d+\z/', $value)) {
         $errors[] = $this->newInvalidError(
           pht(
             'Column point limit must either be empty or a nonnegative '.
diff --git a/src/applications/project/xaction/column/PhabricatorProjectColumnNameTransaction.php b/src/applications/project/xaction/column/PhabricatorProjectColumnNameTransaction.php
--- a/src/applications/project/xaction/column/PhabricatorProjectColumnNameTransaction.php
+++ b/src/applications/project/xaction/column/PhabricatorProjectColumnNameTransaction.php
@@ -17,12 +17,12 @@
     $old = $this->getOldValue();
     $new = $this->getNewValue();
 
-    if (!strlen($old)) {
+    if (!@strlen($old)) {
       return pht(
         '%s named this column %s.',
         $this->renderAuthor(),
         $this->renderNewValue());
-    } else if (strlen($new)) {
+    } else if (@strlen($new)) {
       return pht(
         '%s renamed this column from %s to %s.',
         $this->renderAuthor(),
@@ -53,7 +53,7 @@
     $max_length = $object->getColumnMaximumByteLength('name');
     foreach ($xactions as $xaction) {
       $new_value = $xaction->getNewValue();
-      $new_length = strlen($new_value);
+      $new_length = @strlen($new_value);
       if ($new_length > $max_length) {
         $errors[] = $this->newInvalidError(
           pht(
diff --git a/src/applications/project/xaction/trigger/PhabricatorProjectTriggerNameTransaction.php b/src/applications/project/xaction/trigger/PhabricatorProjectTriggerNameTransaction.php
--- a/src/applications/project/xaction/trigger/PhabricatorProjectTriggerNameTransaction.php
+++ b/src/applications/project/xaction/trigger/PhabricatorProjectTriggerNameTransaction.php
@@ -17,13 +17,13 @@
     $old = $this->getOldValue();
     $new = $this->getNewValue();
 
-    if (strlen($old) && strlen($new)) {
+    if (@strlen($old) && @strlen($new)) {
       return pht(
         '%s renamed this trigger from %s to %s.',
         $this->renderAuthor(),
         $this->renderOldValue(),
         $this->renderNewValue());
-    } else if (strlen($new)) {
+    } else if (@strlen($new)) {
       return pht(
         '%s named this trigger %s.',
         $this->renderAuthor(),
@@ -42,7 +42,7 @@
     $max_length = $object->getColumnMaximumByteLength('name');
     foreach ($xactions as $xaction) {
       $new_value = $xaction->getNewValue();
-      $new_length = strlen($new_value);
+      $new_length = @strlen($new_value);
       if ($new_length > $max_length) {
         $errors[] = $this->newInvalidError(
           pht(
diff --git a/src/applications/releeph/commitfinder/ReleephCommitFinder.php b/src/applications/releeph/commitfinder/ReleephCommitFinder.php
--- a/src/applications/releeph/commitfinder/ReleephCommitFinder.php
+++ b/src/applications/releeph/commitfinder/ReleephCommitFinder.php
@@ -28,7 +28,7 @@
 
     // Look for diffs
     $matches = array();
-    if (preg_match('/^D([1-9]\d*)$/', $partial_string, $matches)) {
+    if (@preg_match('/^D([1-9]\d*)$/', $partial_string, $matches)) {
       $diff_id = $matches[1];
       $diff_rev = id(new DifferentialRevisionQuery())
         ->setViewer($this->getUser())
@@ -64,7 +64,7 @@
     $repository = $this->releephProject->getRepository();
     $dr_data = null;
     $matches = array();
-    if (preg_match('/^r(?P<callsign>[A-Z]+)(?P<commit>\w+)$/',
+    if (@preg_match('/^r(?P<callsign>[A-Z]+)(?P<commit>\w+)$/',
       $partial_string, $matches)) {
       $callsign = $matches['callsign'];
       if ($callsign != $repository->getCallsign()) {
diff --git a/src/applications/releeph/conduit/work/ReleephWorkGetBranchCommitMessageConduitAPIMethod.php b/src/applications/releeph/conduit/work/ReleephWorkGetBranchCommitMessageConduitAPIMethod.php
--- a/src/applications/releeph/conduit/work/ReleephWorkGetBranchCommitMessageConduitAPIMethod.php
+++ b/src/applications/releeph/conduit/work/ReleephWorkGetBranchCommitMessageConduitAPIMethod.php
@@ -64,7 +64,7 @@
 
     $cut_point_pr_commit = id(new PhabricatorRepositoryCommit())
       ->loadOneWhere('phid = %s', $cut_phid);
-    $cut_point_commit_date = strftime(
+    $cut_point_commit_date = @strftime(
       '%Y-%m-%d %H:%M:%S%z',
       $cut_point_pr_commit->getEpoch());
     $commit_message[] = pht('Cut Point Date: %s', $cut_point_commit_date);
diff --git a/src/applications/releeph/conduit/work/ReleephWorkGetCommitMessageConduitAPIMethod.php b/src/applications/releeph/conduit/work/ReleephWorkGetCommitMessageConduitAPIMethod.php
--- a/src/applications/releeph/conduit/work/ReleephWorkGetCommitMessageConduitAPIMethod.php
+++ b/src/applications/releeph/conduit/work/ReleephWorkGetCommitMessageConduitAPIMethod.php
@@ -78,8 +78,8 @@
       }
 
       if ($label && $value) {
-        if (strpos($value, "\n") !== false ||
-            substr($value, 0, 2) === '  ') {
+        if (@strpos($value, "\n") !== false ||
+            @substr($value, 0, 2) === '  ') {
           $commit_message[] = "{$label}:\n{$value}";
         } else {
           $commit_message[] = "{$label}: {$value}";
diff --git a/src/applications/releeph/constants/ReleephRequestStatus.php b/src/applications/releeph/constants/ReleephRequestStatus.php
--- a/src/applications/releeph/constants/ReleephRequestStatus.php
+++ b/src/applications/releeph/constants/ReleephRequestStatus.php
@@ -25,7 +25,7 @@
 
   public static function getStatusClassSuffixFor($status) {
     $description = self::getStatusDescriptionFor($status);
-    $class = str_replace(' ', '-', strtolower($description));
+    $class = str_replace(' ', '-', @strtolower($description));
     return $class;
   }
 
diff --git a/src/applications/releeph/controller/product/ReleephProductEditController.php b/src/applications/releeph/controller/product/ReleephProductEditController.php
--- a/src/applications/releeph/controller/product/ReleephProductEditController.php
+++ b/src/applications/releeph/controller/product/ReleephProductEditController.php
@@ -36,7 +36,7 @@
       $product->getDetail('pick_failure_instructions'));
     $test_paths = $request->getStr('testPaths');
     if ($test_paths !== null) {
-      $test_paths = array_filter(explode("\n", $test_paths));
+      $test_paths = array_filter(@explode("\n", $test_paths));
     } else {
       $test_paths = $product->getDetail('testPaths', array());
     }
@@ -69,7 +69,7 @@
       }
 
       foreach ($test_paths as $test_path) {
-        $result = @preg_match($test_path, '');
+        $result = @@preg_match($test_path, '');
         $is_a_valid_regexp = $result !== false;
         if (!$is_a_valid_regexp) {
           $errors[] = pht('Please provide a valid regular expression: '.
diff --git a/src/applications/releeph/controller/request/ReleephRequestTypeaheadController.php b/src/applications/releeph/controller/request/ReleephRequestTypeaheadController.php
--- a/src/applications/releeph/controller/request/ReleephRequestTypeaheadController.php
+++ b/src/applications/releeph/controller/request/ReleephRequestTypeaheadController.php
@@ -48,7 +48,7 @@
 
     foreach ($rows as $row) {
       $full_commit_id = $row['commitIdentifier'];
-      $short_commit_id = substr($full_commit_id, 0, 12);
+      $short_commit_id = @substr($full_commit_id, 0, 12);
       $first_line = $this->getFirstLine($row['shortMessage']);
       $data[] = array(
         $full_commit_id,
@@ -79,8 +79,8 @@
     $string = ltrim($commit_message_fragment);
     $first_line = $string;
     foreach ($separators as $separator) {
-      if ($pos = strpos($string, $separator)) {
-        $first_line = substr($string, 0, $pos);
+      if ($pos = @strpos($string, $separator)) {
+        $first_line = @substr($string, 0, $pos);
         break;
       }
     }
diff --git a/src/applications/releeph/differential/DifferentialReleephRequestFieldSpecification.php b/src/applications/releeph/differential/DifferentialReleephRequestFieldSpecification.php
--- a/src/applications/releeph/differential/DifferentialReleephRequestFieldSpecification.php
+++ b/src/applications/releeph/differential/DifferentialReleephRequestFieldSpecification.php
@@ -152,11 +152,11 @@
      * To hack around this, just consider the first line of $value when
      * determining what Releeph actions the parsed commit is performing.
      */
-    $first_line = head(array_filter(explode("\n", $value)));
+    $first_line = head(array_filter(@explode("\n", $value)));
 
     $tokens = preg_split('/\s*,?\s+/', $first_line);
     $raw_action = array_shift($tokens);
-    $action = strtolower($raw_action);
+    $action = @strtolower($raw_action);
 
     if (!$action) {
       return null;
@@ -178,7 +178,7 @@
     $releeph_requests = array();
     foreach ($tokens as $token) {
       $match = array();
-      if (!preg_match('/^(?:RQ)?(\d+)$/i', $token, $match)) {
+      if (!@preg_match('/^(?:RQ)?(\d+)$/i', $token, $match)) {
         $label = $this->renderLabelForCommitMessage();
         throw new DifferentialFieldParseException(
           pht(
@@ -330,11 +330,11 @@
 
         $remote_prefix = 'remotes/origin/';
         $branches = array();
-        foreach (array_filter(explode("\n", $output)) as $line) {
-          $tokens = explode(' ', $line);
+        foreach (array_filter(@explode("\n", $output)) as $line) {
+          $tokens = @explode(' ', $line);
           $ref = last($tokens);
-          if (strncmp($ref, $remote_prefix, strlen($remote_prefix)) === 0) {
-            $branch = substr($ref, strlen($remote_prefix));
+          if (strncmp($ref, $remote_prefix, @strlen($remote_prefix)) === 0) {
+            $branch = @substr($ref, @strlen($remote_prefix));
             $branches[$branch] = $branch;
           }
         }
@@ -357,7 +357,7 @@
         $in_branch = array();
         $ex_branch = array();
         foreach ($commit_paths as $path) {
-          if (strncmp($path, $branch_path, strlen($branch_path)) === 0) {
+          if (strncmp($path, $branch_path, @strlen($branch_path)) === 0) {
             $in_branch[] = $path;
           } else {
             $ex_branch[] = $path;
diff --git a/src/applications/releeph/editor/ReleephBranchEditor.php b/src/applications/releeph/editor/ReleephBranchEditor.php
--- a/src/applications/releeph/editor/ReleephBranchEditor.php
+++ b/src/applications/releeph/editor/ReleephBranchEditor.php
@@ -36,7 +36,7 @@
       ->setReleephProjectName($this->releephProject->getName())
       ->interpolate($template);
 
-    $basename = last(explode('/', $name));
+    $basename = last(@explode('/', $name));
 
     $table = id(new ReleephBranch());
     $transaction = $table->openTransaction();
diff --git a/src/applications/releeph/field/specification/ReleephFieldSpecification.php b/src/applications/releeph/field/specification/ReleephFieldSpecification.php
--- a/src/applications/releeph/field/specification/ReleephFieldSpecification.php
+++ b/src/applications/releeph/field/specification/ReleephFieldSpecification.php
@@ -43,7 +43,7 @@
     if ($key === null) {
       throw new PhabricatorCustomFieldImplementationIncompleteException($this);
     }
-    if (strpos($key, '.') !== false) {
+    if (@strpos($key, '.') !== false) {
       /**
        * Storage keys are reused for form controls, and periods in form control
        * names break HTML forms.
diff --git a/src/applications/releeph/field/specification/ReleephSummaryFieldSpecification.php b/src/applications/releeph/field/specification/ReleephSummaryFieldSpecification.php
--- a/src/applications/releeph/field/specification/ReleephSummaryFieldSpecification.php
+++ b/src/applications/releeph/field/specification/ReleephSummaryFieldSpecification.php
@@ -40,7 +40,7 @@
   }
 
   public function validate($summary) {
-    if ($summary && strlen($summary) > self::MAX_SUMMARY_LENGTH) {
+    if ($summary && @strlen($summary) > self::MAX_SUMMARY_LENGTH) {
       $this->error = pht('Too long!');
       throw new ReleephFieldParseException(
         $this,
diff --git a/src/applications/releeph/mail/ReleephRequestMailReceiver.php b/src/applications/releeph/mail/ReleephRequestMailReceiver.php
--- a/src/applications/releeph/mail/ReleephRequestMailReceiver.php
+++ b/src/applications/releeph/mail/ReleephRequestMailReceiver.php
@@ -12,7 +12,7 @@
   }
 
   protected function loadObject($pattern, PhabricatorUser $viewer) {
-    $id = (int)substr($pattern, 1);
+    $id = (int)@substr($pattern, 1);
 
     return id(new ReleephRequestQuery())
       ->setViewer($viewer)
diff --git a/src/applications/releeph/storage/ReleephProject.php b/src/applications/releeph/storage/ReleephProject.php
--- a/src/applications/releeph/storage/ReleephProject.php
+++ b/src/applications/releeph/storage/ReleephProject.php
@@ -104,7 +104,7 @@
     $test_paths = $this->getDetail('testPaths', array());
 
     foreach ($test_paths as $test_path) {
-      if (preg_match($test_path, $filename)) {
+      if (@preg_match($test_path, $filename)) {
         return true;
       }
     }
diff --git a/src/applications/releeph/storage/ReleephRequest.php b/src/applications/releeph/storage/ReleephRequest.php
--- a/src/applications/releeph/storage/ReleephRequest.php
+++ b/src/applications/releeph/storage/ReleephRequest.php
@@ -240,14 +240,14 @@
   public function getSummaryForDisplay() {
     $summary = $this->getDetail('summary');
 
-    if (!strlen($summary)) {
+    if (!@strlen($summary)) {
       $commit = $this->loadPhabricatorRepositoryCommit();
       if ($commit) {
         $summary = $commit->getSummary();
       }
     }
 
-    if (!strlen($summary)) {
+    if (!@strlen($summary)) {
       $summary = pht('None');
     }
 
diff --git a/src/applications/releeph/view/branch/ReleephBranchTemplate.php b/src/applications/releeph/view/branch/ReleephBranchTemplate.php
--- a/src/applications/releeph/view/branch/ReleephBranchTemplate.php
+++ b/src/applications/releeph/view/branch/ReleephBranchTemplate.php
@@ -96,13 +96,13 @@
       preg_split('/r[A-Z]+/', $this->commitHandle->getName()));
 
     $interpolations = array();
-    for ($ii = 0; $ii < strlen($name); $ii++) {
-      $char = substr($name, $ii, 1);
+    for ($ii = 0; $ii < @strlen($name); $ii++) {
+      $char = @substr($name, $ii, 1);
       $prev = null;
       if ($ii > 0) {
-        $prev = substr($name, $ii - 1, 1);
+        $prev = @substr($name, $ii - 1, 1);
       }
-      $next = substr($name, $ii + 1, 1);
+      $next = @substr($name, $ii + 1, 1);
       if ($next && $char == '%' && $prev != '%') {
         $interpolations[$ii] = $next;
       }
@@ -138,13 +138,13 @@
           break;
 
         case 'p':
-          $replacement = strtolower($safe_project_name);
+          $replacement = @strtolower($safe_project_name);
           $is_variable = false;
           break;
 
         default:
           // Format anything else using strftime()
-          $replacement = strftime("%{$code}", $branch_date);
+          $replacement = @strftime("%{$code}", $branch_date);
           $is_variable = true;
           break;
       }
@@ -165,22 +165,22 @@
   private function validateAsBranchName($name) {
     $errors = array();
 
-    if (preg_match('{^/}', $name) || preg_match('{/$}', $name)) {
+    if (@preg_match('{^/}', $name) || @preg_match('{/$}', $name)) {
       $errors[] = pht("Branches cannot begin or end with '%s'", '/');
     }
 
-    if (preg_match('{//+}', $name)) {
+    if (@preg_match('{//+}', $name)) {
       $errors[] = pht("Branches cannot contain multiple consecutive '%s'", '/');
     }
 
-    $parts = array_filter(explode('/', $name));
+    $parts = array_filter(@explode('/', $name));
     foreach ($parts as $index => $part) {
       $part_error = null;
-      if (preg_match('{^\.}', $part) || preg_match('{\.$}', $part)) {
+      if (@preg_match('{^\.}', $part) || @preg_match('{\.$}', $part)) {
         $errors[] = pht("Path components cannot begin or end with '%s'", '.');
-      } else if (preg_match('{^(?!\w)}', $part)) {
+      } else if (@preg_match('{^(?!\w)}', $part)) {
         $errors[] = pht('Path components must begin with an alphanumeric.');
-      } else if (!preg_match('{^\w ([\w-_%\.]* [\w-_%])?$}x', $part)) {
+      } else if (!@preg_match('{^\w ([\w-_%\.]* [\w-_%])?$}x', $part)) {
         $errors[] = pht(
           "Path components may only contain alphanumerics ".
           "or '%s', '%s' or '%s'.",
diff --git a/src/applications/repository/daemon/PhabricatorGitGraphStream.php b/src/applications/repository/daemon/PhabricatorGitGraphStream.php
--- a/src/applications/repository/daemon/PhabricatorGitGraphStream.php
+++ b/src/applications/repository/daemon/PhabricatorGitGraphStream.php
@@ -64,13 +64,13 @@
       $gitlog->next();
 
       $line = trim($line);
-      if (!strlen($line)) {
+      if (!@strlen($line)) {
         break;
       }
-      list($hash, $parents, $epoch) = explode("\1", $line);
+      list($hash, $parents, $epoch) = @explode("\1", $line);
 
       if ($parents) {
-        $parents = explode(' ', $parents);
+        $parents = @explode(' ', $parents);
       } else {
         // First commit.
         $parents = array();
diff --git a/src/applications/repository/daemon/PhabricatorMercurialGraphStream.php b/src/applications/repository/daemon/PhabricatorMercurialGraphStream.php
--- a/src/applications/repository/daemon/PhabricatorMercurialGraphStream.php
+++ b/src/applications/repository/daemon/PhabricatorMercurialGraphStream.php
@@ -82,13 +82,13 @@
       $hglog->next();
 
       $line = trim($line);
-      if (!strlen($line)) {
+      if (!@strlen($line)) {
         break;
       }
-      list($rev, $node, $date, $parents) = explode("\1", $line);
+      list($rev, $node, $date, $parents) = @explode("\1", $line);
 
       $rev  = (int)$rev;
-      $date = (int)head(explode('.', $date));
+      $date = (int)head(@explode('.', $date));
 
       $this->dates[$node]        = $date;
       $this->local[$rev]         = $node;
@@ -119,12 +119,12 @@
     //  151:1f6c61a60586 154:1d5f799ebe1e
 
     $parents = trim($parents);
-    if (strlen($parents)) {
+    if (@strlen($parents)) {
       $local = array();
 
-      $parents = explode(' ', $parents);
+      $parents = @explode(' ', $parents);
       foreach ($parents as $key => $parent) {
-        $parent = (int)head(explode(':', $parent));
+        $parent = (int)head(@explode(':', $parent));
         if ($parent == -1) {
           // Initial commits will sometimes have "-1" as a parent.
           continue;
diff --git a/src/applications/repository/daemon/PhabricatorRepositoryPullLocalDaemon.php b/src/applications/repository/daemon/PhabricatorRepositoryPullLocalDaemon.php
--- a/src/applications/repository/daemon/PhabricatorRepositoryPullLocalDaemon.php
+++ b/src/applications/repository/daemon/PhabricatorRepositoryPullLocalDaemon.php
@@ -506,7 +506,7 @@
       return PhabricatorTime::getNow() + $smart_wait;
     }
 
-    if (strlen($stderr)) {
+    if (@strlen($stderr)) {
       $stderr_msg = pht(
         'Unexpected output while updating repository "%s": %s',
         $display_name,
diff --git a/src/applications/repository/editor/PhabricatorRepositoryEditor.php b/src/applications/repository/editor/PhabricatorRepositoryEditor.php
--- a/src/applications/repository/editor/PhabricatorRepositoryEditor.php
+++ b/src/applications/repository/editor/PhabricatorRepositoryEditor.php
@@ -50,7 +50,7 @@
     // If the repository does not have a local path yet, assign it one based
     // on its ID. We can't do this earlier because we won't have an ID yet.
     $local_path = $object->getLocalPath();
-    if (!strlen($local_path)) {
+    if (!@strlen($local_path)) {
       $local_key = 'repository.default-local-path';
 
       $local_root = PhabricatorEnv::getEnvConfig($local_key);
diff --git a/src/applications/repository/engine/PhabricatorRepositoryDiscoveryEngine.php b/src/applications/repository/engine/PhabricatorRepositoryDiscoveryEngine.php
--- a/src/applications/repository/engine/PhabricatorRepositoryDiscoveryEngine.php
+++ b/src/applications/repository/engine/PhabricatorRepositoryDiscoveryEngine.php
@@ -259,7 +259,7 @@
           $repository->getSubversionBaseURI($at_rev));
       } catch (CommandException $ex) {
         $stderr = $ex->getStderr();
-        if (preg_match('/(path|File) not found/', $stderr)) {
+        if (@preg_match('/(path|File) not found/', $stderr)) {
           // We've gone all the way back through history and this path was not
           // affected by earlier commits.
           break;
@@ -442,7 +442,7 @@
       // If the epoch is not present at all, treat it as though it stores the
       // value "0". For discussion, see T12062. This behavior is consistent
       // with the behavior of "git show".
-      if (!strlen($epoch)) {
+      if (!@strlen($epoch)) {
         $epoch = 0;
       }
 
diff --git a/src/applications/repository/engine/PhabricatorRepositoryMirrorEngine.php b/src/applications/repository/engine/PhabricatorRepositoryMirrorEngine.php
--- a/src/applications/repository/engine/PhabricatorRepositoryMirrorEngine.php
+++ b/src/applications/repository/engine/PhabricatorRepositoryMirrorEngine.php
@@ -86,7 +86,7 @@
 
     list($stdout) = $repository->execxLocalCommand(
       'for-each-ref --count 1 --');
-    if (!strlen($stdout)) {
+    if (!@strlen($stdout)) {
       return;
     }
 
@@ -122,7 +122,7 @@
         ->setCWD($repository->getLocalPath())
         ->resolvex();
     } catch (CommandException $ex) {
-      if (preg_match('/no changes found/', $ex->getStdout())) {
+      if (@preg_match('/no changes found/', $ex->getStdout())) {
         // mercurial says nothing changed, but that's good
       } else {
         throw $ex;
diff --git a/src/applications/repository/engine/PhabricatorRepositoryPullEngine.php b/src/applications/repository/engine/PhabricatorRepositoryPullEngine.php
--- a/src/applications/repository/engine/PhabricatorRepositoryPullEngine.php
+++ b/src/applications/repository/engine/PhabricatorRepositoryPullEngine.php
@@ -238,7 +238,7 @@
     $identifier = $repository->getPHID();
 
     $instance = PhabricatorEnv::getEnvConfig('cluster.instance');
-    if (strlen($instance)) {
+    if (@strlen($instance)) {
       $identifier = "{$identifier}:{$instance}";
     }
 
@@ -559,7 +559,7 @@
       // refuse to list any refs beginning with "-" just in case.
 
       foreach ($ref_rules as $ref_rule) {
-        if (preg_match('/^-/', $ref_rule)) {
+        if (@preg_match('/^-/', $ref_rule)) {
           throw new Exception(
             pht(
               'Refusing to list potentially dangerous ref ("%s") beginning '.
@@ -575,7 +575,7 @@
       $ref_rules);
 
     // Empty repositories don't have any refs.
-    if (!strlen(rtrim($stdout))) {
+    if (!@strlen(rtrim($stdout))) {
       return array();
     }
 
@@ -590,7 +590,7 @@
       }
 
       // If the remote ref is itself a remote ref, ignore it.
-      if (preg_match('(^refs/remotes/)', $name)) {
+      if (@preg_match('(^refs/remotes/)', $name)) {
         continue;
       }
 
@@ -733,7 +733,7 @@
 
       // TODO: Remove this once we're far enough in the future that deployment
       // of 2.1 is exceedingly rare?
-      if ($err == 1 && preg_match('/no changes found/', $stdout)) {
+      if ($err == 1 && @preg_match('/no changes found/', $stdout)) {
         return;
       } else {
         $message = $ex->getMessage();
diff --git a/src/applications/repository/engine/PhabricatorRepositoryRefEngine.php b/src/applications/repository/engine/PhabricatorRepositoryRefEngine.php
--- a/src/applications/repository/engine/PhabricatorRepositoryRefEngine.php
+++ b/src/applications/repository/engine/PhabricatorRepositoryRefEngine.php
@@ -458,7 +458,7 @@
         }
 
         $stdout = trim($stdout);
-        if (!strlen($stdout)) {
+        if (!@strlen($stdout)) {
           return array();
         }
         return phutil_split_lines($stdout, $retain_newlines = false);
@@ -492,7 +492,7 @@
         }
 
         $stdout = trim($stdout);
-        if (!strlen($stdout)) {
+        if (!@strlen($stdout)) {
           return array();
         }
         return phutil_split_lines($stdout, $retain_newlines = false);
diff --git a/src/applications/repository/management/PhabricatorRepositoryManagementMaintenanceWorkflow.php b/src/applications/repository/management/PhabricatorRepositoryManagementMaintenanceWorkflow.php
--- a/src/applications/repository/management/PhabricatorRepositoryManagementMaintenanceWorkflow.php
+++ b/src/applications/repository/management/PhabricatorRepositoryManagementMaintenanceWorkflow.php
@@ -42,7 +42,7 @@
     }
 
     $message = $args->getArg('start');
-    $is_start = (bool)strlen($message);
+    $is_start = (bool)@strlen($message);
     $is_stop = $args->getArg('stop');
 
     if (!$is_start && !$is_stop) {
diff --git a/src/applications/repository/management/PhabricatorRepositoryManagementMovePathsWorkflow.php b/src/applications/repository/management/PhabricatorRepositoryManagementMovePathsWorkflow.php
--- a/src/applications/repository/management/PhabricatorRepositoryManagementMovePathsWorkflow.php
+++ b/src/applications/repository/management/PhabricatorRepositoryManagementMovePathsWorkflow.php
@@ -38,14 +38,14 @@
     }
 
     $from = $args->getArg('from');
-    if (!strlen($from)) {
+    if (!@strlen($from)) {
       throw new Exception(
         pht(
           'You must specify a path prefix to move from with --from.'));
     }
 
     $to = $args->getArg('to');
-    if (!strlen($to)) {
+    if (!@strlen($to)) {
       throw new Exception(
         pht(
           'You must specify a path prefix to move to with --to.'));
@@ -67,10 +67,10 @@
         'dst' => '',
       );
 
-      if (strncmp($src, $from, strlen($from))) {
+      if (strncmp($src, $from, @strlen($from))) {
         $row['action'] = pht('Ignore');
       } else {
-        $dst = $to.substr($src, strlen($from));
+        $dst = $to.@substr($src, @strlen($from));
 
         $row['action'] = tsprintf('**%s**', pht('Move'));
         $row['dst'] = $dst;
diff --git a/src/applications/repository/management/PhabricatorRepositoryManagementRebuildIdentitiesWorkflow.php b/src/applications/repository/management/PhabricatorRepositoryManagementRebuildIdentitiesWorkflow.php
--- a/src/applications/repository/management/PhabricatorRepositoryManagementRebuildIdentitiesWorkflow.php
+++ b/src/applications/repository/management/PhabricatorRepositoryManagementRebuildIdentitiesWorkflow.php
@@ -220,7 +220,7 @@
 
       $committer_name = $data->getCommitterString();
       $committer_phid = $commit->getCommitterIdentityPHID();
-      if (strlen($committer_name)) {
+      if (@strlen($committer_name)) {
         $committer_identity = $this->getIdentityForCommit(
           $commit,
           $committer_name);
diff --git a/src/applications/repository/phid/PhabricatorRepositoryCommitPHIDType.php b/src/applications/repository/phid/PhabricatorRepositoryCommitPHIDType.php
--- a/src/applications/repository/phid/PhabricatorRepositoryCommitPHIDType.php
+++ b/src/applications/repository/phid/PhabricatorRepositoryCommitPHIDType.php
@@ -71,7 +71,7 @@
       }
 
       $summary = $commit->getSummary();
-      if (strlen($summary)) {
+      if (@strlen($summary)) {
         $full_name = $name.': '.$summary;
       } else {
         $full_name = $name;
@@ -98,7 +98,7 @@
 
   public function canLoadNamedObject($name) {
     $pattern = self::getCommitObjectNamePattern();
-    return preg_match('(^'.$pattern.'$)', $name);
+    return @preg_match('(^'.$pattern.'$)', $name);
   }
 
   public function loadNamedObjects(
diff --git a/src/applications/repository/phid/PhabricatorRepositoryRepositoryPHIDType.php b/src/applications/repository/phid/PhabricatorRepositoryRepositoryPHIDType.php
--- a/src/applications/repository/phid/PhabricatorRepositoryRepositoryPHIDType.php
+++ b/src/applications/repository/phid/PhabricatorRepositoryRepositoryPHIDType.php
@@ -54,7 +54,7 @@
   }
 
   public function canLoadNamedObject($name) {
-    return preg_match('/^(r[A-Z]+|R[1-9]\d*)\z/', $name);
+    return @preg_match('/^(r[A-Z]+|R[1-9]\d*)\z/', $name);
   }
 
   public function loadNamedObjects(
@@ -64,9 +64,9 @@
     $results = array();
     $id_map = array();
     foreach ($names as $key => $name) {
-      $id = substr($name, 1);
+      $id = @substr($name, 1);
       $id_map[$id][] = $name;
-      $names[$key] = substr($name, 1);
+      $names[$key] = @substr($name, 1);
     }
 
     $query = id(new PhabricatorRepositoryQuery())
diff --git a/src/applications/repository/query/PhabricatorRepositoryQuery.php b/src/applications/repository/query/PhabricatorRepositoryQuery.php
--- a/src/applications/repository/query/PhabricatorRepositoryQuery.php
+++ b/src/applications/repository/query/PhabricatorRepositoryQuery.php
@@ -67,7 +67,7 @@
         continue;
       }
 
-      if (preg_match('/^(r[A-Z]+|R[1-9]\d*)\z/', $identifier)) {
+      if (@preg_match('/^(r[A-Z]+|R[1-9]\d*)\z/', $identifier)) {
         $monograms[$identifier] = $identifier;
         continue;
       }
@@ -78,7 +78,7 @@
         continue;
       }
 
-      if (preg_match('/^[A-Z]+\z/', $identifier)) {
+      if (@preg_match('/^[A-Z]+\z/', $identifier)) {
         $callsigns[$identifier] = $identifier;
         continue;
       }
@@ -588,9 +588,9 @@
 
         foreach ($this->monogramIdentifiers as $identifier) {
           if ($identifier[0] == 'r') {
-            $monogram_callsigns[] = substr($identifier, 1);
+            $monogram_callsigns[] = @substr($identifier, 1);
           } else {
-            $monogram_ids[] = substr($identifier, 1);
+            $monogram_ids[] = @substr($identifier, 1);
           }
         }
 
@@ -633,11 +633,11 @@
         $this->uuids);
     }
 
-    if (strlen($this->datasourceQuery)) {
+    if (@strlen($this->datasourceQuery)) {
       // This handles having "rP" match callsigns starting with "P...".
       $query = trim($this->datasourceQuery);
-      if (preg_match('/^r/', $query)) {
-        $callsign = substr($query, 1);
+      if (@preg_match('/^r/', $query)) {
+        $callsign = @substr($query, 1);
       } else {
         $callsign = $query;
       }
diff --git a/src/applications/repository/query/PhabricatorRepositoryRefCursorQuery.php b/src/applications/repository/query/PhabricatorRepositoryRefCursorQuery.php
--- a/src/applications/repository/query/PhabricatorRepositoryRefCursorQuery.php
+++ b/src/applications/repository/query/PhabricatorRepositoryRefCursorQuery.php
@@ -136,7 +136,7 @@
         $name_hashes);
     }
 
-    if (strlen($this->datasourceQuery)) {
+    if (@strlen($this->datasourceQuery)) {
       $where[] = qsprintf(
         $conn,
         'refNameRaw LIKE %>',
diff --git a/src/applications/repository/response/PhabricatorVCSResponse.php b/src/applications/repository/response/PhabricatorVCSResponse.php
--- a/src/applications/repository/response/PhabricatorVCSResponse.php
+++ b/src/applications/repository/response/PhabricatorVCSResponse.php
@@ -47,7 +47,7 @@
     }
 
     $message = $this->getMessage();
-    if (strlen($message)) {
+    if (@strlen($message)) {
       foreach (phutil_split_lines($message, false) as $line) {
         $headers[] = array(
           'X-Phabricator-Message',
diff --git a/src/applications/repository/storage/PhabricatorRepository.php b/src/applications/repository/storage/PhabricatorRepository.php
--- a/src/applications/repository/storage/PhabricatorRepository.php
+++ b/src/applications/repository/storage/PhabricatorRepository.php
@@ -193,7 +193,7 @@
 
   public function getMonogram() {
     $callsign = $this->getCallsign();
-    if (strlen($callsign)) {
+    if (@strlen($callsign)) {
       return "r{$callsign}";
     }
 
@@ -203,7 +203,7 @@
 
   public function getDisplayName() {
     $slug = $this->getRepositorySlug();
-    if (strlen($slug)) {
+    if (@strlen($slug)) {
       return $slug;
     }
 
@@ -216,7 +216,7 @@
     $monograms[] = 'R'.$this->getID();
 
     $callsign = $this->getCallsign();
-    if (strlen($callsign)) {
+    if (@strlen($callsign)) {
       $monograms[] = 'r'.$callsign;
     }
 
@@ -281,7 +281,7 @@
 
   public function getSubversionBaseURI($commit = null) {
     $subpath = $this->getDetail('svn-subpath');
-    if (!strlen($subpath)) {
+    if (!@strlen($subpath)) {
       $subpath = null;
     }
     return $this->getSubversionPathURI($subpath, $commit);
@@ -301,7 +301,7 @@
 
     $uri = rtrim($uri, '/');
 
-    if (strlen($path)) {
+    if (@strlen($path)) {
       $path = rawurlencode($path);
       $path = str_replace('%2F', '/', $path);
       $uri = $uri.'/'.ltrim($path, '/');
@@ -342,12 +342,12 @@
 
     // Make some reasonable effort to produce reasonable default directory
     // names from repository names.
-    if (!strlen($name)) {
+    if (!@strlen($name)) {
       $name = $this->getName();
       $name = phutil_utf8_strtolower($name);
       $name = preg_replace('@[ -/:->]+@', '-', $name);
       $name = trim($name, '-');
-      if (!strlen($name)) {
+      if (!@strlen($name)) {
         $name = $this->getCallsign();
       }
     }
@@ -365,14 +365,14 @@
   }
 
   public static function assertValidRepositorySlug($slug) {
-    if (!strlen($slug)) {
+    if (!@strlen($slug)) {
       throw new Exception(
         pht(
           'The empty string is not a valid repository short name. '.
           'Repository short names must be at least one character long.'));
     }
 
-    if (strlen($slug) > 64) {
+    if (@strlen($slug) > 64) {
       throw new Exception(
         pht(
           'The name "%s" is not a valid repository short name. Repository '.
@@ -380,7 +380,7 @@
           $slug));
     }
 
-    if (preg_match('/[^a-zA-Z0-9._-]/', $slug)) {
+    if (@preg_match('/[^a-zA-Z0-9._-]/', $slug)) {
       throw new Exception(
         pht(
           'The name "%s" is not a valid repository short name. Repository '.
@@ -389,7 +389,7 @@
           $slug));
     }
 
-    if (!preg_match('/^[a-zA-Z0-9]/', $slug)) {
+    if (!@preg_match('/^[a-zA-Z0-9]/', $slug)) {
       throw new Exception(
         pht(
           'The name "%s" is not a valid repository short name. Repository '.
@@ -397,7 +397,7 @@
           $slug));
     }
 
-    if (!preg_match('/[a-zA-Z0-9]\z/', $slug)) {
+    if (!@preg_match('/[a-zA-Z0-9]\z/', $slug)) {
       throw new Exception(
         pht(
           'The name "%s" is not a valid repository short name. Repository '.
@@ -405,7 +405,7 @@
           $slug));
     }
 
-    if (preg_match('/__|--|\\.\\./', $slug)) {
+    if (@preg_match('/__|--|\\.\\./', $slug)) {
       throw new Exception(
         pht(
           'The name "%s" is not a valid repository short name. Repository '.
@@ -414,7 +414,7 @@
           $slug));
     }
 
-    if (preg_match('/^[A-Z]+\z/', $slug)) {
+    if (@preg_match('/^[A-Z]+\z/', $slug)) {
       throw new Exception(
         pht(
           'The name "%s" is not a valid repository short name. Repository '.
@@ -422,7 +422,7 @@
           $slug));
     }
 
-    if (preg_match('/^\d+\z/', $slug)) {
+    if (@preg_match('/^\d+\z/', $slug)) {
       throw new Exception(
         pht(
           'The name "%s" is not a valid repository short name. Repository '.
@@ -430,7 +430,7 @@
           $slug));
     }
 
-    if (preg_match('/\\.git/', $slug)) {
+    if (@preg_match('/\\.git/', $slug)) {
       throw new Exception(
         pht(
           'The name "%s" is not a valid repository short name. Repository '.
@@ -441,13 +441,13 @@
   }
 
   public static function assertValidCallsign($callsign) {
-    if (!strlen($callsign)) {
+    if (!@strlen($callsign)) {
       throw new Exception(
         pht(
           'A repository callsign must be at least one character long.'));
     }
 
-    if (strlen($callsign) > 32) {
+    if (@strlen($callsign) > 32) {
       throw new Exception(
         pht(
           'The callsign "%s" is not a valid repository callsign. Callsigns '.
@@ -455,7 +455,7 @@
           $callsign));
     }
 
-    if (!preg_match('/^[A-Z]+\z/', $callsign)) {
+    if (!@preg_match('/^[A-Z]+\z/', $callsign)) {
       throw new Exception(
         pht(
           'The callsign "%s" is not a valid repository callsign. Callsigns '.
@@ -574,12 +574,12 @@
 
   public function getURI() {
     $short_name = $this->getRepositorySlug();
-    if (strlen($short_name)) {
+    if (@strlen($short_name)) {
       return "/source/{$short_name}/";
     }
 
     $callsign = $this->getCallsign();
-    if (strlen($callsign)) {
+    if (@strlen($callsign)) {
       return "/diffusion/{$callsign}/";
     }
 
@@ -593,7 +593,7 @@
 
   public function getCommitURI($identifier) {
     $callsign = $this->getCallsign();
-    if (strlen($callsign)) {
+    if (@strlen($callsign)) {
       return "/r{$callsign}{$identifier}";
     }
 
@@ -614,7 +614,7 @@
     $identifier = null;
     foreach ($patterns as $pattern) {
       $matches = null;
-      if (!preg_match($pattern, $request_path, $matches)) {
+      if (!@preg_match($pattern, $request_path, $matches)) {
         continue;
       }
 
@@ -648,7 +648,7 @@
       '\z)';
 
     $matches = null;
-    if (preg_match($standard_pattern, $request_path, $matches)) {
+    if (@preg_match($standard_pattern, $request_path, $matches)) {
       $suffix = $matches['suffix'];
       return $this->getPathURI($suffix);
     }
@@ -667,7 +667,7 @@
       '\z)';
 
     $matches = null;
-    if (preg_match($commit_pattern, $request_path, $matches)) {
+    if (@preg_match($commit_pattern, $request_path, $matches)) {
       $commit = $matches['commit'];
       return $this->getCommitURI($commit);
     }
@@ -718,14 +718,14 @@
     $head = idx($params, 'head');
     $against = idx($params, 'against');
 
-    if ($req_commit && !strlen($commit)) {
+    if ($req_commit && !@strlen($commit)) {
       throw new Exception(
         pht(
           'Diffusion URI action "%s" requires commit!',
           $action));
     }
 
-    if ($req_branch && !strlen($branch)) {
+    if ($req_branch && !@strlen($branch)) {
       throw new Exception(
         pht(
           'Diffusion URI action "%s" requires branch!',
@@ -736,25 +736,25 @@
       return $this->getCommitURI($commit);
     }
 
-    if (strlen($path)) {
+    if (@strlen($path)) {
       $path = ltrim($path, '/');
       $path = str_replace(array(';', '$'), array(';;', '$$'), $path);
       $path = phutil_escape_uri($path);
     }
 
     $raw_branch = $branch;
-    if (strlen($branch)) {
+    if (@strlen($branch)) {
       $branch = phutil_escape_uri_path_component($branch);
       $path = "{$branch}/{$path}";
     }
 
     $raw_commit = $commit;
-    if (strlen($commit)) {
+    if (@strlen($commit)) {
       $commit = str_replace('$', '$$', $commit);
       $commit = ';'.phutil_escape_uri($commit);
     }
 
-    if (strlen($line)) {
+    if (@strlen($line)) {
       $line = '$'.phutil_escape_uri($line);
     }
 
@@ -775,20 +775,20 @@
         break;
       case 'compare':
         $uri = $this->getPathURI("/{$action}/");
-        if (strlen($head)) {
+        if (@strlen($head)) {
           $query['head'] = $head;
-        } else if (strlen($raw_commit)) {
+        } else if (@strlen($raw_commit)) {
           $query['commit'] = $raw_commit;
-        } else if (strlen($raw_branch)) {
+        } else if (@strlen($raw_branch)) {
           $query['head'] = $raw_branch;
         }
 
-        if (strlen($against)) {
+        if (@strlen($against)) {
           $query['against'] = $against;
         }
         break;
       case 'branch':
-        if (strlen($path)) {
+        if (@strlen($path)) {
           $uri = $this->getPathURI("/repository/{$path}");
         } else {
           $uri = $this->getPathURI('/');
@@ -862,7 +862,7 @@
 
   public function getDefaultBranch() {
     $default = $this->getDetail('default-branch');
-    if (strlen($default)) {
+    if (@strlen($default)) {
       return $default;
     }
 
@@ -909,7 +909,7 @@
     foreach ($filter as $pattern => $ignored) {
       $regexp = self::extractBranchRegexp($pattern);
       if ($regexp !== null) {
-        if (preg_match($regexp, $branch)) {
+        if (@preg_match($regexp, $branch)) {
           return true;
         }
       }
@@ -921,7 +921,7 @@
 
   public static function extractBranchRegexp($pattern) {
     $matches = null;
-    if (preg_match('/^regexp\\((.*)\\)\z/', $pattern, $matches)) {
+    if (@preg_match('/^regexp\\((.*)\\)\z/', $pattern, $matches)) {
       return $matches[1];
     }
     return null;
@@ -930,7 +930,7 @@
   public function shouldTrackRef(DiffusionRepositoryRef $ref) {
     // At least for now, don't track the staging area tags.
     if ($ref->isTag()) {
-      if (preg_match('(^phabricator/)', $ref->getShortName())) {
+      if (@preg_match('(^phabricator/)', $ref->getShortName())) {
         return false;
       }
     }
@@ -959,7 +959,7 @@
     $is_git = ($vcs == $type_git);
     $is_hg = ($vcs == $type_hg);
     if ($is_git || $is_hg) {
-      $name = substr($commit_identifier, 0, 12);
+      $name = @substr($commit_identifier, 0, 12);
       $need_scope = false;
     } else {
       $name = $commit_identifier;
@@ -1156,7 +1156,7 @@
    */
   public function getRemoteURIObject() {
     $raw_uri = $this->getDetail('remote-uri');
-    if (!strlen($raw_uri)) {
+    if (!@strlen($raw_uri)) {
       return new PhutilURI('');
     }
 
@@ -1186,7 +1186,7 @@
 
         // If the trailing "@" is not required to escape the URI, strip it for
         // readability.
-        if (!preg_match('/@.*@/', $path)) {
+        if (!@preg_match('/@.*@/', $path)) {
           $path = rtrim($path, '@');
         }
 
@@ -1645,7 +1645,7 @@
     // for discussion. This is usually a user adding "ssh://" to an implicit
     // SSH Git URI.
     if ($protocol == 'ssh') {
-      if (preg_match('(^[^:@]+://[^/:]+:[^\d])', $uri)) {
+      if (@preg_match('(^[^:@]+://[^/:]+:[^\d])', $uri)) {
         throw new Exception(
           pht(
             "The remote URI is not formatted correctly. Remote URIs ".
@@ -2299,14 +2299,14 @@
       );
       foreach ($git_env as $key) {
         $value = getenv($key);
-        if (strlen($value)) {
+        if (@strlen($value)) {
           $env[$key] = $value;
         }
       }
 
       $key = 'GIT_PUSH_OPTION_COUNT';
       $git_count = getenv($key);
-      if (strlen($git_count)) {
+      if (@strlen($git_count)) {
         $git_count = (int)$git_count;
         $env[$key] = $git_count;
         for ($ii = 0; $ii < $git_count; $ii++) {
@@ -2322,7 +2322,7 @@
       // need to be preserved to allow `git` operations to work properly when
       // running from commit hooks.
       if ($this->isGit()) {
-        if (preg_match('/^GIT_/', $key)) {
+        if (@preg_match('/^GIT_/', $key)) {
           $result[$key] = $value;
         }
       }
@@ -2477,7 +2477,7 @@
       $has_https = false;
     }
 
-    $has_ssh = (bool)strlen(PhabricatorEnv::getEnvConfig('phd.user'));
+    $has_ssh = (bool)@strlen(PhabricatorEnv::getEnvConfig('phd.user'));
 
     $protocol_map = array(
       PhabricatorRepositoryURI::BUILTIN_PROTOCOL_SSH => $has_ssh,
@@ -2815,7 +2815,7 @@
     $permanent_rules = $this->getStringListForConduit($permanent_rules);
 
     $default_branch = $this->getDefaultBranch();
-    if (!strlen($default_branch)) {
+    if (!@strlen($default_branch)) {
       $default_branch = null;
     }
 
@@ -2846,7 +2846,7 @@
 
     foreach ($list as $key => $value) {
       $value = (string)$value;
-      if (!strlen($value)) {
+      if (!@strlen($value)) {
         unset($list[$key]);
       }
     }
diff --git a/src/applications/repository/storage/PhabricatorRepositoryCommit.php b/src/applications/repository/storage/PhabricatorRepositoryCommit.php
--- a/src/applications/repository/storage/PhabricatorRepositoryCommit.php
+++ b/src/applications/repository/storage/PhabricatorRepositoryCommit.php
@@ -478,7 +478,7 @@
     }
 
     $author = $this->getRawAuthorStringForDisplay();
-    if (strlen($author)) {
+    if (@strlen($author)) {
       return DiffusionView::renderName($author);
     }
 
@@ -493,7 +493,7 @@
     }
 
     $committer = $this->getRawCommitterStringForDisplay();
-    if (strlen($committer)) {
+    if (@strlen($committer)) {
       return DiffusionView::renderName($committer);
     }
 
diff --git a/src/applications/repository/storage/PhabricatorRepositoryCommitData.php b/src/applications/repository/storage/PhabricatorRepositoryCommitData.php
--- a/src/applications/repository/storage/PhabricatorRepositoryCommitData.php
+++ b/src/applications/repository/storage/PhabricatorRepositoryCommitData.php
@@ -97,12 +97,12 @@
     $ref = $this->getCommitRef();
 
     $author = $ref->getAuthor();
-    if (strlen($author)) {
+    if (@strlen($author)) {
       return $author;
     }
 
     $author = phutil_string_cast($this->authorName);
-    if (strlen($author)) {
+    if (@strlen($author)) {
       return $author;
     }
 
@@ -131,7 +131,7 @@
     $ref = $this->getCommitRef();
 
     $committer = $ref->getCommitter();
-    if (strlen($committer)) {
+    if (@strlen($committer)) {
       return $committer;
     }
 
@@ -150,7 +150,7 @@
     $string = $this->getCommitDetail($key);
     $string = phutil_string_cast($string);
 
-    if (strlen($string)) {
+    if (@strlen($string)) {
       return $string;
     }
 
diff --git a/src/applications/repository/storage/PhabricatorRepositoryIdentity.php b/src/applications/repository/storage/PhabricatorRepositoryIdentity.php
--- a/src/applications/repository/storage/PhabricatorRepositoryIdentity.php
+++ b/src/applications/repository/storage/PhabricatorRepositoryIdentity.php
@@ -121,7 +121,7 @@
 
     $byte_limit = $this->getColumnMaximumByteLength('emailAddress');
     $email_address = phutil_utf8ize($email_address);
-    if (strlen($email_address) > $byte_limit) {
+    if (@strlen($email_address) > $byte_limit) {
       $email_address = null;
     }
 
diff --git a/src/applications/repository/storage/PhabricatorRepositoryPushLog.php b/src/applications/repository/storage/PhabricatorRepositoryPushLog.php
--- a/src/applications/repository/storage/PhabricatorRepositoryPushLog.php
+++ b/src/applications/repository/storage/PhabricatorRepositoryPushLog.php
@@ -175,14 +175,14 @@
     if ($this->getRepository()->isSVN()) {
       return $this->getRefOld();
     }
-    return substr($this->getRefOld(), 0, 12);
+    return @substr($this->getRefOld(), 0, 12);
   }
 
   public function getRefNewShort() {
     if ($this->getRepository()->isSVN()) {
       return $this->getRefNew();
     }
-    return substr($this->getRefNew(), 0, 12);
+    return @substr($this->getRefNew(), 0, 12);
   }
 
   public function hasChangeFlags($mask) {
diff --git a/src/applications/repository/storage/PhabricatorRepositoryURI.php b/src/applications/repository/storage/PhabricatorRepositoryURI.php
--- a/src/applications/repository/storage/PhabricatorRepositoryURI.php
+++ b/src/applications/repository/storage/PhabricatorRepositoryURI.php
@@ -754,7 +754,7 @@
     // without requiring an index rebuild.
 
     $ssh_host = PhabricatorEnv::getEnvConfig('diffusion.ssh-host');
-    if (strlen($ssh_host)) {
+    if (@strlen($ssh_host)) {
       $domain_map['<ssh-host>'] = $ssh_host;
     }
 
diff --git a/src/applications/repository/storage/PhabricatorRepositoryURIIndex.php b/src/applications/repository/storage/PhabricatorRepositoryURIIndex.php
--- a/src/applications/repository/storage/PhabricatorRepositoryURIIndex.php
+++ b/src/applications/repository/storage/PhabricatorRepositoryURIIndex.php
@@ -32,7 +32,7 @@
 
     $sql = array();
     foreach ($uris as $key => $uri) {
-      if (!strlen($uri)) {
+      if (!@strlen($uri)) {
         unset($uris[$key]);
         continue;
       }
diff --git a/src/applications/repository/storage/__tests__/PhabricatorRepositoryCommitTestCase.php b/src/applications/repository/storage/__tests__/PhabricatorRepositoryCommitTestCase.php
--- a/src/applications/repository/storage/__tests__/PhabricatorRepositoryCommitTestCase.php
+++ b/src/applications/repository/storage/__tests__/PhabricatorRepositoryCommitTestCase.php
@@ -30,7 +30,7 @@
     foreach ($map as $input => $expect) {
       $actual = PhabricatorRepositoryCommitData::summarizeCommitMessage(
         $input);
-      $this->assertEqual($expect, strlen($actual));
+      $this->assertEqual($expect, @strlen($actual));
     }
 
   }
diff --git a/src/applications/repository/worker/PhabricatorRepositoryPushMailWorker.php b/src/applications/repository/worker/PhabricatorRepositoryPushMailWorker.php
--- a/src/applications/repository/worker/PhabricatorRepositoryPushMailWorker.php
+++ b/src/applications/repository/worker/PhabricatorRepositoryPushMailWorker.php
@@ -216,7 +216,7 @@
       }
 
       $summary = null;
-      if (strlen(idx($commit_info, 'summary'))) {
+      if (@strlen(idx($commit_info, 'summary'))) {
         $summary = ' '.$commit_info['summary'];
       }
 
diff --git a/src/applications/repository/worker/commitchangeparser/PhabricatorRepositoryGitCommitChangeParserWorker.php b/src/applications/repository/worker/commitchangeparser/PhabricatorRepositoryGitCommitChangeParserWorker.php
--- a/src/applications/repository/worker/commitchangeparser/PhabricatorRepositoryGitCommitChangeParserWorker.php
+++ b/src/applications/repository/worker/commitchangeparser/PhabricatorRepositoryGitCommitChangeParserWorker.php
@@ -23,9 +23,9 @@
     $changes = array();
     $move_away = array();
     $copy_away = array();
-    $lines = explode("\n", $raw);
+    $lines = @explode("\n", $raw);
     foreach ($lines as $line) {
-      if (!strlen(trim($line))) {
+      if (!@strlen(trim($line))) {
         continue;
       }
       list($old_mode, $new_mode,
@@ -34,7 +34,7 @@
 
       // We may only have two pieces here.
       list($action, $src_path, $dst_path) = array_merge(
-        explode("\t", $more_stuff),
+        @explode("\t", $more_stuff),
         array(null));
 
       // Normalize the paths for consistency with the SVN workflow.
diff --git a/src/applications/repository/worker/commitchangeparser/PhabricatorRepositorySvnCommitChangeParserWorker.php b/src/applications/repository/worker/commitchangeparser/PhabricatorRepositorySvnCommitChangeParserWorker.php
--- a/src/applications/repository/worker/commitchangeparser/PhabricatorRepositorySvnCommitChangeParserWorker.php
+++ b/src/applications/repository/worker/commitchangeparser/PhabricatorRepositorySvnCommitChangeParserWorker.php
@@ -87,7 +87,7 @@
       $parents = $this->expandAllParentPaths($path, $include_self = true);
       foreach ($parents as $parent) {
         if (isset($add_paths[$parent])) {
-          $relative_path = substr($path, strlen($parent));
+          $relative_path = @substr($path, @strlen($parent));
           $lookup_here[$path] = array(
             'rawPath'   => $add_paths[$parent]['rawTargetPath'].$relative_path,
             'rawCommit' => $add_paths[$parent]['rawTargetCommit'],
@@ -180,7 +180,7 @@
           case 'A':
             $copy_from = $raw_info['rawTargetPath'];
             $copy_rev = $raw_info['rawTargetCommit'];
-            if (!strlen($copy_from)) {
+            if (!@strlen($copy_from)) {
               $type = DifferentialChangeType::TYPE_ADD;
             } else {
               if (isset($deleted_paths[$copy_from])) {
@@ -575,7 +575,7 @@
         $parent,
         $lookup['rawCommit']);
 
-      $parent = escapeshellarg($parent);
+      $parent = @escapeshellarg($parent);
       $parents[$parent] = true;
       $path_mapping[$parent][] = dirname($path);
     }
@@ -602,7 +602,7 @@
         if ($list_path == $repository_uri) {
           $base = '/';
         } else {
-          $base = substr($list_path, strlen($repository_uri));
+          $base = @substr($list_path, @strlen($repository_uri));
         }
 
         $mapping = array_pop($path_mapping);
@@ -687,7 +687,7 @@
                        '<name>(.*?)</name>'.
                        '(<size>(.*?)</size>)?@';
             $matches = null;
-            if (!preg_match($pattern, $entry, $matches)) {
+            if (!@preg_match($pattern, $entry, $matches)) {
               throw new Exception(pht('Unable to parse entry!'));
             }
             $map[html_entity_decode($matches[2])] =
@@ -715,7 +715,7 @@
           break;
         case 'xml':
           $expect = '/<?xml version="1.0".*?>/';
-          if (!preg_match($expect, $line)) {
+          if (!@preg_match($expect, $line)) {
             throw new Exception(
               pht(
                 "Expected '%s', got %s.",
@@ -747,7 +747,7 @@
           $mode = 'list2';
           break;
         case 'list2':
-          if (!preg_match('/^\s+path="/', $line)) {
+          if (!@preg_match('/^\s+path="/', $line)) {
             throw new Exception(
               pht(
                 "Expected '%s', got %s.",
@@ -781,7 +781,7 @@
     if ($include_self) {
       $parents[] = '/'.rtrim($path, '/');
     }
-    $parts = explode('/', trim($path, '/'));
+    $parts = @explode('/', trim($path, '/'));
     while (count($parts) >= 1) {
       array_pop($parts);
       $parents[] = '/'.implode('/', $parts);
diff --git a/src/applications/repository/worker/commitmessageparser/PhabricatorRepositoryCommitMessageParserWorker.php b/src/applications/repository/worker/commitmessageparser/PhabricatorRepositoryCommitMessageParserWorker.php
--- a/src/applications/repository/worker/commitmessageparser/PhabricatorRepositoryCommitMessageParserWorker.php
+++ b/src/applications/repository/worker/commitmessageparser/PhabricatorRepositoryCommitMessageParserWorker.php
@@ -36,7 +36,7 @@
 
     $author = $ref->getAuthor();
     $committer = $ref->getCommitter();
-    $has_committer = (bool)strlen($committer);
+    $has_committer = (bool)@strlen($committer);
 
     $identity_engine = id(new DiffusionRepositoryIdentityEngine())
       ->setViewer($viewer)
diff --git a/src/applications/repository/xaction/PhabricatorRepositoryCallsignTransaction.php b/src/applications/repository/xaction/PhabricatorRepositoryCallsignTransaction.php
--- a/src/applications/repository/xaction/PhabricatorRepositoryCallsignTransaction.php
+++ b/src/applications/repository/xaction/PhabricatorRepositoryCallsignTransaction.php
@@ -10,7 +10,7 @@
   }
 
   public function generateNewValue($object, $value) {
-    if (strlen($value)) {
+    if (@strlen($value)) {
       return $value;
     }
 
@@ -25,12 +25,12 @@
     $old = $this->getOldValue();
     $new = $this->getNewValue();
 
-    if (!strlen($old)) {
+    if (!@strlen($old)) {
       return pht(
         '%s set the callsign for this repository to %s.',
         $this->renderAuthor(),
         $this->renderNewValue());
-    } else if (!strlen($new)) {
+    } else if (!@strlen($new)) {
       return pht(
         '%s removed the callsign (%s) for this repository.',
         $this->renderAuthor(),
@@ -51,7 +51,7 @@
       $old = $xaction->getOldValue();
       $new = $xaction->getNewValue();
 
-      if (!strlen($new)) {
+      if (!@strlen($new)) {
         continue;
       }
 
diff --git a/src/applications/repository/xaction/PhabricatorRepositoryCopyTimeLimitTransaction.php b/src/applications/repository/xaction/PhabricatorRepositoryCopyTimeLimitTransaction.php
--- a/src/applications/repository/xaction/PhabricatorRepositoryCopyTimeLimitTransaction.php
+++ b/src/applications/repository/xaction/PhabricatorRepositoryCopyTimeLimitTransaction.php
@@ -10,7 +10,7 @@
   }
 
   public function generateNewValue($object, $value) {
-    if (!strlen($value)) {
+    if (!@strlen($value)) {
       return null;
     }
 
@@ -57,11 +57,11 @@
     foreach ($xactions as $xaction) {
       $new = $xaction->getNewValue();
 
-      if (!strlen($new)) {
+      if (!@strlen($new)) {
         continue;
       }
 
-      if (!preg_match('/^\d+\z/', $new)) {
+      if (!@preg_match('/^\d+\z/', $new)) {
         $errors[] = $this->newInvalidError(
           pht(
             'Unable to parse copy time limit, specify a positive number '.
diff --git a/src/applications/repository/xaction/PhabricatorRepositoryDefaultBranchTransaction.php b/src/applications/repository/xaction/PhabricatorRepositoryDefaultBranchTransaction.php
--- a/src/applications/repository/xaction/PhabricatorRepositoryDefaultBranchTransaction.php
+++ b/src/applications/repository/xaction/PhabricatorRepositoryDefaultBranchTransaction.php
@@ -17,12 +17,12 @@
     $old = $this->getOldValue();
     $new = $this->getNewValue();
 
-    if (!strlen($new)) {
+    if (!@strlen($new)) {
       return pht(
         '%s removed %s as the default branch.',
         $this->renderAuthor(),
         $this->renderOldValue());
-    } else if (!strlen($old)) {
+    } else if (!@strlen($old)) {
       return pht(
         '%s set the default branch to %s.',
         $this->renderAuthor(),
diff --git a/src/applications/repository/xaction/PhabricatorRepositoryEncodingTransaction.php b/src/applications/repository/xaction/PhabricatorRepositoryEncodingTransaction.php
--- a/src/applications/repository/xaction/PhabricatorRepositoryEncodingTransaction.php
+++ b/src/applications/repository/xaction/PhabricatorRepositoryEncodingTransaction.php
@@ -17,12 +17,12 @@
     $old = $this->getOldValue();
     $new = $this->getNewValue();
 
-    if (strlen($old) && !strlen($new)) {
+    if (@strlen($old) && !@strlen($new)) {
       return pht(
         '%s removed the %s encoding configured for this repository.',
         $this->renderAuthor(),
         $this->renderOldValue());
-    } else if (strlen($new) && !strlen($old)) {
+    } else if (@strlen($new) && !@strlen($old)) {
       return pht(
         '%s set the encoding for this repository to %s.',
         $this->renderAuthor(),
@@ -46,7 +46,7 @@
       // UTF-8 to the target encoding, because mbstring is fine with
       // converting from a nonsense encoding.
       $encoding = $xaction->getNewValue();
-      if (!strlen($encoding)) {
+      if (!@strlen($encoding)) {
         continue;
       }
 
diff --git a/src/applications/repository/xaction/PhabricatorRepositoryFetchRefsTransaction.php b/src/applications/repository/xaction/PhabricatorRepositoryFetchRefsTransaction.php
--- a/src/applications/repository/xaction/PhabricatorRepositoryFetchRefsTransaction.php
+++ b/src/applications/repository/xaction/PhabricatorRepositoryFetchRefsTransaction.php
@@ -61,7 +61,7 @@
           continue;
         }
 
-        if (!strlen($rule)) {
+        if (!@strlen($rule)) {
           $errors[] = $this->newInvalidError(
             pht(
               'Fetch rule (at index "%s") is empty. Fetch rules must '.
@@ -74,7 +74,7 @@
         // Since we fetch ref "X" as "+X:X", don't allow rules to include
         // colons. This is specific to Git and may not be relevant if
         // Mercurial repositories eventually get fetch rules.
-        if (preg_match('/:/', $rule)) {
+        if (@preg_match('/:/', $rule)) {
           $errors[] = $this->newInvalidError(
             pht(
               'Fetch rule ("%s", at index "%s") is invalid: fetch rules '.
diff --git a/src/applications/repository/xaction/PhabricatorRepositoryFilesizeLimitTransaction.php b/src/applications/repository/xaction/PhabricatorRepositoryFilesizeLimitTransaction.php
--- a/src/applications/repository/xaction/PhabricatorRepositoryFilesizeLimitTransaction.php
+++ b/src/applications/repository/xaction/PhabricatorRepositoryFilesizeLimitTransaction.php
@@ -10,7 +10,7 @@
   }
 
   public function generateNewValue($object, $value) {
-    if (!strlen($value)) {
+    if (!@strlen($value)) {
       return null;
     }
 
@@ -56,7 +56,7 @@
     foreach ($xactions as $xaction) {
       $new = $xaction->getNewValue();
 
-      if (!strlen($new)) {
+      if (!@strlen($new)) {
         continue;
       }
 
diff --git a/src/applications/repository/xaction/PhabricatorRepositoryIdentityAssignTransaction.php b/src/applications/repository/xaction/PhabricatorRepositoryIdentityAssignTransaction.php
--- a/src/applications/repository/xaction/PhabricatorRepositoryIdentityAssignTransaction.php
+++ b/src/applications/repository/xaction/PhabricatorRepositoryIdentityAssignTransaction.php
@@ -52,7 +52,7 @@
     foreach ($xactions as $xaction) {
       $old = $xaction->getOldValue();
       $new = $xaction->getNewValue();
-      if (!strlen($new)) {
+      if (!@strlen($new)) {
         continue;
       }
 
diff --git a/src/applications/repository/xaction/PhabricatorRepositoryMaintenanceTransaction.php b/src/applications/repository/xaction/PhabricatorRepositoryMaintenanceTransaction.php
--- a/src/applications/repository/xaction/PhabricatorRepositoryMaintenanceTransaction.php
+++ b/src/applications/repository/xaction/PhabricatorRepositoryMaintenanceTransaction.php
@@ -25,11 +25,11 @@
     $old = $this->getOldValue();
     $new = $this->getNewValue();
 
-    if (strlen($old) && !strlen($new)) {
+    if (@strlen($old) && !@strlen($new)) {
       return pht(
         '%s took this repository out of maintenance mode.',
         $this->renderAuthor());
-    } else if (!strlen($old) && strlen($new)) {
+    } else if (!@strlen($old) && @strlen($new)) {
       return pht(
         '%s put this repository into maintenance mode.',
         $this->renderAuthor());
diff --git a/src/applications/repository/xaction/PhabricatorRepositorySVNSubpathTransaction.php b/src/applications/repository/xaction/PhabricatorRepositorySVNSubpathTransaction.php
--- a/src/applications/repository/xaction/PhabricatorRepositorySVNSubpathTransaction.php
+++ b/src/applications/repository/xaction/PhabricatorRepositorySVNSubpathTransaction.php
@@ -17,12 +17,12 @@
     $old = $this->getOldValue();
     $new = $this->getNewValue();
 
-    if (!strlen($new)) {
+    if (!@strlen($new)) {
       return pht(
         '%s removed %s as the "Import Only" path.',
         $this->renderAuthor(),
         $this->renderOldValue());
-    } else if (!strlen($old)) {
+    } else if (!@strlen($old)) {
       return pht(
         '%s set the repository "Import Only" path to %s.',
         $this->renderAuthor(),
diff --git a/src/applications/repository/xaction/PhabricatorRepositoryServiceTransaction.php b/src/applications/repository/xaction/PhabricatorRepositoryServiceTransaction.php
--- a/src/applications/repository/xaction/PhabricatorRepositoryServiceTransaction.php
+++ b/src/applications/repository/xaction/PhabricatorRepositoryServiceTransaction.php
@@ -10,7 +10,7 @@
   }
 
   public function generateNewValue($object, $value) {
-    if (strlen($value)) {
+    if (@strlen($value)) {
       return $value;
     }
 
@@ -25,12 +25,12 @@
     $old = $this->getOldValue();
     $new = $this->getOldValue();
 
-    if (strlen($old) && !strlen($new)) {
+    if (@strlen($old) && !@strlen($new)) {
       return pht(
         '%s moved storage for this repository from %s to local.',
         $this->renderAuthor(),
         $this->renderOldHandle());
-    } else if (!strlen($old) && strlen($new)) {
+    } else if (!@strlen($old) && @strlen($new)) {
       // TODO: Possibly, we should distinguish between automatic assignment
       // on creation vs explicit adjustment.
       return pht(
diff --git a/src/applications/repository/xaction/PhabricatorRepositorySlugTransaction.php b/src/applications/repository/xaction/PhabricatorRepositorySlugTransaction.php
--- a/src/applications/repository/xaction/PhabricatorRepositorySlugTransaction.php
+++ b/src/applications/repository/xaction/PhabricatorRepositorySlugTransaction.php
@@ -10,7 +10,7 @@
   }
 
   public function generateNewValue($object, $value) {
-    if (strlen($value)) {
+    if (@strlen($value)) {
       return $value;
     }
 
@@ -25,11 +25,11 @@
     $old = $this->getOldValue();
     $new = $this->getNewValue();
 
-    if (strlen($old) && !strlen($new)) {
+    if (@strlen($old) && !@strlen($new)) {
       return pht(
         '%s removed the short name of this repository.',
         $this->renderAuthor());
-    } else if (strlen($new) && !strlen($old)) {
+    } else if (@strlen($new) && !@strlen($old)) {
       return pht(
         '%s set the short name of this repository to %s.',
         $this->renderAuthor(),
@@ -50,7 +50,7 @@
       $old = $xaction->getOldValue();
       $new = $xaction->getNewValue();
 
-      if (!strlen($new)) {
+      if (!@strlen($new)) {
         continue;
       }
 
diff --git a/src/applications/repository/xaction/PhabricatorRepositoryStagingURITransaction.php b/src/applications/repository/xaction/PhabricatorRepositoryStagingURITransaction.php
--- a/src/applications/repository/xaction/PhabricatorRepositoryStagingURITransaction.php
+++ b/src/applications/repository/xaction/PhabricatorRepositoryStagingURITransaction.php
@@ -17,12 +17,12 @@
     $old = $this->getOldValue();
     $new = $this->getNewValue();
 
-    if (!strlen($old)) {
+    if (!@strlen($old)) {
       return pht(
         '%s set %s as the staging area for this repository.',
         $this->renderAuthor(),
         $this->renderNewValue());
-    } else if (!strlen($new)) {
+    } else if (!@strlen($new)) {
       return pht(
         '%s removed %s as the staging area for this repository.',
         $this->renderAuthor(),
@@ -44,7 +44,7 @@
     foreach ($xactions as $xaction) {
       $new = $xaction->getNewValue();
 
-      if (!strlen($new)) {
+      if (!@strlen($new)) {
         continue;
       }
 
diff --git a/src/applications/repository/xaction/PhabricatorRepositoryTouchLimitTransaction.php b/src/applications/repository/xaction/PhabricatorRepositoryTouchLimitTransaction.php
--- a/src/applications/repository/xaction/PhabricatorRepositoryTouchLimitTransaction.php
+++ b/src/applications/repository/xaction/PhabricatorRepositoryTouchLimitTransaction.php
@@ -10,7 +10,7 @@
   }
 
   public function generateNewValue($object, $value) {
-    if (!strlen($value)) {
+    if (!@strlen($value)) {
       return null;
     }
 
@@ -56,11 +56,11 @@
     foreach ($xactions as $xaction) {
       $new = $xaction->getNewValue();
 
-      if (!strlen($new)) {
+      if (!@strlen($new)) {
         continue;
       }
 
-      if (!preg_match('/^\d+\z/', $new)) {
+      if (!@preg_match('/^\d+\z/', $new)) {
         $errors[] = $this->newInvalidError(
           pht(
             'Unable to parse touch limit, specify a positive number of '.
diff --git a/src/applications/repository/xaction/PhabricatorRepositoryTransactionType.php b/src/applications/repository/xaction/PhabricatorRepositoryTransactionType.php
--- a/src/applications/repository/xaction/PhabricatorRepositoryTransactionType.php
+++ b/src/applications/repository/xaction/PhabricatorRepositoryTransactionType.php
@@ -11,7 +11,7 @@
         // Check for invalid regular expressions.
         $regexp = PhabricatorRepository::extractBranchRegexp($pattern);
         if ($regexp !== null) {
-          $ok = @preg_match($regexp, '');
+          $ok = @@preg_match($regexp, '');
           if ($ok === false) {
             $errors[] = $this->newInvalidError(
               pht(
@@ -26,7 +26,7 @@
         // Check for formatting mistakes like `regex(...)` instead of
         // `regexp(...)`.
         $matches = null;
-        if (preg_match('/^([^(]+)\\(.*\\)\z/', $pattern, $matches)) {
+        if (@preg_match('/^([^(]+)\\(.*\\)\z/', $pattern, $matches)) {
           switch ($matches[1]) {
             case 'regexp':
               break;
diff --git a/src/applications/search/compiler/PhutilSearchQueryCompiler.php b/src/applications/search/compiler/PhutilSearchQueryCompiler.php
--- a/src/applications/search/compiler/PhutilSearchQueryCompiler.php
+++ b/src/applications/search/compiler/PhutilSearchQueryCompiler.php
@@ -104,7 +104,7 @@
   private function tokenizeQuery($query) {
     $maximum_bytes = 1024;
 
-    $query_bytes = strlen($query);
+    $query_bytes = @strlen($query);
     if ($query_bytes > $maximum_bytes) {
       throw new PhutilSearchQueryCompilerSyntaxException(
         pht(
@@ -135,7 +135,7 @@
       $character = $query[$ii];
 
       if ($mode == 'scan') {
-        if (preg_match('/^\s\z/u', $character)) {
+        if (@preg_match('/^\s\z/u', $character)) {
           continue;
         }
 
@@ -148,7 +148,7 @@
         if ($enable_functions) {
           $found = false;
           for ($jj = $ii; $jj < $length; $jj++) {
-            if (preg_match('/^[a-zA-Z-]\z/u', $query[$jj])) {
+            if (@preg_match('/^[a-zA-Z-]\z/u', $query[$jj])) {
               continue;
             }
             if ($query[$jj] == ':') {
@@ -161,7 +161,7 @@
             $function = array_slice($query, $ii, ($jj - $ii));
             $current_function = implode('', $function);
 
-            if (!strlen($current_function)) {
+            if (!@strlen($current_function)) {
               $current_function = null;
             }
 
@@ -173,12 +173,12 @@
 
       if ($mode == 'operator') {
         if (!$current_operator) {
-          if (preg_match('/^\s\z/u', $character)) {
+          if (@preg_match('/^\s\z/u', $character)) {
             continue;
           }
         }
 
-        if (preg_match('/^'.$operator_characters.'\z/', $character)) {
+        if (@preg_match('/^'.$operator_characters.'\z/', $character)) {
           $current_operator[] = $character;
           continue;
         }
@@ -187,7 +187,7 @@
       }
 
       if ($mode == 'quote') {
-        if (preg_match('/^"\z/', $character)) {
+        if (@preg_match('/^"\z/', $character)) {
           $is_quoted = true;
           $mode = 'token';
           continue;
@@ -200,18 +200,18 @@
         $capture = false;
         $was_quoted = $is_quoted;
         if ($is_quoted) {
-          if (preg_match('/^"\z/', $character)) {
+          if (@preg_match('/^"\z/', $character)) {
             $capture = true;
             $mode = 'scan';
             $is_quoted = false;
           }
         } else {
-          if (preg_match('/^\s\z/u', $character)) {
+          if (@preg_match('/^\s\z/u', $character)) {
             $capture = true;
             $mode = 'scan';
           }
 
-          if (preg_match('/^"\z/', $character)) {
+          if (@preg_match('/^"\z/', $character)) {
             $capture = true;
             $mode = 'token';
             $is_quoted = true;
@@ -293,7 +293,7 @@
             // search mode is normally useless.
             if (phutil_utf8_is_cjk($value)) {
               $use_substring = true;
-            } else if (phutil_preg_match('/^_/', $value)) {
+            } else if (phutilpreg_match('/^_/', $value)) {
               // See T13632. Assume users searching for any term that begins
               // with an undescore intend to perform substring search if they
               // don't provide an explicit search function.
@@ -314,7 +314,7 @@
               $operator_string));
       }
 
-      if (!strlen($value)) {
+      if (!@strlen($value)) {
         $require_value = $is_quoted;
 
         switch ($operator) {
diff --git a/src/applications/search/compiler/PhutilSearchStemmer.php b/src/applications/search/compiler/PhutilSearchStemmer.php
--- a/src/applications/search/compiler/PhutilSearchStemmer.php
+++ b/src/applications/search/compiler/PhutilSearchStemmer.php
@@ -16,7 +16,7 @@
     foreach ($tokens as $key => $token) {
       $token = trim($token, '._');
 
-      if (strlen($token) < 3) {
+      if (@strlen($token) < 3) {
         continue;
       }
 
@@ -46,7 +46,7 @@
     // If the token has internal punctuation, handle it literally. This
     // deals with things like domain names, Conduit API methods, and other
     // sorts of informal tokens.
-    if (preg_match('/[._]/', $normalized_token)) {
+    if (@preg_match('/[._]/', $normalized_token)) {
       return $normalized_token;
     }
 
@@ -64,7 +64,7 @@
     // If the stem is too short, it won't be a candidate for indexing. These
     // tokens are also likely to be acronyms (like "DNS") rather than real
     // English words.
-    if (strlen($stem) < 3) {
+    if (@strlen($stem) < 3) {
       return $normalized_token;
     }
 
diff --git a/src/applications/search/controller/PhabricatorApplicationSearchController.php b/src/applications/search/controller/PhabricatorApplicationSearchController.php
--- a/src/applications/search/controller/PhabricatorApplicationSearchController.php
+++ b/src/applications/search/controller/PhabricatorApplicationSearchController.php
@@ -115,7 +115,7 @@
     if ($this->queryKey == 'advanced') {
       $run_query = false;
       $query_key = $request->getStr('query');
-    } else if (!strlen($this->queryKey)) {
+    } else if (!@strlen($this->queryKey)) {
       $found_query_data = false;
 
       if ($request->isHTTPGet() || $request->isQuicksand()) {
@@ -775,7 +775,7 @@
     $force_nux) {
 
     // Don't render NUX if the user has clicked away from the default page.
-    if (strlen($this->getQueryKey())) {
+    if (@strlen($this->getQueryKey())) {
       return null;
     }
 
@@ -1022,7 +1022,7 @@
     $object_name = pht('%s %s', $object->getMonogram(), $object->getName());
 
     // Likewise, the context object can only be a dashboard.
-    if (strlen($context_phid)) {
+    if (@strlen($context_phid)) {
       $context = id(new PhabricatorDashboardQuery())
         ->setViewer($viewer)
         ->withPHIDs(array($context_phid))
diff --git a/src/applications/search/controller/PhabricatorSearchController.php b/src/applications/search/controller/PhabricatorSearchController.php
--- a/src/applications/search/controller/PhabricatorSearchController.php
+++ b/src/applications/search/controller/PhabricatorSearchController.php
@@ -13,7 +13,7 @@
     $viewer = $this->getViewer();
     $query = $request->getStr('query');
 
-    if ($request->getStr('jump') != 'no' && strlen($query)) {
+    if ($request->getStr('jump') != 'no' && @strlen($query)) {
       $jump_uri = id(new PhabricatorDatasourceEngine())
         ->setViewer($viewer)
         ->newJumpURI($query);
@@ -31,7 +31,7 @@
     if ($request->getBool('search:primary')) {
 
       // If there's no query, just take the user to advanced search.
-      if (!strlen($query)) {
+      if (!@strlen($query)) {
         $advanced_uri = '/search/query/advanced/';
         return id(new AphrontRedirectResponse())->setURI($advanced_uri);
       }
diff --git a/src/applications/search/controller/PhabricatorSearchEditController.php b/src/applications/search/controller/PhabricatorSearchEditController.php
--- a/src/applications/search/controller/PhabricatorSearchEditController.php
+++ b/src/applications/search/controller/PhabricatorSearchEditController.php
@@ -73,7 +73,7 @@
       }
 
       $named_query->setQueryName($request->getStr('name'));
-      if (!strlen($named_query->getQueryName())) {
+      if (!@strlen($named_query->getQueryName())) {
         $e_name = pht('Required');
         $errors[] = pht('You must name the query.');
       } else {
diff --git a/src/applications/search/controller/PhabricatorSearchRelationshipController.php b/src/applications/search/controller/PhabricatorSearchRelationshipController.php
--- a/src/applications/search/controller/PhabricatorSearchRelationshipController.php
+++ b/src/applications/search/controller/PhabricatorSearchRelationshipController.php
@@ -42,7 +42,7 @@
     $maximum = $relationship->getMaximumSelectionSize();
 
     if ($request->isFormPost()) {
-      $phids = explode(';', $request->getStr('phids'));
+      $phids = @explode(';', $request->getStr('phids'));
       $phids = array_filter($phids);
       $phids = array_values($phids);
 
diff --git a/src/applications/search/engine/PhabricatorApplicationSearchEngine.php b/src/applications/search/engine/PhabricatorApplicationSearchEngine.php
--- a/src/applications/search/engine/PhabricatorApplicationSearchEngine.php
+++ b/src/applications/search/engine/PhabricatorApplicationSearchEngine.php
@@ -179,7 +179,7 @@
 
     $order = $saved->getParameter('order');
     $builtin = $query->getBuiltinOrderAliasMap();
-    if (strlen($order) && isset($builtin[$order])) {
+    if (@strlen($order) && isset($builtin[$order])) {
       $query->setOrder($order);
     } else {
       // If the order is invalid or not available, we choose the first
@@ -872,7 +872,7 @@
   protected function readBoolFromRequest(
     AphrontRequest $request,
     $key) {
-    if (!strlen($request->getStr($key))) {
+    if (!@strlen($request->getStr($key))) {
       return null;
     }
     return $request->getBool($key);
@@ -895,7 +895,7 @@
    * @task dates
    */
   protected function parseDateTime($date_time) {
-    if (!strlen($date_time)) {
+    if (!@strlen($date_time)) {
       return null;
     }
 
@@ -916,7 +916,7 @@
 
     $start_str = $saved_query->getParameter($start_key);
     $start = null;
-    if (strlen($start_str)) {
+    if (@strlen($start_str)) {
       $start = $this->parseDateTime($start_str);
       if (!$start) {
         $this->addError(
@@ -929,7 +929,7 @@
 
     $end_str = $saved_query->getParameter($end_key);
     $end = null;
-    if (strlen($end_str)) {
+    if (@strlen($end_str)) {
       $end = $this->parseDateTime($end_str);
       if (!$end) {
         $this->addError(
@@ -1137,7 +1137,7 @@
     $viewer = $this->requireViewer();
 
     $query_key = $request->getValue('queryKey');
-    if (!strlen($query_key)) {
+    if (!@strlen($query_key)) {
       $saved_query = new PhabricatorSavedQuery();
     } else if ($this->isBuiltinQuery($query_key)) {
       $saved_query = $this->buildSavedQueryFromBuiltin($query_key);
diff --git a/src/applications/search/engine/PhabricatorProfileMenuEngine.php b/src/applications/search/engine/PhabricatorProfileMenuEngine.php
--- a/src/applications/search/engine/PhabricatorProfileMenuEngine.php
+++ b/src/applications/search/engine/PhabricatorProfileMenuEngine.php
@@ -135,7 +135,7 @@
     if ($is_view) {
       $selected_item = $this->selectViewItem($view_list, $item_id);
     } else {
-      if (!strlen($item_id)) {
+      if (!@strlen($item_id)) {
         $item_id = self::ITEM_MANAGE;
       }
       $selected_item = $this->selectEditItem($view_list, $item_id);
@@ -730,7 +730,7 @@
 
       $name = $item->getDisplayName();
       $type = $item->getMenuItemTypeName();
-      if (!strlen(trim($name))) {
+      if (!@strlen(trim($name))) {
         $name = pht('Untitled "%s" Item', $type);
       }
 
@@ -1308,7 +1308,7 @@
     // render the default view instead.
 
     $selected_view = null;
-    if (strlen($item_id)) {
+    if (@strlen($item_id)) {
       $item_views = $view_list->getViewsWithItemIdentifier($item_id);
       if ($item_views) {
         $selected_view = head($item_views);
diff --git a/src/applications/search/engine/PhabricatorProfileMenuItemView.php b/src/applications/search/engine/PhabricatorProfileMenuItemView.php
--- a/src/applications/search/engine/PhabricatorProfileMenuItemView.php
+++ b/src/applications/search/engine/PhabricatorProfileMenuItemView.php
@@ -140,7 +140,7 @@
       ->setName($this->getName());
 
     $uri = $this->getURI();
-    if (strlen($uri)) {
+    if (@strlen($uri)) {
       if ($this->getIsExternalLink()) {
         if (!PhabricatorEnv::isValidURIForLink($uri)) {
           $uri = '#';
@@ -176,7 +176,7 @@
     }
 
     $tooltip = $this->getTooltip();
-    if (strlen($tooltip)) {
+    if (@strlen($tooltip)) {
       $view->setTooltip($tooltip);
     }
 
diff --git a/src/applications/search/engine/PhabricatorSearchNgramEngine.php b/src/applications/search/engine/PhabricatorSearchNgramEngine.php
--- a/src/applications/search/engine/PhabricatorSearchNgramEngine.php
+++ b/src/applications/search/engine/PhabricatorSearchNgramEngine.php
@@ -43,7 +43,7 @@
 
       $token_l = array();
       for ($ii = 0; $ii < $length; $ii++) {
-        $token_l[$ii] = strlen($token_v[$ii]);
+        $token_l[$ii] = @strlen($token_v[$ii]);
       }
 
       $ngram_count = $length - 2;
@@ -51,7 +51,7 @@
       for ($ii = 0; $ii < $ngram_count; $ii++) {
         $ngram_l = $token_l[$ii] + $token_l[$ii + 1] + $token_l[$ii + 2];
 
-        $ngram = substr($token, $cursor, $ngram_l);
+        $ngram = @substr($token, $cursor, $ngram_l);
         $ngrams[$ngram] = $ngram;
 
         $cursor += $token_l[$ii];
diff --git a/src/applications/search/engineextension/PhabricatorFerretFulltextEngineExtension.php b/src/applications/search/engineextension/PhabricatorFerretFulltextEngineExtension.php
--- a/src/applications/search/engineextension/PhabricatorFerretFulltextEngineExtension.php
+++ b/src/applications/search/engineextension/PhabricatorFerretFulltextEngineExtension.php
@@ -83,7 +83,7 @@
 
     foreach ($virtual_fields as $field) {
       list($key, $raw_corpus) = $field;
-      if (!strlen($raw_corpus)) {
+      if (!@strlen($raw_corpus)) {
         continue;
       }
 
@@ -106,19 +106,19 @@
     foreach ($ferret_corpus_map as $key => $fields) {
       $raw_corpus = $fields['raw'];
       $raw_corpus = implode("\n", $raw_corpus);
-      if (strlen($raw_corpus)) {
+      if (@strlen($raw_corpus)) {
         $ngrams_source[] = $raw_corpus;
       }
 
       $normal_corpus = $fields['normal'];
       $normal_corpus = implode("\n", $normal_corpus);
-      if (strlen($normal_corpus)) {
+      if (@strlen($normal_corpus)) {
         $ngrams_source[] = $normal_corpus;
       }
 
       $term_corpus = $fields['term'];
       $term_corpus = implode("\n", $term_corpus);
-      if (strlen($term_corpus)) {
+      if (@strlen($term_corpus)) {
         $ngrams_source[] = $term_corpus;
       }
 
diff --git a/src/applications/search/engineextension/PhabricatorFerretSearchEngineExtension.php b/src/applications/search/engineextension/PhabricatorFerretSearchEngineExtension.php
--- a/src/applications/search/engineextension/PhabricatorFerretSearchEngineExtension.php
+++ b/src/applications/search/engineextension/PhabricatorFerretSearchEngineExtension.php
@@ -27,7 +27,7 @@
     PhabricatorSavedQuery $saved,
     array $map) {
 
-    if (!strlen($map['query'])) {
+    if (!@strlen($map['query'])) {
       return;
     }
 
diff --git a/src/applications/search/ferret/PhabricatorFerretEngine.php b/src/applications/search/ferret/PhabricatorFerretEngine.php
--- a/src/applications/search/ferret/PhabricatorFerretEngine.php
+++ b/src/applications/search/ferret/PhabricatorFerretEngine.php
@@ -99,7 +99,7 @@
     $term_corpus = preg_replace('/\s+/u', ' ', $term_corpus);
     $term_corpus = trim($term_corpus, ' ');
 
-    if (strlen($term_corpus)) {
+    if (@strlen($term_corpus)) {
       $term_corpus = ' '.$term_corpus.' ';
     }
 
diff --git a/src/applications/search/ferret/function/FerretSearchFunction.php b/src/applications/search/ferret/function/FerretSearchFunction.php
--- a/src/applications/search/ferret/function/FerretSearchFunction.php
+++ b/src/applications/search/ferret/function/FerretSearchFunction.php
@@ -12,7 +12,7 @@
   }
 
   final public static function validateFerretFunctionName($function_name) {
-    if (!preg_match('/^[a-zA-Z-]+\z/', $function_name)) {
+    if (!@preg_match('/^[a-zA-Z-]+\z/', $function_name)) {
       throw new Exception(
         pht(
           'Ferret search engine function name ("%s") is invalid. Function '.
@@ -23,7 +23,7 @@
   }
 
   final public static function validateFerretFunctionFieldKey($field_key) {
-    if (!preg_match('/^[a-z]{4}\z/', $field_key)) {
+    if (!@preg_match('/^[a-z]{4}\z/', $field_key)) {
       throw new Exception(
         pht(
           'Ferret search engine field key ("%s") is invalid. Field keys '.
diff --git a/src/applications/search/field/PhabricatorIDsSearchField.php b/src/applications/search/field/PhabricatorIDsSearchField.php
--- a/src/applications/search/field/PhabricatorIDsSearchField.php
+++ b/src/applications/search/field/PhabricatorIDsSearchField.php
@@ -12,7 +12,7 @@
   }
 
   protected function newControl() {
-    if (strlen($this->getValueForControl())) {
+    if (@strlen($this->getValueForControl())) {
       return new AphrontFormTextControl();
     } else {
       return null;
diff --git a/src/applications/search/field/PhabricatorPHIDsSearchField.php b/src/applications/search/field/PhabricatorPHIDsSearchField.php
--- a/src/applications/search/field/PhabricatorPHIDsSearchField.php
+++ b/src/applications/search/field/PhabricatorPHIDsSearchField.php
@@ -12,7 +12,7 @@
   }
 
   protected function newControl() {
-    if (strlen($this->getValueForControl())) {
+    if (@strlen($this->getValueForControl())) {
       return new AphrontFormTextControl();
     } else {
       return null;
diff --git a/src/applications/search/field/PhabricatorSearchDateField.php b/src/applications/search/field/PhabricatorSearchDateField.php
--- a/src/applications/search/field/PhabricatorSearchDateField.php
+++ b/src/applications/search/field/PhabricatorSearchDateField.php
@@ -17,7 +17,7 @@
   }
 
   protected function validateControlValue($value) {
-    if (!strlen($value)) {
+    if (!@strlen($value)) {
       return;
     }
 
@@ -32,7 +32,7 @@
   }
 
   protected function parseDateTime($value) {
-    if (!strlen($value)) {
+    if (!@strlen($value)) {
       return null;
     }
 
diff --git a/src/applications/search/field/PhabricatorSearchThreeStateField.php b/src/applications/search/field/PhabricatorSearchThreeStateField.php
--- a/src/applications/search/field/PhabricatorSearchThreeStateField.php
+++ b/src/applications/search/field/PhabricatorSearchThreeStateField.php
@@ -23,7 +23,7 @@
   }
 
   protected function getValueFromRequest(AphrontRequest $request, $key) {
-    if (!strlen($request->getStr($key))) {
+    if (!@strlen($request->getStr($key))) {
       return null;
     }
     return $request->getBool($key);
diff --git a/src/applications/search/fulltextstorage/PhabricatorElasticFulltextStorageEngine.php b/src/applications/search/fulltextstorage/PhabricatorElasticFulltextStorageEngine.php
--- a/src/applications/search/fulltextstorage/PhabricatorElasticFulltextStorageEngine.php
+++ b/src/applications/search/fulltextstorage/PhabricatorElasticFulltextStorageEngine.php
@@ -108,7 +108,7 @@
   private function buildSpec(PhabricatorSavedQuery $query) {
     $q = new PhabricatorElasticsearchQueryBuilder('bool');
     $query_string = $query->getParameter('query');
-    if (strlen($query_string)) {
+    if (@strlen($query_string)) {
       $fields = $this->getTypeConstants('PhabricatorSearchDocumentFieldType');
 
       // Build a simple_query_string query over all fields that must match all
diff --git a/src/applications/search/management/PhabricatorSearchManagementIndexWorkflow.php b/src/applications/search/management/PhabricatorSearchManagementIndexWorkflow.php
--- a/src/applications/search/management/PhabricatorSearchManagementIndexWorkflow.php
+++ b/src/applications/search/management/PhabricatorSearchManagementIndexWorkflow.php
@@ -370,7 +370,7 @@
         }
 
         // If the selector isn't a substring of the class name, continue.
-        if (strpos($normalized_class, $normalized_type) === false) {
+        if (@strpos($normalized_class, $normalized_type) === false) {
           continue;
         }
 
diff --git a/src/applications/search/management/PhabricatorSearchManagementQueryWorkflow.php b/src/applications/search/management/PhabricatorSearchManagementQueryWorkflow.php
--- a/src/applications/search/management/PhabricatorSearchManagementQueryWorkflow.php
+++ b/src/applications/search/management/PhabricatorSearchManagementQueryWorkflow.php
@@ -21,7 +21,7 @@
   public function execute(PhutilArgumentParser $args) {
     $viewer = $this->getViewer();
     $raw_query = $args->getArg('query');
-    if (!strlen($raw_query)) {
+    if (!@strlen($raw_query)) {
       throw new PhutilArgumentUsageException(
         pht('Specify a query with --query.'));
     }
diff --git a/src/applications/search/menuitem/PhabricatorApplicationProfileMenuItem.php b/src/applications/search/menuitem/PhabricatorApplicationProfileMenuItem.php
--- a/src/applications/search/menuitem/PhabricatorApplicationProfileMenuItem.php
+++ b/src/applications/search/menuitem/PhabricatorApplicationProfileMenuItem.php
@@ -27,7 +27,7 @@
     }
 
     $name = $this->getName($config);
-    if (strlen($name)) {
+    if (@strlen($name)) {
       return $name;
     }
 
@@ -90,7 +90,7 @@
 
     // Don't show tooltip if they've set a custom name
     $name = $config->getMenuItemProperty('name');
-    if (!strlen($name)) {
+    if (!@strlen($name)) {
       $item->setTooltip($app->getShortDescription());
     }
 
diff --git a/src/applications/search/menuitem/PhabricatorConpherenceProfileMenuItem.php b/src/applications/search/menuitem/PhabricatorConpherenceProfileMenuItem.php
--- a/src/applications/search/menuitem/PhabricatorConpherenceProfileMenuItem.php
+++ b/src/applications/search/menuitem/PhabricatorConpherenceProfileMenuItem.php
@@ -70,7 +70,7 @@
     }
 
     $name = $this->getName($config);
-    if (strlen($name)) {
+    if (@strlen($name)) {
       return $name;
     }
 
diff --git a/src/applications/search/menuitem/PhabricatorDashboardProfileMenuItem.php b/src/applications/search/menuitem/PhabricatorDashboardProfileMenuItem.php
--- a/src/applications/search/menuitem/PhabricatorDashboardProfileMenuItem.php
+++ b/src/applications/search/menuitem/PhabricatorDashboardProfileMenuItem.php
@@ -117,7 +117,7 @@
       return pht('Archived Dashboard');
     }
 
-    if (strlen($this->getName($config))) {
+    if (@strlen($this->getName($config))) {
       return $this->getName($config);
     } else {
       return $dashboard->getName();
diff --git a/src/applications/search/menuitem/PhabricatorEditEngineProfileMenuItem.php b/src/applications/search/menuitem/PhabricatorEditEngineProfileMenuItem.php
--- a/src/applications/search/menuitem/PhabricatorEditEngineProfileMenuItem.php
+++ b/src/applications/search/menuitem/PhabricatorEditEngineProfileMenuItem.php
@@ -71,7 +71,7 @@
     if (!$form) {
       return pht('(Restricted/Invalid Form)');
     }
-    if (strlen($this->getName($config))) {
+    if (@strlen($this->getName($config))) {
       return $this->getName($config);
     } else {
       return $form->getName();
diff --git a/src/applications/search/menuitem/PhabricatorManageProfileMenuItem.php b/src/applications/search/menuitem/PhabricatorManageProfileMenuItem.php
--- a/src/applications/search/menuitem/PhabricatorManageProfileMenuItem.php
+++ b/src/applications/search/menuitem/PhabricatorManageProfileMenuItem.php
@@ -31,7 +31,7 @@
     PhabricatorProfileMenuItemConfiguration $config) {
     $name = $config->getMenuItemProperty('name');
 
-    if (strlen($name)) {
+    if (@strlen($name)) {
       return $name;
     }
 
diff --git a/src/applications/search/menuitem/PhabricatorProfileMenuItem.php b/src/applications/search/menuitem/PhabricatorProfileMenuItem.php
--- a/src/applications/search/menuitem/PhabricatorProfileMenuItem.php
+++ b/src/applications/search/menuitem/PhabricatorProfileMenuItem.php
@@ -126,7 +126,7 @@
       $result = $xaction['new'];
     }
 
-    return !strlen($result);
+    return !@strlen($result);
   }
 
   final protected function newError($title, $message, $xaction = null) {
diff --git a/src/applications/search/menuitem/PhabricatorProjectProfileMenuItem.php b/src/applications/search/menuitem/PhabricatorProjectProfileMenuItem.php
--- a/src/applications/search/menuitem/PhabricatorProjectProfileMenuItem.php
+++ b/src/applications/search/menuitem/PhabricatorProjectProfileMenuItem.php
@@ -62,7 +62,7 @@
     if (!$project) {
       return pht('(Restricted/Invalid Project)');
     }
-    if (strlen($this->getName($config))) {
+    if (@strlen($this->getName($config))) {
       return $this->getName($config);
     } else {
       return $project->getName();
diff --git a/src/applications/search/storage/PhabricatorProfileMenuItemConfiguration.php b/src/applications/search/storage/PhabricatorProfileMenuItemConfiguration.php
--- a/src/applications/search/storage/PhabricatorProfileMenuItemConfiguration.php
+++ b/src/applications/search/storage/PhabricatorProfileMenuItemConfiguration.php
@@ -239,7 +239,7 @@
   }
 
   public function matchesIdentifier($identifier) {
-    if (!strlen($identifier)) {
+    if (!@strlen($identifier)) {
       return false;
     }
 
diff --git a/src/applications/search/view/PhabricatorSearchResultView.php b/src/applications/search/view/PhabricatorSearchResultView.php
--- a/src/applications/search/view/PhabricatorSearchResultView.php
+++ b/src/applications/search/view/PhabricatorSearchResultView.php
@@ -67,11 +67,11 @@
       return $str;
     }
 
-    if (!strlen($str)) {
+    if (!@strlen($str)) {
       return $str;
     }
 
-    if (strlen($str) > 2048) {
+    if (@strlen($str) > 2048) {
       return $str;
     }
 
@@ -121,7 +121,7 @@
 
         $all_matches[$match_offset] = max(
           $all_matches[$match_offset],
-          strlen($match_text));
+          @strlen($match_text));
       }
     }
 
@@ -134,7 +134,7 @@
     $highlight = 0;
     $offset = 0;
     foreach (phutil_utf8v_combined($str) as $character) {
-      $length = strlen($character);
+      $length = @strlen($character);
 
       if (isset($all_matches[$offset])) {
         $highlight = $all_matches[$offset];
diff --git a/src/applications/settings/panel/PhabricatorEmailAddressesSettingsPanel.php b/src/applications/settings/panel/PhabricatorEmailAddressesSettingsPanel.php
--- a/src/applications/settings/panel/PhabricatorEmailAddressesSettingsPanel.php
+++ b/src/applications/settings/panel/PhabricatorEmailAddressesSettingsPanel.php
@@ -184,7 +184,7 @@
         new PhabricatorSettingsAddEmailAction(),
         1);
 
-      if (!strlen($email)) {
+      if (!@strlen($email)) {
         $e_email = pht('Required');
         $errors[] = pht('Email is required.');
       } else if (!PhabricatorUserEmail::isValidAddress($email)) {
diff --git a/src/applications/settings/panel/PhabricatorExternalEditorSettingsPanel.php b/src/applications/settings/panel/PhabricatorExternalEditorSettingsPanel.php
--- a/src/applications/settings/panel/PhabricatorExternalEditorSettingsPanel.php
+++ b/src/applications/settings/panel/PhabricatorExternalEditorSettingsPanel.php
@@ -39,7 +39,7 @@
     $viewer = $this->getViewer();
     $pattern = $viewer->getUserSetting(PhabricatorEditorSetting::SETTINGKEY);
 
-    if (!strlen($pattern)) {
+    if (!@strlen($pattern)) {
       return null;
     }
 
diff --git a/src/applications/settings/panel/PhabricatorMultiFactorSettingsPanel.php b/src/applications/settings/panel/PhabricatorMultiFactorSettingsPanel.php
--- a/src/applications/settings/panel/PhabricatorMultiFactorSettingsPanel.php
+++ b/src/applications/settings/panel/PhabricatorMultiFactorSettingsPanel.php
@@ -257,7 +257,7 @@
     // example, with SMS).
     if (!$request->isFormPost() || !$request->getBool('mfa.start')) {
       $enroll = $selected_provider->getEnrollMessage();
-      if (!strlen($enroll)) {
+      if (!@strlen($enroll)) {
         $enroll = $selected_provider->getEnrollDescription($viewer);
       }
 
@@ -359,7 +359,7 @@
     $errors = array();
     if ($request->isFormPost()) {
       $name = $request->getStr('name');
-      if (!strlen($name)) {
+      if (!@strlen($name)) {
         $e_name = pht('Required');
         $errors[] = pht(
           'Authentication factors must have a name to identify them.');
diff --git a/src/applications/settings/panel/PhabricatorPasswordSettingsPanel.php b/src/applications/settings/panel/PhabricatorPasswordSettingsPanel.php
--- a/src/applications/settings/panel/PhabricatorPasswordSettingsPanel.php
+++ b/src/applications/settings/panel/PhabricatorPasswordSettingsPanel.php
@@ -85,7 +85,7 @@
         ->setPasswordType($account_type)
         ->setObject($user);
 
-      if (!strlen($envelope->openEnvelope())) {
+      if (!@strlen($envelope->openEnvelope())) {
         $errors[] = pht('You must enter your current password.');
         $e_old = pht('Required');
       } else if (!$engine->isValidPassword($envelope)) {
diff --git a/src/applications/settings/panel/PhabricatorSessionsSettingsPanel.php b/src/applications/settings/panel/PhabricatorSessionsSettingsPanel.php
--- a/src/applications/settings/panel/PhabricatorSessionsSettingsPanel.php
+++ b/src/applications/settings/panel/PhabricatorSessionsSettingsPanel.php
@@ -82,7 +82,7 @@
 
       $rows[] = array(
         $handles[$session->getUserPHID()]->renderLink(),
-        substr($session->getSessionKey(), 0, 6),
+        @substr($session->getSessionKey(), 0, 6),
         $session->getType(),
         ($hisec > 0)
           ? phutil_format_relative_time($hisec)
diff --git a/src/applications/settings/setting/PhabricatorEditorSetting.php b/src/applications/settings/setting/PhabricatorEditorSetting.php
--- a/src/applications/settings/setting/PhabricatorEditorSetting.php
+++ b/src/applications/settings/setting/PhabricatorEditorSetting.php
@@ -42,7 +42,7 @@
   }
 
   public function validateTransactionValue($value) {
-    if (!strlen($value)) {
+    if (!@strlen($value)) {
       return;
     }
 
diff --git a/src/applications/settings/setting/PhabricatorMonospacedFontSetting.php b/src/applications/settings/setting/PhabricatorMonospacedFontSetting.php
--- a/src/applications/settings/setting/PhabricatorMonospacedFontSetting.php
+++ b/src/applications/settings/setting/PhabricatorMonospacedFontSetting.php
@@ -25,7 +25,7 @@
   }
 
   public function validateTransactionValue($value) {
-    if (!strlen($value)) {
+    if (!@strlen($value)) {
       return;
     }
 
diff --git a/src/applications/settings/setting/PhabricatorOptionGroupSetting.php b/src/applications/settings/setting/PhabricatorOptionGroupSetting.php
--- a/src/applications/settings/setting/PhabricatorOptionGroupSetting.php
+++ b/src/applications/settings/setting/PhabricatorOptionGroupSetting.php
@@ -44,7 +44,7 @@
   }
 
   final public function validateTransactionValue($value) {
-    if (!strlen($value)) {
+    if (!@strlen($value)) {
       return;
     }
 
@@ -63,7 +63,7 @@
   }
 
   public function getTransactionNewValue($value) {
-    if (!strlen($value)) {
+    if (!@strlen($value)) {
       return null;
     }
 
diff --git a/src/applications/settings/setting/PhabricatorSelectSetting.php b/src/applications/settings/setting/PhabricatorSelectSetting.php
--- a/src/applications/settings/setting/PhabricatorSelectSetting.php
+++ b/src/applications/settings/setting/PhabricatorSelectSetting.php
@@ -36,7 +36,7 @@
       return;
     }
 
-    if (!strlen($value)) {
+    if (!@strlen($value)) {
       throw new Exception(
         pht(
           'Empty string is not a valid setting for "%s".',
@@ -47,7 +47,7 @@
   }
 
   final public function validateTransactionValue($value) {
-    if (!strlen($value)) {
+    if (!@strlen($value)) {
       return;
     }
 
@@ -66,7 +66,7 @@
   }
 
   public function getTransactionNewValue($value) {
-    if (!strlen($value)) {
+    if (!@strlen($value)) {
       return null;
     }
 
diff --git a/src/applications/settings/setting/PhabricatorSetting.php b/src/applications/settings/setting/PhabricatorSetting.php
--- a/src/applications/settings/setting/PhabricatorSetting.php
+++ b/src/applications/settings/setting/PhabricatorSetting.php
@@ -95,7 +95,7 @@
       ->setMetadataValue($setting_property, $setting_key);
 
     $instructions = $this->getControlInstructions();
-    if (strlen($instructions)) {
+    if (@strlen($instructions)) {
       $template->setControlInstructions($instructions);
     }
 
diff --git a/src/applications/settings/setting/PhabricatorStringSetting.php b/src/applications/settings/setting/PhabricatorStringSetting.php
--- a/src/applications/settings/setting/PhabricatorStringSetting.php
+++ b/src/applications/settings/setting/PhabricatorStringSetting.php
@@ -8,7 +8,7 @@
   }
 
   public function getTransactionNewValue($value) {
-    if (!strlen($value)) {
+    if (!@strlen($value)) {
       return null;
     }
 
diff --git a/src/applications/settings/setting/PhabricatorTranslationSetting.php b/src/applications/settings/setting/PhabricatorTranslationSetting.php
--- a/src/applications/settings/setting/PhabricatorTranslationSetting.php
+++ b/src/applications/settings/setting/PhabricatorTranslationSetting.php
@@ -69,7 +69,7 @@
 
       // If a translation is English, assume it can fall back to the default
       // strings and don't caveat its completeness.
-      $is_english = (substr($code, 0, 3) == 'en_');
+      $is_english = (@substr($code, 0, 3) == 'en_');
 
       // Arbitrarily pick some number of available strings to promote a
       // translation out of the "limited" group. The major goal is just to
diff --git a/src/applications/slowvote/controller/PhabricatorSlowvoteEditController.php b/src/applications/slowvote/controller/PhabricatorSlowvoteEditController.php
--- a/src/applications/slowvote/controller/PhabricatorSlowvoteEditController.php
+++ b/src/applications/slowvote/controller/PhabricatorSlowvoteEditController.php
@@ -60,7 +60,7 @@
         $poll->setMethod($request->getInt('method'));
       }
 
-      if (!strlen($v_question)) {
+      if (!@strlen($v_question)) {
         $e_question = pht('Required');
         $errors[] = pht('You must ask a poll question.');
       } else {
@@ -70,7 +70,7 @@
       if ($is_new) {
         // NOTE: Make sure common and useful response "0" is preserved.
         foreach ($responses as $key => $response) {
-          if (!strlen($response)) {
+          if (!@strlen($response)) {
             unset($responses[$key]);
           }
         }
diff --git a/src/applications/slowvote/editor/PhabricatorSlowvoteEditor.php b/src/applications/slowvote/editor/PhabricatorSlowvoteEditor.php
--- a/src/applications/slowvote/editor/PhabricatorSlowvoteEditor.php
+++ b/src/applications/slowvote/editor/PhabricatorSlowvoteEditor.php
@@ -58,7 +58,7 @@
     $body = parent::buildMailBody($object, $xactions);
     $description = $object->getDescription();
 
-    if (strlen($description)) {
+    if (@strlen($description)) {
       $body->addRemarkupSection(
         pht('SLOWVOTE DESCRIPTION'),
         $object->getDescription());
diff --git a/src/applications/slowvote/mail/PhabricatorSlowvoteMailReceiver.php b/src/applications/slowvote/mail/PhabricatorSlowvoteMailReceiver.php
--- a/src/applications/slowvote/mail/PhabricatorSlowvoteMailReceiver.php
+++ b/src/applications/slowvote/mail/PhabricatorSlowvoteMailReceiver.php
@@ -13,7 +13,7 @@
   }
 
   protected function loadObject($pattern, PhabricatorUser $viewer) {
-    $id = (int)substr($pattern, 1);
+    $id = (int)@substr($pattern, 1);
 
     return id(new PhabricatorSlowvoteQuery())
       ->setViewer($viewer)
diff --git a/src/applications/slowvote/phid/PhabricatorSlowvotePollPHIDType.php b/src/applications/slowvote/phid/PhabricatorSlowvotePollPHIDType.php
--- a/src/applications/slowvote/phid/PhabricatorSlowvotePollPHIDType.php
+++ b/src/applications/slowvote/phid/PhabricatorSlowvotePollPHIDType.php
@@ -39,7 +39,7 @@
   }
 
   public function canLoadNamedObject($name) {
-    return preg_match('/^V\d*[1-9]\d*$/i', $name);
+    return @preg_match('/^V\d*[1-9]\d*$/i', $name);
   }
 
   public function loadNamedObjects(
@@ -48,7 +48,7 @@
 
     $id_map = array();
     foreach ($names as $name) {
-      $id = (int)substr($name, 1);
+      $id = (int)@substr($name, 1);
       $id_map[$id][] = $name;
     }
 
diff --git a/src/applications/slowvote/query/PhabricatorSlowvoteSearchEngine.php b/src/applications/slowvote/query/PhabricatorSlowvoteSearchEngine.php
--- a/src/applications/slowvote/query/PhabricatorSlowvoteSearchEngine.php
+++ b/src/applications/slowvote/query/PhabricatorSlowvoteSearchEngine.php
@@ -150,7 +150,7 @@
       }
 
       $description = $poll->getDescription();
-      if (strlen($description)) {
+      if (@strlen($description)) {
         $item->addAttribute(id(new PhutilUTF8StringTruncator())
           ->setMaximumGlyphs(120)
           ->truncateString($poll->getDescription()));
diff --git a/src/applications/slowvote/view/SlowvoteEmbedView.php b/src/applications/slowvote/view/SlowvoteEmbedView.php
--- a/src/applications/slowvote/view/SlowvoteEmbedView.php
+++ b/src/applications/slowvote/view/SlowvoteEmbedView.php
@@ -60,7 +60,7 @@
       ->setHeader($link_to_slowvote);
 
     $description = $poll->getDescription();
-    if (strlen($description)) {
+    if (@strlen($description)) {
       $description = new PHUIRemarkupView($this->getUser(), $description);
       $description = phutil_tag(
         'div',
diff --git a/src/applications/spaces/controller/PhabricatorSpacesViewController.php b/src/applications/spaces/controller/PhabricatorSpacesViewController.php
--- a/src/applications/spaces/controller/PhabricatorSpacesViewController.php
+++ b/src/applications/spaces/controller/PhabricatorSpacesViewController.php
@@ -81,7 +81,7 @@
         : pht('No'));
 
     $description = $space->getDescription();
-    if (strlen($description)) {
+    if (@strlen($description)) {
       $description = new PHUIRemarkupView($viewer, $description);
       $list->addSectionHeader(
         pht('Description'),
diff --git a/src/applications/spaces/phid/PhabricatorSpacesNamespacePHIDType.php b/src/applications/spaces/phid/PhabricatorSpacesNamespacePHIDType.php
--- a/src/applications/spaces/phid/PhabricatorSpacesNamespacePHIDType.php
+++ b/src/applications/spaces/phid/PhabricatorSpacesNamespacePHIDType.php
@@ -49,7 +49,7 @@
   }
 
   public function canLoadNamedObject($name) {
-    return preg_match('/^S[1-9]\d*$/i', $name);
+    return @preg_match('/^S[1-9]\d*$/i', $name);
   }
 
   public function loadNamedObjects(
@@ -58,7 +58,7 @@
 
     $id_map = array();
     foreach ($names as $name) {
-      $id = (int)substr($name, 1);
+      $id = (int)@substr($name, 1);
       $id_map[$id][] = $name;
     }
 
diff --git a/src/applications/spaces/xaction/PhabricatorSpacesNamespaceNameTransaction.php b/src/applications/spaces/xaction/PhabricatorSpacesNamespaceNameTransaction.php
--- a/src/applications/spaces/xaction/PhabricatorSpacesNamespaceNameTransaction.php
+++ b/src/applications/spaces/xaction/PhabricatorSpacesNamespaceNameTransaction.php
@@ -15,7 +15,7 @@
 
   public function getTitle() {
     $old = $this->getOldValue();
-    if (!strlen($old)) {
+    if (!@strlen($old)) {
       return pht(
         '%s created this space.',
         $this->renderAuthor());
@@ -48,7 +48,7 @@
     $max_length = $object->getColumnMaximumByteLength('namespaceName');
     foreach ($xactions as $xaction) {
       $new_value = $xaction->getNewValue();
-      $new_length = strlen($new_value);
+      $new_length = @strlen($new_value);
       if ($new_length > $max_length) {
         $errors[] = $this->newInvalidError(
           pht('The name can be no longer than %s characters.',
diff --git a/src/applications/system/controller/PhabricatorSystemObjectController.php b/src/applications/system/controller/PhabricatorSystemObjectController.php
--- a/src/applications/system/controller/PhabricatorSystemObjectController.php
+++ b/src/applications/system/controller/PhabricatorSystemObjectController.php
@@ -24,7 +24,7 @@
     $handle = $handles[$phid];
 
     $object_uri = $handle->getURI();
-    if (!strlen($object_uri)) {
+    if (!@strlen($object_uri)) {
       return $this->newDialog()
         ->setTitle(pht('No Object URI'))
         ->appendParagraph(
diff --git a/src/applications/system/controller/PhabricatorSystemSelectViewAsController.php b/src/applications/system/controller/PhabricatorSystemSelectViewAsController.php
--- a/src/applications/system/controller/PhabricatorSystemSelectViewAsController.php
+++ b/src/applications/system/controller/PhabricatorSystemSelectViewAsController.php
@@ -38,7 +38,7 @@
 
       $label = $engine->getViewAsLabel($ref);
 
-      if (!strlen($label)) {
+      if (!@strlen($label)) {
         continue;
       }
 
diff --git a/src/applications/tokens/storage/PhabricatorToken.php b/src/applications/tokens/storage/PhabricatorToken.php
--- a/src/applications/tokens/storage/PhabricatorToken.php
+++ b/src/applications/tokens/storage/PhabricatorToken.php
@@ -34,7 +34,7 @@
     require_celerity_resource('sprite-tokens-css');
     require_celerity_resource('tokens-css');
 
-    $sprite = substr($this->getPHID(), 10);
+    $sprite = @substr($this->getPHID(), 10);
 
     return id(new PHUIIconView())
       ->setSpriteSheet(PHUIIconView::SPRITE_TOKENS)
diff --git a/src/applications/transactions/bulk/PhabricatorBulkEngine.php b/src/applications/transactions/bulk/PhabricatorBulkEngine.php
--- a/src/applications/transactions/bulk/PhabricatorBulkEngine.php
+++ b/src/applications/transactions/bulk/PhabricatorBulkEngine.php
@@ -153,7 +153,7 @@
       ->setViewer($viewer);
 
     $query_key = $request->getURIData('queryKey');
-    if (strlen($query_key)) {
+    if (@strlen($query_key)) {
       if ($search_engine->isBuiltinQuery($query_key)) {
         $saved = $search_engine->buildSavedQueryFromBuiltin($query_key);
       } else {
diff --git a/src/applications/transactions/bulk/management/PhabricatorBulkManagementExportWorkflow.php b/src/applications/transactions/bulk/management/PhabricatorBulkManagementExportWorkflow.php
--- a/src/applications/transactions/bulk/management/PhabricatorBulkManagementExportWorkflow.php
+++ b/src/applications/transactions/bulk/management/PhabricatorBulkManagementExportWorkflow.php
@@ -51,7 +51,7 @@
     list($engine, $queries) = $this->newQueries($args);
 
     $format_key = $args->getArg('format');
-    if (!strlen($format_key)) {
+    if (!@strlen($format_key)) {
       throw new PhutilArgumentUsageException(
         pht(
           'Specify an export format with "--format".'));
@@ -77,7 +77,7 @@
     $is_overwrite = $args->getArg('overwrite');
     $output_path = $args->getArg('output');
 
-    if (!strlen($output_path)) {
+    if (!@strlen($output_path)) {
       throw new PhutilArgumentUsageException(
         pht(
           'Use "--output <path>" to specify an output file, or "--output -" '.
@@ -164,7 +164,7 @@
       ->execute();
 
     $class = $args->getArg('class');
-    if (strlen($class)) {
+    if (@strlen($class)) {
 
       $class_list = array();
       foreach ($engine_classes as $class_name => $engine_object) {
@@ -182,7 +182,7 @@
       $matches = array();
       foreach ($engine_classes as $class_name => $engine_object) {
         if (stripos($class_name, $class) !== false) {
-          if (strtolower($class_name) == strtolower($class)) {
+          if (@strtolower($class_name) == @strtolower($class)) {
             $matches = array($class_name);
             break;
           } else {
diff --git a/src/applications/transactions/conduit/TransactionSearchConduitAPIMethod.php b/src/applications/transactions/conduit/TransactionSearchConduitAPIMethod.php
--- a/src/applications/transactions/conduit/TransactionSearchConduitAPIMethod.php
+++ b/src/applications/transactions/conduit/TransactionSearchConduitAPIMethod.php
@@ -263,7 +263,7 @@
       }
 
       $group_id = $xaction->getTransactionGroupID();
-      if (!strlen($group_id)) {
+      if (!@strlen($group_id)) {
         $group_id = null;
       } else {
         $group_id = (string)$group_id;
diff --git a/src/applications/transactions/controller/PhabricatorApplicationTransactionCommentEditController.php b/src/applications/transactions/controller/PhabricatorApplicationTransactionCommentEditController.php
--- a/src/applications/transactions/controller/PhabricatorApplicationTransactionCommentEditController.php
+++ b/src/applications/transactions/controller/PhabricatorApplicationTransactionCommentEditController.php
@@ -54,7 +54,7 @@
 
       $comment = $xaction->getApplicationTransactionCommentObject();
       $comment->setContent($text);
-      if (!strlen($text)) {
+      if (!@strlen($text)) {
         $comment->setIsDeleted(true);
       }
 
diff --git a/src/applications/transactions/controller/PhabricatorApplicationTransactionCommentQuoteController.php b/src/applications/transactions/controller/PhabricatorApplicationTransactionCommentQuoteController.php
--- a/src/applications/transactions/controller/PhabricatorApplicationTransactionCommentQuoteController.php
+++ b/src/applications/transactions/controller/PhabricatorApplicationTransactionCommentQuoteController.php
@@ -31,7 +31,7 @@
     $content = rtrim($content, "\r\n");
     $content = phutil_split_lines($content, true);
     foreach ($content as $key => $line) {
-      if (strlen($line) && ($line[0] != '>')) {
+      if (@strlen($line) && ($line[0] != '>')) {
         $content[$key] = '> '.$line;
       } else {
         $content[$key] = '>'.$line;
@@ -45,7 +45,7 @@
       ->executeOne();
 
     $ref = $request->getStr('ref');
-    if (strlen($ref)) {
+    if (@strlen($ref)) {
       $quote = pht('In %s, %s wrote:', $ref, '@'.$author->getName());
     } else {
       $quote = pht('%s wrote:', '@'.$author->getName());
diff --git a/src/applications/transactions/controller/PhabricatorEditEngineConfigurationLockController.php b/src/applications/transactions/controller/PhabricatorEditEngineConfigurationLockController.php
--- a/src/applications/transactions/controller/PhabricatorEditEngineConfigurationLockController.php
+++ b/src/applications/transactions/controller/PhabricatorEditEngineConfigurationLockController.php
@@ -89,7 +89,7 @@
       $key = $field->getKey();
 
       $label = $field->getLabel();
-      if (!strlen($label)) {
+      if (!@strlen($label)) {
         $label = $key;
       }
 
diff --git a/src/applications/transactions/editengine/PhabricatorEditEngine.php b/src/applications/transactions/editengine/PhabricatorEditEngine.php
--- a/src/applications/transactions/editengine/PhabricatorEditEngine.php
+++ b/src/applications/transactions/editengine/PhabricatorEditEngine.php
@@ -51,7 +51,7 @@
 
   final public function getEngineKey() {
     $key = $this->getPhobjectClassConstant('ENGINECONST', 64);
-    if (strpos($key, '/') !== false) {
+    if (@strpos($key, '/') !== false) {
       throw new Exception(
         pht(
           'EditEngine ("%s") contains an invalid key character "/".',
@@ -97,7 +97,7 @@
   }
 
   public static function splitFullKey($full_key) {
-    return explode('/', $full_key, 2);
+    return @explode('/', $full_key, 2);
   }
 
   public function getQuickCreateOrderVector() {
@@ -474,7 +474,7 @@
           ->setIsDefault(true)
           ->setIsEdit(true);
 
-        if (!strlen($first->getName())) {
+        if (!@strlen($first->getName())) {
           $first->setName($this->getObjectCreateShortText());
         }
     } else {
@@ -939,7 +939,7 @@
       }
     } else {
       $form_key = $request->getURIData('formKey');
-      if (strlen($form_key)) {
+      if (@strlen($form_key)) {
         $config = $this->loadEditEngineConfigurationWithIdentifier($form_key);
 
         if (!$config) {
@@ -969,14 +969,14 @@
     }
 
     $page_key = $request->getURIData('pageKey');
-    if (!strlen($page_key)) {
+    if (!@strlen($page_key)) {
       $pages = $this->getPages($object);
       if ($pages) {
         $page_key = head_key($pages);
       }
     }
 
-    if (strlen($page_key)) {
+    if (@strlen($page_key)) {
       $page = $this->selectPage($object, $page_key);
       if (!$page) {
         return new Aphront404Response();
@@ -1167,7 +1167,7 @@
       if ($this->getIsCreate()) {
         $template = $request->getStr('template');
 
-        if (strlen($template)) {
+        if (@strlen($template)) {
           $template_object = $this->newObjectFromIdentifier(
             $template,
             array(
@@ -1921,7 +1921,7 @@
           $viewer->getPHID(),
           $current_version);
 
-        $is_empty = (!strlen($comment_text) && !$actions);
+        $is_empty = (!@strlen($comment_text) && !$actions);
 
         $draft
           ->setProperty('comment', $comment_text)
@@ -2003,7 +2003,7 @@
       $xactions[] = $xaction;
     }
 
-    if (strlen($comment_text) || !$xactions) {
+    if (@strlen($comment_text) || !$xactions) {
       $xactions[] = id(clone $template)
         ->setTransactionType(PhabricatorTransactions::TYPE_COMMENT)
         ->attachComment(
diff --git a/src/applications/transactions/editengine/PhabricatorEditEngineAPIMethod.php b/src/applications/transactions/editengine/PhabricatorEditEngineAPIMethod.php
--- a/src/applications/transactions/editengine/PhabricatorEditEngineAPIMethod.php
+++ b/src/applications/transactions/editengine/PhabricatorEditEngineAPIMethod.php
@@ -96,7 +96,7 @@
       $section[] = $type->getConduitDescription();
 
       $type_documentation = $type->getConduitDocumentation();
-      if (strlen($type_documentation)) {
+      if (@strlen($type_documentation)) {
         $section[] = $type_documentation;
       }
 
diff --git a/src/applications/transactions/editengine/PhabricatorEditEngineSubtype.php b/src/applications/transactions/editengine/PhabricatorEditEngineSubtype.php
--- a/src/applications/transactions/editengine/PhabricatorEditEngineSubtype.php
+++ b/src/applications/transactions/editengine/PhabricatorEditEngineSubtype.php
@@ -89,7 +89,7 @@
   }
 
   public function hasTagView() {
-    return (bool)strlen($this->getTagText());
+    return (bool)@strlen($this->getTagText());
   }
 
   public function newTagView() {
@@ -117,7 +117,7 @@
   }
 
   public static function validateSubtypeKey($subtype) {
-    if (strlen($subtype) > 64) {
+    if (@strlen($subtype) > 64) {
       throw new Exception(
         pht(
           'Subtype "%s" is not valid: subtype keys must be no longer than '.
@@ -125,7 +125,7 @@
           $subtype));
     }
 
-    if (strlen($subtype) < 3) {
+    if (@strlen($subtype) < 3) {
       throw new Exception(
         pht(
           'Subtype "%s" is not valid: subtype keys must have a minimum '.
@@ -133,7 +133,7 @@
           $subtype));
     }
 
-    if (!preg_match('/^[a-z]+\z/', $subtype)) {
+    if (!@preg_match('/^[a-z]+\z/', $subtype)) {
       throw new Exception(
         pht(
           'Subtype "%s" is not valid: subtype keys may only contain '.
@@ -179,7 +179,7 @@
       $map[$key] = true;
 
       $name = $value['name'];
-      if (!strlen($name)) {
+      if (!@strlen($name)) {
         throw new Exception(
           pht(
             'Subtype configuration is invalid: subtype with key "%s" has '.
diff --git a/src/applications/transactions/editfield/PhabricatorEditField.php b/src/applications/transactions/editfield/PhabricatorEditField.php
--- a/src/applications/transactions/editfield/PhabricatorEditField.php
+++ b/src/applications/transactions/editfield/PhabricatorEditField.php
@@ -418,7 +418,7 @@
       }
 
       $instructions = $this->getControlInstructions();
-      if (strlen($instructions)) {
+      if (@strlen($instructions)) {
         $form->appendRemarkupInstructions($instructions);
       }
 
diff --git a/src/applications/transactions/editfield/PhabricatorTextEditField.php b/src/applications/transactions/editfield/PhabricatorTextEditField.php
--- a/src/applications/transactions/editfield/PhabricatorTextEditField.php
+++ b/src/applications/transactions/editfield/PhabricatorTextEditField.php
@@ -18,7 +18,7 @@
     $control = new AphrontFormTextControl();
 
     $placeholder = $this->getPlaceholder();
-    if (strlen($placeholder)) {
+    if (@strlen($placeholder)) {
       $control->setPlaceholder($placeholder);
     }
 
diff --git a/src/applications/transactions/editor/PhabricatorApplicationTransactionCommentEditor.php b/src/applications/transactions/editor/PhabricatorApplicationTransactionCommentEditor.php
--- a/src/applications/transactions/editor/PhabricatorApplicationTransactionCommentEditor.php
+++ b/src/applications/transactions/editor/PhabricatorApplicationTransactionCommentEditor.php
@@ -214,7 +214,7 @@
     }
 
     $cancel_uri = $this->getCancelURI();
-    if (!strlen($cancel_uri)) {
+    if (!@strlen($cancel_uri)) {
       throw new PhutilInvalidStateException('setCancelURI');
     }
 
diff --git a/src/applications/transactions/editor/PhabricatorApplicationTransactionEditor.php b/src/applications/transactions/editor/PhabricatorApplicationTransactionEditor.php
--- a/src/applications/transactions/editor/PhabricatorApplicationTransactionEditor.php
+++ b/src/applications/transactions/editor/PhabricatorApplicationTransactionEditor.php
@@ -511,7 +511,7 @@
         return true;
       case PhabricatorTransactions::TYPE_SPACE:
         $space_phid = $xaction->getNewValue();
-        if (!strlen($space_phid)) {
+        if (!@strlen($space_phid)) {
           // If an install has no Spaces or the Spaces controls are not visible
           // to the viewer, we might end up with the empty string here instead
           // of a strict `null`, because some controller just used `getStr()`
@@ -2909,11 +2909,11 @@
    * @return bool True if the field will be an empty text field after edits.
    */
   protected function validateIsEmptyTextField($field_value, array $xactions) {
-    if (strlen($field_value) && empty($xactions)) {
+    if (@strlen($field_value) && empty($xactions)) {
       return false;
     }
 
-    if ($xactions && strlen(last($xactions)->getNewValue())) {
+    if ($xactions && @strlen(last($xactions)->getNewValue())) {
       return false;
     }
 
diff --git a/src/applications/transactions/storage/PhabricatorApplicationTransaction.php b/src/applications/transactions/storage/PhabricatorApplicationTransaction.php
--- a/src/applications/transactions/storage/PhabricatorApplicationTransaction.php
+++ b/src/applications/transactions/storage/PhabricatorApplicationTransaction.php
@@ -507,9 +507,9 @@
         $old = $this->getOldValue();
         $new = $this->getNewValue();
         if ($new) {
-          $icon = substr($new, 10);
+          $icon = @substr($new, 10);
         } else {
-          $icon = substr($old, 10);
+          $icon = @substr($old, 10);
         }
         return array($icon, !$this->getNewValue());
     }
@@ -602,7 +602,7 @@
           }
 
           if (!is_array($old)) {
-            if (!strlen($old)) {
+            if (!@strlen($old)) {
               return true;
             }
 
@@ -863,7 +863,7 @@
     }
 
     $comment = $this->getComment();
-    if ($comment && strlen($comment->getContent())) {
+    if ($comment && @strlen($comment->getContent())) {
       return $comment->getContent();
     }
 
@@ -1328,7 +1328,7 @@
     switch ($this->getTransactionType()) {
       case PhabricatorTransactions::TYPE_COMMENT:
         $text = $this->getComment()->getContent();
-        if (strlen($text)) {
+        if (@strlen($text)) {
           $fields[] = 'comment/'.$this->getID();
         }
         break;
@@ -1362,7 +1362,7 @@
     switch ($this->getTransactionType()) {
       case PhabricatorTransactions::TYPE_COMMENT:
         $text = $this->getComment()->getContent();
-        if (strlen($text)) {
+        if (@strlen($text)) {
           $body = $story->getMarkupFieldOutput('comment/'.$this->getID());
         }
         break;
diff --git a/src/applications/transactions/storage/PhabricatorApplicationTransactionComment.php b/src/applications/transactions/storage/PhabricatorApplicationTransactionComment.php
--- a/src/applications/transactions/storage/PhabricatorApplicationTransactionComment.php
+++ b/src/applications/transactions/storage/PhabricatorApplicationTransactionComment.php
@@ -112,7 +112,7 @@
 
     // The comment is empty if there's no content, or if the content only has
     // whitespace.
-    if (!strlen(trim($content))) {
+    if (!@strlen(trim($content))) {
       return true;
     }
 
diff --git a/src/applications/transactions/storage/PhabricatorEditEngineConfiguration.php b/src/applications/transactions/storage/PhabricatorEditEngineConfiguration.php
--- a/src/applications/transactions/storage/PhabricatorEditEngineConfiguration.php
+++ b/src/applications/transactions/storage/PhabricatorEditEngineConfiguration.php
@@ -113,7 +113,7 @@
   }
 
   public function setBuiltinKey($key) {
-    if (strpos($key, '/') !== false) {
+    if (@strpos($key, '/') !== false) {
       throw new Exception(
         pht('EditEngine BuiltinKey contains an invalid key character "/".'));
     }
@@ -185,7 +185,7 @@
     $fields = $this->reorderFields($fields);
 
     $preamble = $this->getPreamble();
-    if (strlen($preamble)) {
+    if (@strlen($preamble)) {
       $fields = array(
         'config.preamble' => id(new PhabricatorInstructionsEditField())
           ->setKey('config.preamble')
@@ -240,7 +240,7 @@
 
   public function getDisplayName() {
     $name = $this->getName();
-    if (strlen($name)) {
+    if (@strlen($name)) {
       return $name;
     }
 
diff --git a/src/applications/transactions/storage/PhabricatorModularTransactionType.php b/src/applications/transactions/storage/PhabricatorModularTransactionType.php
--- a/src/applications/transactions/storage/PhabricatorModularTransactionType.php
+++ b/src/applications/transactions/storage/PhabricatorModularTransactionType.php
@@ -339,7 +339,7 @@
       $value = $xaction->getNewValue();
     }
 
-    return !strlen($value);
+    return !@strlen($value);
   }
 
   /**
diff --git a/src/applications/transactions/view/PhabricatorApplicationEditHTTPParameterHelpView.php b/src/applications/transactions/view/PhabricatorApplicationEditHTTPParameterHelpView.php
--- a/src/applications/transactions/view/PhabricatorApplicationEditHTTPParameterHelpView.php
+++ b/src/applications/transactions/view/PhabricatorApplicationEditHTTPParameterHelpView.php
@@ -255,7 +255,7 @@
       $options = $field->getOptions();
       $label = $field->getLabel();
       foreach ($options as $option_key => $option_value) {
-        if (strlen($option_key)) {
+        if (@strlen($option_key)) {
           $option_display = $option_key;
         } else {
           $option_display = phutil_tag('em', array(), pht('<empty>'));
diff --git a/src/applications/transactions/view/PhabricatorApplicationTransactionCommentView.php b/src/applications/transactions/view/PhabricatorApplicationTransactionCommentView.php
--- a/src/applications/transactions/view/PhabricatorApplicationTransactionCommentView.php
+++ b/src/applications/transactions/view/PhabricatorApplicationTransactionCommentView.php
@@ -568,7 +568,7 @@
     }
 
     foreach ($groups as $group_key => $group_items) {
-      if (strlen($group_key)) {
+      if (@strlen($group_key)) {
         $group_label = idx($group_labels, $group_key, $group_key);
         $options[$group_label] = ipull($group_items, 'label');
       } else {
diff --git a/src/applications/transactions/xaction/PhabricatorEditEngineNameTransaction.php b/src/applications/transactions/xaction/PhabricatorEditEngineNameTransaction.php
--- a/src/applications/transactions/xaction/PhabricatorEditEngineNameTransaction.php
+++ b/src/applications/transactions/xaction/PhabricatorEditEngineNameTransaction.php
@@ -14,7 +14,7 @@
   }
 
   public function getTitle() {
-    if (strlen($this->getOldValue())) {
+    if (@strlen($this->getOldValue())) {
       return pht(
         '%s renamed this form from %s to %s.',
         $this->renderAuthor(),
@@ -33,7 +33,7 @@
 
     foreach ($xactions as $xaction) {
       $new = $xaction->getNewValue();
-      if (!strlen($new)) {
+      if (!@strlen($new)) {
         $errors[] = $this->newRequiredError(
           pht('Form name is required.'),
           $xaction);
diff --git a/src/applications/typeahead/controller/PhabricatorTypeaheadModularDatasourceController.php b/src/applications/typeahead/controller/PhabricatorTypeaheadModularDatasourceController.php
--- a/src/applications/typeahead/controller/PhabricatorTypeaheadModularDatasourceController.php
+++ b/src/applications/typeahead/controller/PhabricatorTypeaheadModularDatasourceController.php
@@ -39,7 +39,7 @@
       $parameters = array();
 
       $raw_parameters = $request->getStr('parameters');
-      if (strlen($raw_parameters)) {
+      if (@strlen($raw_parameters)) {
         try {
           $parameters = phutil_json_decode($raw_parameters);
         } catch (PhutilJSONParserException $ex) {
diff --git a/src/applications/typeahead/datasource/PhabricatorTypeaheadCompositeDatasource.php b/src/applications/typeahead/datasource/PhabricatorTypeaheadCompositeDatasource.php
--- a/src/applications/typeahead/datasource/PhabricatorTypeaheadCompositeDatasource.php
+++ b/src/applications/typeahead/datasource/PhabricatorTypeaheadCompositeDatasource.php
@@ -28,7 +28,7 @@
 
     // We only need to do a prefix phase query if there's an actual query
     // string. If the user didn't type anything, nothing can possibly match it.
-    if (strlen($this->getRawQuery())) {
+    if (@strlen($this->getRawQuery())) {
       $phases[] = self::PHASE_PREFIX;
     }
 
@@ -66,7 +66,7 @@
   protected function loadResultsForPhase($phase, $limit) {
     if ($phase == self::PHASE_PREFIX) {
       $this->prefixString = $this->getPrefixQuery();
-      $this->prefixLength = strlen($this->prefixString);
+      $this->prefixLength = @strlen($this->prefixString);
     }
 
     // If the input query is a function like `members(platy`, and we can
diff --git a/src/applications/typeahead/datasource/PhabricatorTypeaheadDatasource.php b/src/applications/typeahead/datasource/PhabricatorTypeaheadDatasource.php
--- a/src/applications/typeahead/datasource/PhabricatorTypeaheadDatasource.php
+++ b/src/applications/typeahead/datasource/PhabricatorTypeaheadDatasource.php
@@ -149,7 +149,7 @@
   public static function tokenizeString($string) {
     $string = phutil_utf8_strtolower($string);
     $string = trim($string);
-    if (!strlen($string)) {
+    if (!@strlen($string)) {
       return array();
     }
 
@@ -161,7 +161,7 @@
     // Make sure we don't return the empty token, as this will boil down to a
     // JOIN against every token.
     foreach ($tokens as $key => $value) {
-      if (!strlen($value)) {
+      if (!@strlen($value)) {
         unset($tokens[$key]);
       }
     }
@@ -223,7 +223,7 @@
 
     $map = array();
     foreach ($tokens as $token) {
-      $map[$token] = strlen($token);
+      $map[$token] = @strlen($token);
     }
 
     foreach ($results as $key => $result) {
@@ -464,7 +464,7 @@
     // We're looking for a "(" so that a string like "members(q" is identified
     // and parsed as a function call. This allows us to start generating
     // results immediately, before the user fully types out "members(quack)".
-    return (strpos($token, '(') !== false);
+    return (@strpos($token, '(') !== false);
   }
 
 
@@ -475,9 +475,9 @@
     $matches = null;
 
     if ($allow_partial) {
-      $ok = preg_match('/^([^(]+)\((.*?)\)?\z/', $token, $matches);
+      $ok = @preg_match('/^([^(]+)\((.*?)\)?\z/', $token, $matches);
     } else {
-      $ok = preg_match('/^([^(]+)\((.*)\)\z/', $token, $matches);
+      $ok = @preg_match('/^([^(]+)\((.*)\)\z/', $token, $matches);
     }
 
     if (!$ok) {
@@ -510,7 +510,7 @@
 
     $argv = $matches[2];
     $argv = trim($argv);
-    if (!strlen($argv)) {
+    if (!@strlen($argv)) {
       $argv = array();
     } else {
       $argv = preg_split('/,/', $matches[2]);
diff --git a/src/applications/typeahead/datasource/__tests__/PhabricatorTypeaheadTestNumbersDatasource.php b/src/applications/typeahead/datasource/__tests__/PhabricatorTypeaheadTestNumbersDatasource.php
--- a/src/applications/typeahead/datasource/__tests__/PhabricatorTypeaheadTestNumbersDatasource.php
+++ b/src/applications/typeahead/datasource/__tests__/PhabricatorTypeaheadTestNumbersDatasource.php
@@ -36,7 +36,7 @@
 
     foreach ($argv_list as $argv) {
       foreach ($argv as $k => $arg) {
-        if (!is_scalar($arg) || !preg_match('/^\d+\z/', $arg)) {
+        if (!is_scalar($arg) || !@preg_match('/^\d+\z/', $arg)) {
           throw new PhabricatorTypeaheadInvalidTokenException(
             pht(
               'All arguments to "%s(...)" must be integers, found '.
diff --git a/src/applications/typeahead/engineextension/PhabricatorMonogramDatasourceEngineExtension.php b/src/applications/typeahead/engineextension/PhabricatorMonogramDatasourceEngineExtension.php
--- a/src/applications/typeahead/engineextension/PhabricatorMonogramDatasourceEngineExtension.php
+++ b/src/applications/typeahead/engineextension/PhabricatorMonogramDatasourceEngineExtension.php
@@ -16,17 +16,17 @@
     // today and don't feel worth adding separate extensions for.
 
     // Send "f" to Feed.
-    if (preg_match('/^f\z/i', $query)) {
+    if (@preg_match('/^f\z/i', $query)) {
       return '/feed/';
     }
 
     // Send "d" to Differential.
-    if (preg_match('/^d\z/i', $query)) {
+    if (@preg_match('/^d\z/i', $query)) {
       return '/differential/';
     }
 
     // Send "t" to Maniphest.
-    if (preg_match('/^t\z/i', $query)) {
+    if (@preg_match('/^t\z/i', $query)) {
       return '/maniphest/';
     }
 
diff --git a/src/applications/uiexample/examples/PhabricatorUIExample.php b/src/applications/uiexample/examples/PhabricatorUIExample.php
--- a/src/applications/uiexample/examples/PhabricatorUIExample.php
+++ b/src/applications/uiexample/examples/PhabricatorUIExample.php
@@ -35,7 +35,7 @@
     } else {
       $handle->setFullName(
         sprintf('%s%d: %s',
-          substr($type, 0, 1),
+          @substr($type, 0, 1),
           $id,
           $name));
     }
diff --git a/src/applications/xhprof/storage/PhabricatorXHProfSample.php b/src/applications/xhprof/storage/PhabricatorXHProfSample.php
--- a/src/applications/xhprof/storage/PhabricatorXHProfSample.php
+++ b/src/applications/xhprof/storage/PhabricatorXHProfSample.php
@@ -43,7 +43,7 @@
 
   public function getDisplayName() {
     $request_path = $this->getRequestPath();
-    if (strlen($request_path)) {
+    if (@strlen($request_path)) {
       return $request_path;
     }
 
diff --git a/src/applications/xhprof/view/PhabricatorXHProfProfileSymbolView.php b/src/applications/xhprof/view/PhabricatorXHProfProfileSymbolView.php
--- a/src/applications/xhprof/view/PhabricatorXHProfProfileSymbolView.php
+++ b/src/applications/xhprof/view/PhabricatorXHProfProfileSymbolView.php
@@ -34,8 +34,8 @@
     $children = array();
     $parents = array();
     foreach ($this->profileData as $key => $counters) {
-      if (strpos($key, '==>') !== false) {
-        list($parent, $child) = explode('==>', $key, 2);
+      if (@strpos($key, '==>') !== false) {
+        list($parent, $child) = @explode('==>', $key, 2);
       } else {
         continue;
       }
diff --git a/src/applications/xhprof/view/PhabricatorXHProfProfileTopLevelView.php b/src/applications/xhprof/view/PhabricatorXHProfProfileTopLevelView.php
--- a/src/applications/xhprof/view/PhabricatorXHProfProfileTopLevelView.php
+++ b/src/applications/xhprof/view/PhabricatorXHProfProfileTopLevelView.php
@@ -35,7 +35,7 @@
 
     $aggregated = array();
     foreach ($flat as $call => $counters) {
-      $parts = explode('@', $call, 2);
+      $parts = @explode('@', $call, 2);
       $agg_call = reset($parts);
       if (empty($aggregated[$agg_call])) {
         $aggregated[$agg_call] = $counters;
diff --git a/src/docs/flavor/php_pitfalls.diviner b/src/docs/flavor/php_pitfalls.diviner
--- a/src/docs/flavor/php_pitfalls.diviner
+++ b/src/docs/flavor/php_pitfalls.diviner
@@ -60,7 +60,7 @@
 
 This is wrong because it prevents users from making the comment "0". //THIS
 COMMENT IS TOTALLY AWESOME AND I MAKE IT ALL THE TIME SO YOU HAD BETTER NOT
-BREAK IT!!!// A better test is probably `strlen()`.
+BREAK IT!!!// A better test is probably `@strlen()`.
 
 In addition to truth tests with `if`, PHP has two special truthiness operators
 which look like functions but aren't: `empty()` and `isset()`. These operators
diff --git a/src/infrastructure/cache/PhutilDirectoryKeyValueCache.php b/src/infrastructure/cache/PhutilDirectoryKeyValueCache.php
--- a/src/infrastructure/cache/PhutilDirectoryKeyValueCache.php
+++ b/src/infrastructure/cache/PhutilDirectoryKeyValueCache.php
@@ -196,7 +196,7 @@
     foreach ($keys as $key) {
       // NOTE: Use of "." is reserved for ".lock", "key.new" and "key.cache".
       // Use of "_" is reserved for converting ":".
-      if (!preg_match('@^[a-zA-Z0-9/:-]+$@', $key)) {
+      if (!@preg_match('@^[a-zA-Z0-9/:-]+$@', $key)) {
         throw new Exception(
           pht(
             "Invalid key '%s': directory caches may only contain letters, ".
diff --git a/src/infrastructure/cache/PhutilKeyValueCacheNamespace.php b/src/infrastructure/cache/PhutilKeyValueCacheNamespace.php
--- a/src/infrastructure/cache/PhutilKeyValueCacheNamespace.php
+++ b/src/infrastructure/cache/PhutilKeyValueCacheNamespace.php
@@ -5,7 +5,7 @@
   private $namespace;
 
   public function setNamespace($namespace) {
-    if (strpos($namespace, ':') !== false) {
+    if (@strpos($namespace, ':') !== false) {
       throw new Exception(pht("Namespace can't contain colons."));
     }
 
@@ -56,7 +56,7 @@
 
     $unprefixed_keys = array();
     foreach ($keys as $key) {
-      $unprefixed_keys[] = substr($key, strlen($this->namespace));
+      $unprefixed_keys[] = @substr($key, @strlen($this->namespace));
     }
 
     return $unprefixed_keys;
diff --git a/src/infrastructure/cluster/PhabricatorDatabaseRef.php b/src/infrastructure/cluster/PhabricatorDatabaseRef.php
--- a/src/infrastructure/cluster/PhabricatorDatabaseRef.php
+++ b/src/infrastructure/cluster/PhabricatorDatabaseRef.php
@@ -229,7 +229,7 @@
     $host = $this->getHost();
 
     $port = $this->getPort();
-    if (strlen($port)) {
+    if (@strlen($port)) {
       return "{$host}:{$port}";
     }
 
@@ -392,7 +392,7 @@
 
         if ($is_replica) {
           $latency = idx($replica_status, 'Seconds_Behind_Master');
-          if (!strlen($latency)) {
+          if (!@strlen($latency)) {
             $ref->setReplicaStatus(self::REPLICATION_NOT_REPLICATING);
           } else {
             $latency = (int)$latency;
diff --git a/src/infrastructure/contentsource/PhabricatorUnknownContentSource.php b/src/infrastructure/contentsource/PhabricatorUnknownContentSource.php
--- a/src/infrastructure/contentsource/PhabricatorUnknownContentSource.php
+++ b/src/infrastructure/contentsource/PhabricatorUnknownContentSource.php
@@ -7,7 +7,7 @@
 
   public function getSourceName() {
     $source = $this->getSource();
-    if (strlen($source)) {
+    if (@strlen($source)) {
       return pht('Unknown ("%s")', $source);
     } else {
       return pht('Unknown');
diff --git a/src/infrastructure/customfield/datasource/PhabricatorStandardSelectCustomFieldDatasource.php b/src/infrastructure/customfield/datasource/PhabricatorStandardSelectCustomFieldDatasource.php
--- a/src/infrastructure/customfield/datasource/PhabricatorStandardSelectCustomFieldDatasource.php
+++ b/src/infrastructure/customfield/datasource/PhabricatorStandardSelectCustomFieldDatasource.php
@@ -37,7 +37,7 @@
     }
 
     $role = $this->getParameter('role');
-    if (!strlen($role)) {
+    if (!@strlen($role)) {
       throw new Exception(pht('No custom field role specified.'));
     }
 
@@ -45,7 +45,7 @@
     $field_list = PhabricatorCustomField::getObjectFields($object, $role);
 
     $field_key = $this->getParameter('key');
-    if (!strlen($field_key)) {
+    if (!@strlen($field_key)) {
       throw new Exception(pht('No custom field key specified.'));
     }
 
diff --git a/src/infrastructure/customfield/field/PhabricatorCustomField.php b/src/infrastructure/customfield/field/PhabricatorCustomField.php
--- a/src/infrastructure/customfield/field/PhabricatorCustomField.php
+++ b/src/infrastructure/customfield/field/PhabricatorCustomField.php
@@ -1669,7 +1669,7 @@
     $map = array();
     foreach ($fields as $field) {
       $modern_key = $field->getModernFieldKey();
-      if (!strlen($modern_key)) {
+      if (!@strlen($modern_key)) {
         continue;
       }
 
diff --git a/src/infrastructure/customfield/field/PhabricatorCustomFieldList.php b/src/infrastructure/customfield/field/PhabricatorCustomFieldList.php
--- a/src/infrastructure/customfield/field/PhabricatorCustomFieldList.php
+++ b/src/infrastructure/customfield/field/PhabricatorCustomFieldList.php
@@ -89,7 +89,7 @@
       $field_handles = array_select_keys($handles, $phids[$field_key]);
 
       $instructions = $field->getInstructionsForEdit();
-      if (strlen($instructions)) {
+      if (@strlen($instructions)) {
         $form->appendRemarkupInstructions($instructions);
       }
 
diff --git a/src/infrastructure/customfield/herald/PhabricatorCustomFieldHeraldField.php b/src/infrastructure/customfield/herald/PhabricatorCustomFieldHeraldField.php
--- a/src/infrastructure/customfield/herald/PhabricatorCustomFieldHeraldField.php
+++ b/src/infrastructure/customfield/herald/PhabricatorCustomFieldHeraldField.php
@@ -42,7 +42,7 @@
       // arrange a collision) but preserves backward compatibility.
 
       $full_key = $prefix.$key;
-      if (strlen($full_key) > $limit) {
+      if (@strlen($full_key) > $limit) {
         $full_key = PhabricatorHash::digestToLength($full_key, $limit);
       }
 
diff --git a/src/infrastructure/customfield/standard/PhabricatorStandardCustomField.php b/src/infrastructure/customfield/standard/PhabricatorStandardCustomField.php
--- a/src/infrastructure/customfield/standard/PhabricatorStandardCustomField.php
+++ b/src/infrastructure/customfield/standard/PhabricatorStandardCustomField.php
@@ -268,7 +268,7 @@
 
   public function readValueFromRequest(AphrontRequest $request) {
     $value = $request->getStr($this->getFieldKey());
-    if (!strlen($value)) {
+    if (!@strlen($value)) {
       $value = null;
     }
     $this->setFieldValue($value);
@@ -301,7 +301,7 @@
   }
 
   public function renderPropertyViewValue(array $handles) {
-    if (!strlen($this->getFieldValue())) {
+    if (!@strlen($this->getFieldValue())) {
       return null;
     }
     return $this->getFieldValue();
@@ -389,7 +389,7 @@
     if (is_array($value)) {
       return empty($value);
     }
-    return !strlen($value);
+    return !@strlen($value);
   }
 
   public function getApplicationTransactionTitle(
@@ -472,12 +472,12 @@
 
     // If the caller or configuration didn't specify a valid field key,
     // generate one automatically from the field index.
-    if (!is_string($field_key) || (strlen($field_key) != 4)) {
-      $field_key = '!'.substr($this->getFieldIndex(), 0, 3);
+    if (!is_string($field_key) || (@strlen($field_key) != 4)) {
+      $field_key = '!'.@substr($this->getFieldIndex(), 0, 3);
     }
 
     $field_value = $this->getFieldValue();
-    if (strlen($field_value)) {
+    if (@strlen($field_value)) {
       $document->addField($field_key, $field_value);
     }
   }
diff --git a/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldBool.php b/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldBool.php
--- a/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldBool.php
+++ b/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldBool.php
@@ -11,7 +11,7 @@
     $indexes = array();
 
     $value = $this->getFieldValue();
-    if (strlen($value)) {
+    if (@strlen($value)) {
       $indexes[] = $this->newNumericIndex((int)$value);
     }
 
@@ -36,7 +36,7 @@
   }
 
   public function setValueFromStorage($value) {
-    if (strlen($value)) {
+    if (@strlen($value)) {
       $value = (bool)$value;
     } else {
       $value = null;
diff --git a/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldCredential.php b/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldCredential.php
--- a/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldCredential.php
+++ b/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldCredential.php
@@ -11,7 +11,7 @@
     $indexes = array();
 
     $value = $this->getFieldValue();
-    if (strlen($value)) {
+    if (@strlen($value)) {
       $indexes[] = $this->newStringIndex($value);
     }
 
diff --git a/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldDate.php b/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldDate.php
--- a/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldDate.php
+++ b/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldDate.php
@@ -11,7 +11,7 @@
     $indexes = array();
 
     $value = $this->getFieldValue();
-    if (strlen($value)) {
+    if (@strlen($value)) {
       $indexes[] = $this->newNumericIndex((int)$value);
     }
 
@@ -24,7 +24,7 @@
 
   public function getValueForStorage() {
     $value = $this->getFieldValue();
-    if (strlen($value)) {
+    if (@strlen($value)) {
       return (int)$value;
     } else {
       return null;
@@ -32,7 +32,7 @@
   }
 
   public function setValueFromStorage($value) {
-    if (strlen($value)) {
+    if (@strlen($value)) {
       $value = (int)$value;
     } else {
       $value = null;
@@ -109,14 +109,14 @@
     }
 
     $min_str = idx($value, 'min', '');
-    if (strlen($min_str)) {
+    if (@strlen($min_str)) {
       $min = PhabricatorTime::parseLocalTime($min_str, $viewer);
     } else {
       $min = null;
     }
 
     $max_str = idx($value, 'max', '');
-    if (strlen($max_str)) {
+    if (@strlen($max_str)) {
       $max = PhabricatorTime::parseLocalTime($max_str, $viewer);
     } else {
       $max = null;
diff --git a/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldInt.php b/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldInt.php
--- a/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldInt.php
+++ b/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldInt.php
@@ -11,7 +11,7 @@
     $indexes = array();
 
     $value = $this->getFieldValue();
-    if (strlen($value)) {
+    if (@strlen($value)) {
       $indexes[] = $this->newNumericIndex((int)$value);
     }
 
@@ -24,7 +24,7 @@
 
   public function getValueForStorage() {
     $value = $this->getFieldValue();
-    if (strlen($value)) {
+    if (@strlen($value)) {
       return $value;
     } else {
       return null;
@@ -32,7 +32,7 @@
   }
 
   public function setValueFromStorage($value) {
-    if (strlen($value)) {
+    if (@strlen($value)) {
       $value = (int)$value;
     } else {
       $value = null;
@@ -52,7 +52,7 @@
     PhabricatorCursorPagedPolicyAwareQuery $query,
     $value) {
 
-    if (strlen($value)) {
+    if (@strlen($value)) {
       $query->withApplicationSearchContainsConstraint(
         $this->newNumericIndex(null),
         $value);
@@ -83,8 +83,8 @@
 
     foreach ($xactions as $xaction) {
       $value = $xaction->getNewValue();
-      if (strlen($value)) {
-        if (!preg_match('/^-?\d+/', $value)) {
+      if (@strlen($value)) {
+        if (!@preg_match('/^-?\d+/', $value)) {
           $errors[] = new PhabricatorApplicationTransactionValidationError(
             $type,
             pht('Invalid'),
@@ -103,9 +103,9 @@
 
     $old = $xaction->getOldValue();
     $new = $xaction->getNewValue();
-    if (!strlen($old) && strlen($new)) {
+    if (!@strlen($old) && @strlen($new)) {
       return true;
-    } else if (strlen($old) && !strlen($new)) {
+    } else if (@strlen($old) && !@strlen($new)) {
       return true;
     } else {
       return ((int)$old !== (int)$new);
diff --git a/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldLink.php b/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldLink.php
--- a/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldLink.php
+++ b/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldLink.php
@@ -11,7 +11,7 @@
     $indexes = array();
 
     $value = $this->getFieldValue();
-    if (strlen($value)) {
+    if (@strlen($value)) {
       $indexes[] = $this->newStringIndex($value);
     }
 
@@ -21,7 +21,7 @@
   public function renderPropertyViewValue(array $handles) {
     $value = $this->getFieldValue();
 
-    if (!strlen($value)) {
+    if (!@strlen($value)) {
       return null;
     }
 
@@ -51,7 +51,7 @@
     PhabricatorCursorPagedPolicyAwareQuery $query,
     $value) {
 
-    if (is_string($value) && !strlen($value)) {
+    if (is_string($value) && !@strlen($value)) {
       return;
     }
 
diff --git a/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldRemarkup.php b/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldRemarkup.php
--- a/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldRemarkup.php
+++ b/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldRemarkup.php
@@ -30,7 +30,7 @@
   public function renderPropertyViewValue(array $handles) {
     $value = $this->getFieldValue();
 
-    if (!strlen($value)) {
+    if (!@strlen($value)) {
       return null;
     }
 
diff --git a/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldSelect.php b/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldSelect.php
--- a/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldSelect.php
+++ b/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldSelect.php
@@ -11,7 +11,7 @@
     $indexes = array();
 
     $value = $this->getFieldValue();
-    if (strlen($value)) {
+    if (@strlen($value)) {
       $indexes[] = $this->newStringIndex($value);
     }
 
@@ -73,7 +73,7 @@
   }
 
   public function renderPropertyViewValue(array $handles) {
-    if (!strlen($this->getFieldValue())) {
+    if (!@strlen($this->getFieldValue())) {
       return null;
     }
     return idx($this->getOptions(), $this->getFieldValue());
diff --git a/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldText.php b/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldText.php
--- a/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldText.php
+++ b/src/infrastructure/customfield/standard/PhabricatorStandardCustomFieldText.php
@@ -11,7 +11,7 @@
     $indexes = array();
 
     $value = $this->getFieldValue();
-    if (strlen($value)) {
+    if (@strlen($value)) {
       $indexes[] = $this->newStringIndex($value);
     }
 
@@ -30,7 +30,7 @@
     PhabricatorCursorPagedPolicyAwareQuery $query,
     $value) {
 
-    if (strlen($value)) {
+    if (@strlen($value)) {
       $query->withApplicationSearchContainsConstraint(
         $this->newStringIndex(null),
         $value);
diff --git a/src/infrastructure/daemon/PhutilDaemon.php b/src/infrastructure/daemon/PhutilDaemon.php
--- a/src/infrastructure/daemon/PhutilDaemon.php
+++ b/src/infrastructure/daemon/PhutilDaemon.php
@@ -295,7 +295,7 @@
   }
 
   public function didReceiveStdout($data) {
-    if (!strlen($data)) {
+    if (!@strlen($data)) {
       return '';
     }
 
diff --git a/src/infrastructure/daemon/PhutilDaemonHandle.php b/src/infrastructure/daemon/PhutilDaemonHandle.php
--- a/src/infrastructure/daemon/PhutilDaemonHandle.php
+++ b/src/infrastructure/daemon/PhutilDaemonHandle.php
@@ -165,12 +165,12 @@
     list($stdout, $stderr) = $future->read();
     $future->discardBuffers();
 
-    if (strlen($stdout)) {
+    if (@strlen($stdout)) {
       $this->didReadStdout($stdout);
     }
 
     $stderr = trim($stderr);
-    if (strlen($stderr)) {
+    if (@strlen($stderr)) {
       foreach (phutil_split_lines($stderr, false) as $line) {
         $this->logMessage('STDE', $line);
       }
@@ -246,7 +246,7 @@
    * @return string A unique daemon ID.
    */
   private function generateDaemonID() {
-    return substr(getmypid().':'.Filesystem::readRandomCharacters(12), 0, 12);
+    return @substr(getmypid().':'.Filesystem::readRandomCharacters(12), 0, 12);
   }
 
   public function getDaemonID() {
@@ -379,12 +379,12 @@
   private function didReadStdout($data) {
     $this->stdoutBuffer .= $data;
     while (true) {
-      $pos = strpos($this->stdoutBuffer, "\n");
+      $pos = @strpos($this->stdoutBuffer, "\n");
       if ($pos === false) {
         break;
       }
-      $message = substr($this->stdoutBuffer, 0, $pos);
-      $this->stdoutBuffer = substr($this->stdoutBuffer, $pos + 1);
+      $message = @substr($this->stdoutBuffer, 0, $pos);
+      $this->stdoutBuffer = @substr($this->stdoutBuffer, $pos + 1);
 
       try {
         $structure = phutil_json_decode($message);
diff --git a/src/infrastructure/diff/PhabricatorDiffScopeEngine.php b/src/infrastructure/diff/PhabricatorDiffScopeEngine.php
--- a/src/infrastructure/diff/PhabricatorDiffScopeEngine.php
+++ b/src/infrastructure/diff/PhabricatorDiffScopeEngine.php
@@ -97,7 +97,7 @@
 
       // Reject lines which begin with "}" or "{". These lines are probably
       // never good matches.
-      if (preg_match('/^\s*[{}]/i', $line_text)) {
+      if (@preg_match('/^\s*[{}]/i', $line_text)) {
         continue;
       }
 
@@ -131,10 +131,10 @@
         continue;
       }
 
-      $len = strlen($line_text);
+      $len = @strlen($line_text);
 
       // If the line has no actual text, don't assign it a depth.
-      if (!$len || !strlen(trim($line_text))) {
+      if (!$len || !@strlen(trim($line_text))) {
         $depth_map[$line_number] = null;
         continue;
       }
diff --git a/src/infrastructure/diff/PhabricatorDifferenceEngine.php b/src/infrastructure/diff/PhabricatorDifferenceEngine.php
--- a/src/infrastructure/diff/PhabricatorDifferenceEngine.php
+++ b/src/infrastructure/diff/PhabricatorDifferenceEngine.php
@@ -105,7 +105,7 @@
       // instead of being forced to just say "this file didn't change" since we
       // don't have the content.
 
-      $entire_file = explode("\n", $old);
+      $entire_file = @explode("\n", $old);
       foreach ($entire_file as $k => $line) {
         $entire_file[$k] = ' '.$line;
       }
@@ -185,13 +185,13 @@
       $str = $str->getHTMLContent();
     }
 
-    $n = strlen($str);
+    $n = @strlen($str);
     for ($i = 0; $i < $n; $i++) {
 
       if ($p == $e) {
         do {
           if (empty($intra_stack)) {
-            $buf .= substr($str, $i);
+            $buf .= @substr($str, $i);
             break 2;
           }
           $stack = array_shift($intra_stack);
diff --git a/src/infrastructure/diff/inline/PhabricatorDiffInlineCommentContentState.php b/src/infrastructure/diff/inline/PhabricatorDiffInlineCommentContentState.php
--- a/src/infrastructure/diff/inline/PhabricatorDiffInlineCommentContentState.php
+++ b/src/infrastructure/diff/inline/PhabricatorDiffInlineCommentContentState.php
@@ -12,7 +12,7 @@
     }
 
     if ($this->getContentHasSuggestion()) {
-      if (strlen($this->getContentSuggestionText())) {
+      if (@strlen($this->getContentSuggestionText())) {
         return false;
       }
     }
diff --git a/src/infrastructure/diff/inline/PhabricatorInlineCommentContentState.php b/src/infrastructure/diff/inline/PhabricatorInlineCommentContentState.php
--- a/src/infrastructure/diff/inline/PhabricatorInlineCommentContentState.php
+++ b/src/infrastructure/diff/inline/PhabricatorInlineCommentContentState.php
@@ -15,7 +15,7 @@
   }
 
   public function isEmptyContentState() {
-    return !strlen($this->getContentText());
+    return !@strlen($this->getContentText());
   }
 
   public function writeStorageMap() {
diff --git a/src/infrastructure/diff/prose/PhutilProseDiff.php b/src/infrastructure/diff/prose/PhutilProseDiff.php
--- a/src/infrastructure/diff/prose/PhutilProseDiff.php
+++ b/src/infrastructure/diff/prose/PhutilProseDiff.php
@@ -174,8 +174,8 @@
 
     $o_text = $o_merge['text'];
     $n_text = $n_merge['text'];
-    $o_len = strlen($o_text);
-    $n_len = strlen($n_text);
+    $o_len = @strlen($o_text);
+    $n_len = @strlen($n_text);
     $min_len = min($o_len, $n_len);
 
     $prefix_len = 0;
@@ -209,14 +209,14 @@
     if ($prefix_len) {
       $results[] = array(
         'type' => '=',
-        'text' => substr($o_text, 0, $prefix_len),
+        'text' => @substr($o_text, 0, $prefix_len),
       );
     }
 
     if ($prefix_len < $o_len) {
       $results[] = array(
         'type' => '-',
-        'text' => substr(
+        'text' => @substr(
           $o_text,
           $prefix_len,
           $o_len - $prefix_len - $suffix_len),
@@ -226,7 +226,7 @@
     if ($prefix_len < $n_len) {
       $results[] = array(
         'type' => '+',
-        'text' => substr(
+        'text' => @substr(
           $n_text,
           $prefix_len,
           $n_len - $prefix_len - $suffix_len),
@@ -236,7 +236,7 @@
     if ($suffix_len) {
       $results[] = array(
         'type' => '=',
-        'text' => substr($o_text, -$suffix_len),
+        'text' => @substr($o_text, -$suffix_len),
       );
     }
 
@@ -266,23 +266,23 @@
   private function splitTextForSummary($text) {
     $matches = null;
 
-    $ok = preg_match('/^(\n*[^\n]+)\n/', $text, $matches);
+    $ok = @preg_match('/^(\n*[^\n]+)\n/', $text, $matches);
     if (!$ok) {
       return array($text);
     }
 
     $head = $matches[1];
-    $text = substr($text, strlen($head));
+    $text = @substr($text, @strlen($head));
 
-    $ok = preg_match('/\n([^\n]+\n*)\z/', $text, $matches);
+    $ok = @preg_match('/\n([^\n]+\n*)\z/', $text, $matches);
     if (!$ok) {
       return array($text);
     }
 
     $last = $matches[1];
-    $text = substr($text, 0, -strlen($last));
+    $text = @substr($text, 0, -@strlen($last));
 
-    if (!strlen(trim($text))) {
+    if (!@strlen(trim($text))) {
       return array($head, $last);
     } else {
       return array($head, $text, $last);
diff --git a/src/infrastructure/diff/prose/PhutilProseDifferenceEngine.php b/src/infrastructure/diff/prose/PhutilProseDifferenceEngine.php
--- a/src/infrastructure/diff/prose/PhutilProseDifferenceEngine.php
+++ b/src/infrastructure/diff/prose/PhutilProseDifferenceEngine.php
@@ -79,11 +79,11 @@
       } else {
         $old = $block['old'];
         $new = $block['new'];
-        if (!strlen($old) && !strlen($new)) {
+        if (!@strlen($old) && !@strlen($new)) {
           // Nothing to do.
-        } else if (!strlen($old)) {
+        } else if (!@strlen($old)) {
           $result->addPart('+', $new);
-        } else if (!strlen($new)) {
+        } else if (!@strlen($new)) {
           $result->addPart('-', $old);
         } else {
           if ($too_large) {
@@ -180,7 +180,7 @@
     $v_pos = 0;
 
     $edits = $matrix->getEditString();
-    $edits_length = strlen($edits);
+    $edits_length = @strlen($edits);
 
     $diff = new PhutilProseDiff();
     for ($ii = 0; $ii < $edits_length; $ii++) {
@@ -267,16 +267,16 @@
 
     $parts = array();
 
-    $length = strlen($input);
+    $length = @strlen($input);
 
     $corpus = ltrim($input);
-    $l_length = strlen($corpus);
+    $l_length = @strlen($corpus);
     if ($l_length !== $length) {
-      $parts[] = substr($input, 0, $length - $l_length);
+      $parts[] = @substr($input, 0, $length - $l_length);
     }
 
     $corpus = rtrim($corpus);
-    $lr_length = strlen($corpus);
+    $lr_length = @strlen($corpus);
 
     if ($lr_length) {
       $parts[] = $corpus;
@@ -285,7 +285,7 @@
     if ($lr_length !== $l_length) {
       // NOTE: This will be a negative value; we're slicing from the end of
       // the input string.
-      $parts[] = substr($input, $lr_length - $l_length);
+      $parts[] = @substr($input, $lr_length - $l_length);
     }
 
     return $parts;
diff --git a/src/infrastructure/diff/query/PhabricatorDiffInlineCommentQuery.php b/src/infrastructure/diff/query/PhabricatorDiffInlineCommentQuery.php
--- a/src/infrastructure/diff/query/PhabricatorDiffInlineCommentQuery.php
+++ b/src/infrastructure/diff/query/PhabricatorDiffInlineCommentQuery.php
@@ -370,7 +370,7 @@
         continue;
       }
 
-      $saw_context = (strlen(trim($line)) > 3);
+      $saw_context = (@strlen(trim($line)) > 3);
     }
 
     if ($is_head) {
diff --git a/src/infrastructure/diff/view/PHUIDiffGraphView.php b/src/infrastructure/diff/view/PHUIDiffGraphView.php
--- a/src/infrastructure/diff/view/PHUIDiffGraphView.php
+++ b/src/infrastructure/diff/view/PHUIDiffGraphView.php
@@ -97,7 +97,7 @@
             // Go back across all the lines we've already drawn and add a
             // "|" to the end, since this is connected to some future commit
             // we don't know about.
-            for ($jj = strlen($meta['line']); $jj <= $count; $jj++) {
+            for ($jj = @strlen($meta['line']); $jj <= $count; $jj++) {
               $graph[$k]['line'] .= '|';
             }
           }
@@ -158,7 +158,7 @@
       $terminated = array();
       foreach (array_reverse(array_keys($graph)) as $key) {
         $line = $graph[$key]['line'];
-        $len = strlen($line);
+        $len = @strlen($line);
         for ($ii = 0; $ii < $len; $ii++) {
           $c = $line[$ii];
           if ($c == 'o') {
diff --git a/src/infrastructure/diff/view/PHUIDiffInlineCommentDetailView.php b/src/infrastructure/diff/view/PHUIDiffInlineCommentDetailView.php
--- a/src/infrastructure/diff/view/PHUIDiffInlineCommentDetailView.php
+++ b/src/infrastructure/diff/view/PHUIDiffInlineCommentDetailView.php
@@ -526,13 +526,13 @@
     $old_lines = $context->getBodyLines();
     $old_lines = implode('', $old_lines);
     $old_lines = $head_lines.$old_lines.$tail_lines;
-    if (strlen($old_lines) && !preg_match('/\n\z/', $old_lines)) {
+    if (@strlen($old_lines) && !@preg_match('/\n\z/', $old_lines)) {
       $old_lines .= "\n";
     }
 
     $new_lines = $content_state->getContentSuggestionText();
     $new_lines = $head_lines.$new_lines.$tail_lines;
-    if (strlen($new_lines) && !preg_match('/\n\z/', $new_lines)) {
+    if (@strlen($new_lines) && !@preg_match('/\n\z/', $new_lines)) {
       $new_lines .= "\n";
     }
 
diff --git a/src/infrastructure/diff/view/PHUIDiffTableOfContentsItemView.php b/src/infrastructure/diff/view/PHUIDiffTableOfContentsItemView.php
--- a/src/infrastructure/diff/view/PHUIDiffTableOfContentsItemView.php
+++ b/src/infrastructure/diff/view/PHUIDiffTableOfContentsItemView.php
@@ -139,7 +139,7 @@
     $not_applicable = '-';
 
     $coverage = $this->getCoverage();
-    if (!strlen($coverage)) {
+    if (!@strlen($coverage)) {
       return $not_applicable;
     }
 
@@ -157,7 +157,7 @@
     $not_applicable = '-';
 
     $coverage = $this->getCoverage();
-    if (!strlen($coverage)) {
+    if (!@strlen($coverage)) {
       return $not_applicable;
     }
 
diff --git a/src/infrastructure/diff/view/PHUIDiffTableOfContentsListView.php b/src/infrastructure/diff/view/PHUIDiffTableOfContentsListView.php
--- a/src/infrastructure/diff/view/PHUIDiffTableOfContentsListView.php
+++ b/src/infrastructure/diff/view/PHUIDiffTableOfContentsListView.php
@@ -327,12 +327,12 @@
     $edits = preg_replace('/(d+)(x+)/', '\2\1', $edits);
 
     $vector = array();
-    $length = strlen($edits);
+    $length = @strlen($edits);
 
     $old_cursor = 0;
     $new_cursor = 0;
 
-    for ($ii = 0; $ii < strlen($edits); $ii++) {
+    for ($ii = 0; $ii < @strlen($edits); $ii++) {
       $c = $edits[$ii];
       switch ($c) {
         case 'i':
diff --git a/src/infrastructure/edges/query/PhabricatorEdgeObjectQuery.php b/src/infrastructure/edges/query/PhabricatorEdgeObjectQuery.php
--- a/src/infrastructure/edges/query/PhabricatorEdgeObjectQuery.php
+++ b/src/infrastructure/edges/query/PhabricatorEdgeObjectQuery.php
@@ -169,14 +169,14 @@
   }
 
   private function parseCursor($cursor) {
-    if (!preg_match('/^\d+_\d+\z/', $cursor)) {
+    if (!@preg_match('/^\d+_\d+\z/', $cursor)) {
       $this->throwCursorException(
         pht(
           'Expected edge cursor in the form "0123_6789", got "%s".',
           $cursor));
     }
 
-    return explode('_', $cursor);
+    return @explode('_', $cursor);
   }
 
 }
diff --git a/src/infrastructure/editor/PhabricatorEditorURIEngine.php b/src/infrastructure/editor/PhabricatorEditorURIEngine.php
--- a/src/infrastructure/editor/PhabricatorEditorURIEngine.php
+++ b/src/infrastructure/editor/PhabricatorEditorURIEngine.php
@@ -16,7 +16,7 @@
 
     $pattern = $viewer->getUserSetting(PhabricatorEditorSetting::SETTINGKEY);
 
-    if (!strlen(trim($pattern))) {
+    if (!@strlen(trim($pattern))) {
       return null;
     }
 
@@ -313,7 +313,7 @@
   public static function newPatternTokens($raw_pattern) {
     $token_positions = array();
 
-    $len = strlen($raw_pattern);
+    $len = @strlen($raw_pattern);
 
     for ($ii = 0; $ii < $len; $ii++) {
       $c = $raw_pattern[$ii];
@@ -344,7 +344,7 @@
       if ($token_len > 0) {
         $tokens[] = array(
           'type' => 'literal',
-          'value' => substr($raw_pattern, $cursor, $token_len),
+          'value' => @substr($raw_pattern, $cursor, $token_len),
         );
       }
 
@@ -353,7 +353,7 @@
       if ($cursor < $len) {
         $tokens[] = array(
           'type' => 'variable',
-          'value' => substr($raw_pattern, $cursor + 1, 1),
+          'value' => @substr($raw_pattern, $cursor + 1, 1),
         );
       }
 
diff --git a/src/infrastructure/env/PhabricatorEnv.php b/src/infrastructure/env/PhabricatorEnv.php
--- a/src/infrastructure/env/PhabricatorEnv.php
+++ b/src/infrastructure/env/PhabricatorEnv.php
@@ -125,7 +125,7 @@
     // If an instance identifier is defined, write it into the environment so
     // it's available to subprocesses.
     $instance = self::getEnvConfig('cluster.instance');
-    if (strlen($instance)) {
+    if (@strlen($instance)) {
       putenv('PHABRICATOR_INSTANCE='.$instance);
       $_ENV['PHABRICATOR_INSTANCE'] = $instance;
     }
@@ -432,7 +432,7 @@
     $uri = new PhutilURI($raw_uri);
 
     $host = $uri->getDomain();
-    if (!strlen($host)) {
+    if (!@strlen($host)) {
       return false;
     }
 
@@ -455,7 +455,7 @@
     $self_map = array();
     foreach ($self_uris as $self_uri) {
       $host = id(new PhutilURI($self_uri))->getDomain();
-      if (!strlen($host)) {
+      if (!@strlen($host)) {
         continue;
       }
 
@@ -661,11 +661,11 @@
   public static function isValidLocalURIForLink($uri) {
     $uri = (string)$uri;
 
-    if (!strlen($uri)) {
+    if (!@strlen($uri)) {
       return false;
     }
 
-    if (preg_match('/\s/', $uri)) {
+    if (@preg_match('/\s/', $uri)) {
       // PHP hasn't been vulnerable to header injection attacks for a bunch of
       // years, but we can safely reject these anyway since they're never valid.
       return false;
@@ -682,14 +682,14 @@
     // Since we currently never generate URIs with backslashes in them, reject
     // these unconditionally rather than trying to figure out how browsers will
     // interpret them.
-    if (preg_match('/\\\\/', $uri)) {
+    if (@preg_match('/\\\\/', $uri)) {
       return false;
     }
 
     // Valid URIs must begin with '/', followed by the end of the string or some
     // other non-'/' character. This rejects protocol-relative URIs like
     // "//evil.com/evil_stuff/".
-    return (bool)preg_match('@^/([^/]|$)@', $uri);
+    return (bool)@preg_match('@^/([^/]|$)@', $uri);
   }
 
 
@@ -726,7 +726,7 @@
     $uri = new PhutilURI($raw_uri);
 
     $proto = $uri->getProtocol();
-    if (!strlen($proto)) {
+    if (!@strlen($proto)) {
       throw new Exception(
         pht(
           'URI "%s" is not a valid linkable resource. A valid linkable '.
@@ -745,7 +745,7 @@
     }
 
     $domain = $uri->getDomain();
-    if (!strlen($domain)) {
+    if (!@strlen($domain)) {
       throw new Exception(
         pht(
           'URI "%s" is not a valid linkable resource. A valid linkable '.
@@ -793,7 +793,7 @@
     $uri = new PhutilURI($raw_uri);
 
     $proto = $uri->getProtocol();
-    if (!strlen($proto)) {
+    if (!@strlen($proto)) {
       throw new Exception(
         pht(
           'URI "%s" is not a valid fetchable resource. A valid fetchable '.
@@ -812,7 +812,7 @@
     }
 
     $domain = $uri->getDomain();
-    if (!strlen($domain)) {
+    if (!@strlen($domain)) {
       throw new Exception(
         pht(
           'URI "%s" is not a valid fetchable resource. A valid fetchable '.
diff --git a/src/infrastructure/export/field/PhabricatorOptionExportField.php b/src/infrastructure/export/field/PhabricatorOptionExportField.php
--- a/src/infrastructure/export/field/PhabricatorOptionExportField.php
+++ b/src/infrastructure/export/field/PhabricatorOptionExportField.php
@@ -19,7 +19,7 @@
       return $value;
     }
 
-    if (!strlen($value)) {
+    if (!@strlen($value)) {
       return null;
     }
 
diff --git a/src/infrastructure/export/field/PhabricatorStringExportField.php b/src/infrastructure/export/field/PhabricatorStringExportField.php
--- a/src/infrastructure/export/field/PhabricatorStringExportField.php
+++ b/src/infrastructure/export/field/PhabricatorStringExportField.php
@@ -8,7 +8,7 @@
       return $value;
     }
 
-    if (!strlen($value)) {
+    if (!@strlen($value)) {
       return null;
     }
 
diff --git a/src/infrastructure/export/format/PhabricatorCSVExportFormat.php b/src/infrastructure/export/format/PhabricatorCSVExportFormat.php
--- a/src/infrastructure/export/format/PhabricatorCSVExportFormat.php
+++ b/src/infrastructure/export/format/PhabricatorCSVExportFormat.php
@@ -48,11 +48,11 @@
       // like it might be too tempting for Excel to ignore, mangle the value
       // to dissuade remote code execution. See T12800.
 
-      if (preg_match('/^\s*[+=@-]/', $value)) {
+      if (@preg_match('/^\s*[+=@-]/', $value)) {
         $value = '(!) '.$value;
       }
 
-      if (preg_match('/\s|,|\"/', $value)) {
+      if (@preg_match('/\s|,|\"/', $value)) {
         $value = str_replace('"', '""', $value);
         $value = '"'.$value.'"';
       }
diff --git a/src/infrastructure/javelin/markup.php b/src/infrastructure/javelin/markup.php
--- a/src/infrastructure/javelin/markup.php
+++ b/src/infrastructure/javelin/markup.php
@@ -77,7 +77,7 @@
   $is_post = (strcasecmp($http_method, 'POST') === 0);
 
   $http_action = idx($attributes, 'action');
-  $is_absolute_uri = preg_match('#^(https?:|//)#', $http_action);
+  $is_absolute_uri = @preg_match('#^(https?:|//)#', $http_action);
 
   if ($is_post) {
 
diff --git a/src/infrastructure/lint/linter/PhabricatorJavelinLinter.php b/src/infrastructure/lint/linter/PhabricatorJavelinLinter.php
--- a/src/infrastructure/lint/linter/PhabricatorJavelinLinter.php
+++ b/src/infrastructure/lint/linter/PhabricatorJavelinLinter.php
@@ -98,7 +98,7 @@
   }
 
   private function shouldIgnorePath($path) {
-    return preg_match('@/__tests__/|externals/javelin/docs/@', $path);
+    return @preg_match('@/__tests__/|externals/javelin/docs/@', $path);
   }
 
   public function lintPath($path) {
@@ -127,7 +127,7 @@
 
     list($uses, $installs) = $this->getUsedAndInstalledSymbolsForPath($path);
     foreach ($uses as $symbol => $line) {
-      $parts = explode('.', $symbol);
+      $parts = @explode('.', $symbol);
       foreach ($parts as $part) {
         if ($part[0] == '_' && $part[1] != '_') {
           $base = implode('.', array_slice($parts, 0, 2));
@@ -149,7 +149,7 @@
 
     $external_classes = array();
     foreach ($uses as $symbol => $line) {
-      $parts = explode('.', $symbol);
+      $parts = @explode('.', $symbol);
       $class = implode('.', array_slice($parts, 0, 2));
       if (!array_key_exists($class, $external_classes) &&
           !array_key_exists($class, $installs)) {
@@ -165,7 +165,7 @@
       $path);
     $need = $external_classes;
 
-    $resource_name = substr($path, strlen('webroot/'));
+    $resource_name = @substr($path, @strlen('webroot/'));
     $requires = $celerity->getRequiredSymbolsForName($resource_name);
     if (!$requires) {
       $requires = array();
@@ -187,7 +187,7 @@
         continue;
       }
 
-      if (preg_match('/\\.css$/', $requires_name)) {
+      if (@preg_match('/\\.css$/', $requires_name)) {
         // If JS requires CSS, just assume everything is fine.
         unset($requires[$key]);
       } else {
@@ -248,10 +248,10 @@
       return array($uses, $installs);
     }
 
-    $symbols = explode("\n", trim($symbols));
+    $symbols = @explode("\n", trim($symbols));
     foreach ($symbols as $line) {
       $matches = null;
-      if (!preg_match('/^([?+\*])([^:]*):(\d+)$/', $line, $matches)) {
+      if (!@preg_match('/^([?+\*])([^:]*):(\d+)$/', $line, $matches)) {
         throw new Exception(
           pht('Received malformed output from `%s`.', 'javelinsymbols'));
       }
diff --git a/src/infrastructure/lipsum/PhutilContextFreeGrammar.php b/src/infrastructure/lipsum/PhutilContextFreeGrammar.php
--- a/src/infrastructure/lipsum/PhutilContextFreeGrammar.php
+++ b/src/infrastructure/lipsum/PhutilContextFreeGrammar.php
@@ -33,13 +33,13 @@
 
     foreach (array_reverse($matches[1]) as $token_spec) {
       list($token, $offset) = $token_spec;
-      $token_name = substr($token, 1, -1);
+      $token_name = @substr($token, 1, -1);
       $options = array();
 
-      if (($name_end = strpos($token_name, ','))) {
+      if (($name_end = @strpos($token_name, ','))) {
         $options_parser = new PhutilSimpleOptions();
         $options = $options_parser->parse($token_name);
-        $token_name = substr($token_name, 0, $name_end);
+        $token_name = @substr($token_name, 0, $name_end);
       }
 
       if (empty($rules[$token_name])) {
@@ -75,7 +75,7 @@
         $replacement = "\n".$replacement."\n";
       }
 
-      $input = substr_replace($input, $replacement, $offset, strlen($token));
+      $input = substr_replace($input, $replacement, $offset, @strlen($token));
     }
 
     return $input;
diff --git a/src/infrastructure/log/PhabricatorProtocolLog.php b/src/infrastructure/log/PhabricatorProtocolLog.php
--- a/src/infrastructure/log/PhabricatorProtocolLog.php
+++ b/src/infrastructure/log/PhabricatorProtocolLog.php
@@ -24,7 +24,7 @@
   }
 
   public function didWriteBytes($bytes) {
-    if (!strlen($bytes)) {
+    if (!@strlen($bytes)) {
       return;
     }
 
@@ -33,7 +33,7 @@
   }
 
   public function didReadBytes($bytes) {
-    if (!strlen($bytes)) {
+    if (!@strlen($bytes)) {
       return;
     }
 
@@ -52,7 +52,7 @@
   private function writeFrame($header, $frame) {
     $this->flush();
 
-    $frame = explode("\n", $frame);
+    $frame = @explode("\n", $frame);
     foreach ($frame as $key => $line) {
       $frame[$key] = $header.'  '.$this->escapeBytes($line);
     }
@@ -84,14 +84,14 @@
 
     $bytes = implode('', $bytes);
 
-    if (strlen($bytes)) {
+    if (@strlen($bytes)) {
       $this->writeBytes($mode, $bytes);
     }
   }
 
   private function writeBytes($mode, $bytes) {
     $header = $mode;
-    $len = strlen($bytes);
+    $len = @strlen($bytes);
 
     $out = array();
     switch ($mode) {
@@ -151,20 +151,20 @@
     $pos = 0;
     $lines = array();
     while (true) {
-      $next_break = strpos($bytes, "\n", $pos);
+      $next_break = @strpos($bytes, "\n", $pos);
       if ($next_break === false) {
-        $len = strlen($bytes) - $pos;
+        $len = @strlen($bytes) - $pos;
       } else {
         $len = ($next_break - $pos) + 1;
       }
       $len = min($bytes_per_line, $len);
 
-      $next_bytes = substr($bytes, $pos, $len);
+      $next_bytes = @substr($bytes, $pos, $len);
 
       $chunk_parts = array();
       foreach (str_split($next_bytes, $bytes_per_chunk) as $chunk) {
         $chunk_display = '';
-        for ($ii = 0; $ii < strlen($chunk); $ii++) {
+        for ($ii = 0; $ii < @strlen($chunk); $ii++) {
           $chunk_display .= sprintf('%02x', ord($chunk[$ii]));
         }
         $chunk_parts[] = $chunk_display;
@@ -178,7 +178,7 @@
 
       $pos += $len;
 
-      if ($pos >= strlen($bytes)) {
+      if ($pos >= @strlen($bytes)) {
         break;
       }
     }
@@ -190,7 +190,7 @@
 
   private function escapeBytes($bytes) {
     $result = '';
-    for ($ii = 0; $ii < strlen($bytes); $ii++) {
+    for ($ii = 0; $ii < @strlen($bytes); $ii++) {
       $c = $bytes[$ii];
       $o = ord($c);
 
diff --git a/src/infrastructure/log/PhabricatorSSHLog.php b/src/infrastructure/log/PhabricatorSSHLog.php
--- a/src/infrastructure/log/PhabricatorSSHLog.php
+++ b/src/infrastructure/log/PhabricatorSSHLog.php
@@ -24,7 +24,7 @@
       );
 
       $sudo_user = PhabricatorEnv::getEnvConfig('phd.user');
-      if (strlen($sudo_user)) {
+      if (@strlen($sudo_user)) {
         $data['S'] = $sudo_user;
       }
 
@@ -35,8 +35,8 @@
       }
 
       $client = getenv('SSH_CLIENT');
-      if (strlen($client)) {
-        $remote_address = head(explode(' ', $client));
+      if (@strlen($client)) {
+        $remote_address = head(@explode(' ', $client));
         $data['r'] = $remote_address;
       }
 
diff --git a/src/infrastructure/management/PhabricatorManagementWorkflow.php b/src/infrastructure/management/PhabricatorManagementWorkflow.php
--- a/src/infrastructure/management/PhabricatorManagementWorkflow.php
+++ b/src/infrastructure/management/PhabricatorManagementWorkflow.php
@@ -14,7 +14,7 @@
   }
 
   protected function parseTimeArgument($time) {
-    if (!strlen($time)) {
+    if (!@strlen($time)) {
       return null;
     }
 
@@ -86,8 +86,8 @@
       }
 
       // If the value is "@..." and then some text, treat it as a username.
-      if ((strlen($identifier) > 1) && ($identifier[0] == '@')) {
-        $usernames[$identifier] = substr($identifier, 1);
+      if ((@strlen($identifier) > 1) && ($identifier[0] == '@')) {
+        $usernames[$identifier] = @substr($identifier, 1);
         continue;
       }
 
diff --git a/src/infrastructure/markup/PhabricatorMarkupEngine.php b/src/infrastructure/markup/PhabricatorMarkupEngine.php
--- a/src/infrastructure/markup/PhabricatorMarkupEngine.php
+++ b/src/infrastructure/markup/PhabricatorMarkupEngine.php
@@ -662,12 +662,12 @@
       // distinguish standard paragraphs from things like image macros. It may
       // not work well for non-latin text. We prefer to summarize with a
       // paragraph of normal words over an image macro, if possible.
-      $has_space = preg_match('/\w\s\w/', $block);
+      $has_space = @preg_match('/\w\s\w/', $block);
 
       // This is a test to find embedded images and headers. We prefer to
       // summarize with a normal paragraph over a header or an embedded object,
       // if possible.
-      $has_embed = preg_match('/^[{=]/', $block);
+      $has_embed = @preg_match('/^[{=]/', $block);
 
       if ($has_space && !$has_embed) {
         // This seems like a good summary, so return it.
diff --git a/src/infrastructure/markup/PhutilRemarkupBlockStorage.php b/src/infrastructure/markup/PhutilRemarkupBlockStorage.php
--- a/src/infrastructure/markup/PhutilRemarkupBlockStorage.php
+++ b/src/infrastructure/markup/PhutilRemarkupBlockStorage.php
@@ -82,7 +82,7 @@
 
       // If the content contains no token magic, we don't need to replace
       // anything.
-      if (strpos($content, self::MAGIC_BYTE) === false) {
+      if (@strpos($content, self::MAGIC_BYTE) === false) {
         continue;
       }
 
@@ -133,18 +133,18 @@
 
         // If there were any non-token bytes since the last token, add them.
         if ($subpos > $pos) {
-          $parts[] = substr($content, $pos, $subpos - $pos);
+          $parts[] = @substr($content, $pos, $subpos - $pos);
         }
 
         // Add the token replacement text.
         $parts[] = $map[$subkey];
 
         // Move the non-token cursor forward over the token.
-        $pos = $subpos + strlen($subkey);
+        $pos = $subpos + @strlen($subkey);
       }
 
       // Add any leftover non-token bytes after the last token.
-      $parts[] = substr($content, $pos);
+      $parts[] = @substr($content, $pos);
 
       $content = implode('', $parts);
 
diff --git a/src/infrastructure/markup/blockrule/PhutilRemarkupBlockRule.php b/src/infrastructure/markup/blockrule/PhutilRemarkupBlockRule.php
--- a/src/infrastructure/markup/blockrule/PhutilRemarkupBlockRule.php
+++ b/src/infrastructure/markup/blockrule/PhutilRemarkupBlockRule.php
@@ -102,7 +102,7 @@
       foreach ($out_rows as $r => $row) {
         foreach ($row['content'] as $c => $cell) {
           $text = $this->getEngine()->restoreText($cell['content']);
-          $lengths[$c][$r] = phutil_utf8_strlen($text);
+          $lengths[$c][$r] = phutil_utf8strlen($text);
         }
       }
       $max_lengths = array_map('max', $lengths);
diff --git a/src/infrastructure/markup/blockrule/PhutilRemarkupCodeBlockRule.php b/src/infrastructure/markup/blockrule/PhutilRemarkupCodeBlockRule.php
--- a/src/infrastructure/markup/blockrule/PhutilRemarkupCodeBlockRule.php
+++ b/src/infrastructure/markup/blockrule/PhutilRemarkupCodeBlockRule.php
@@ -5,9 +5,9 @@
   public function getMatchingLineCount(array $lines, $cursor) {
     $num_lines = 0;
     $match_ticks = null;
-    if (preg_match('/^(\s{2,}).+/', $lines[$cursor])) {
+    if (@preg_match('/^(\s{2,}).+/', $lines[$cursor])) {
       $match_ticks = false;
-    } else if (preg_match('/^\s*(```)/', $lines[$cursor])) {
+    } else if (@preg_match('/^\s*(```)/', $lines[$cursor])) {
       $match_ticks = true;
     } else {
       return $num_lines;
@@ -16,7 +16,7 @@
     $num_lines++;
 
     if ($match_ticks &&
-        preg_match('/^\s*(```)(.*)(```)\s*$/', $lines[$cursor])) {
+        @preg_match('/^\s*(```)(.*)(```)\s*$/', $lines[$cursor])) {
       return $num_lines;
     }
 
@@ -24,14 +24,14 @@
 
     while (isset($lines[$cursor])) {
       if ($match_ticks) {
-        if (preg_match('/```\s*$/', $lines[$cursor])) {
+        if (@preg_match('/```\s*$/', $lines[$cursor])) {
           $num_lines++;
           break;
         }
         $num_lines++;
       } else {
-        if (strlen(trim($lines[$cursor]))) {
-          if (!preg_match('/^\s{2,}/', $lines[$cursor])) {
+        if (@strlen(trim($lines[$cursor]))) {
+          if (!@preg_match('/^\s{2,}/', $lines[$cursor])) {
             break;
           }
         }
@@ -44,15 +44,15 @@
   }
 
   public function markupText($text, $children) {
-    if (preg_match('/^\s*```/', $text)) {
+    if (@preg_match('/^\s*```/', $text)) {
       // If this is a ```-style block, trim off the backticks and any leading
       // blank line.
       $text = preg_replace('/^\s*```(\s*\n)?/', '', $text);
       $text = preg_replace('/```\s*$/', '', $text);
     }
 
-    $lines = explode("\n", $text);
-    while ($lines && !strlen(last($lines))) {
+    $lines = @explode("\n", $text);
+    while ($lines && !@strlen(last($lines))) {
       unset($lines[last_key($lines)]);
     }
 
@@ -82,7 +82,7 @@
     // Normalize the text back to a 0-level indent.
     $min_indent = 80;
     foreach ($lines as $line) {
-      for ($ii = 0; $ii < strlen($line); $ii++) {
+      for ($ii = 0; $ii < @strlen($line); $ii++) {
         if ($line[$ii] != ' ') {
           $min_indent = min($ii, $min_indent);
           break;
diff --git a/src/infrastructure/markup/blockrule/PhutilRemarkupDefaultBlockRule.php b/src/infrastructure/markup/blockrule/PhutilRemarkupDefaultBlockRule.php
--- a/src/infrastructure/markup/blockrule/PhutilRemarkupDefaultBlockRule.php
+++ b/src/infrastructure/markup/blockrule/PhutilRemarkupDefaultBlockRule.php
@@ -27,7 +27,7 @@
       $text = phutil_escape_html_newlines($text);
     }
 
-    if (!strlen($text)) {
+    if (!@strlen($text)) {
       return null;
     }
 
diff --git a/src/infrastructure/markup/blockrule/PhutilRemarkupHeaderBlockRule.php b/src/infrastructure/markup/blockrule/PhutilRemarkupHeaderBlockRule.php
--- a/src/infrastructure/markup/blockrule/PhutilRemarkupHeaderBlockRule.php
+++ b/src/infrastructure/markup/blockrule/PhutilRemarkupHeaderBlockRule.php
@@ -4,12 +4,12 @@
 
   public function getMatchingLineCount(array $lines, $cursor) {
     $num_lines = 0;
-    if (preg_match('/^(={1,5}|#{2,5}|# ).*+$/', $lines[$cursor])) {
+    if (@preg_match('/^(={1,5}|#{2,5}|# ).*+$/', $lines[$cursor])) {
       $num_lines = 1;
     } else {
       if (isset($lines[$cursor + 1])) {
         $line = $lines[$cursor].$lines[$cursor + 1];
-        if (preg_match('/^([^\n]+)\n[-=]{2,}\s*$/', $line)) {
+        if (@preg_match('/^([^\n]+)\n[-=]{2,}\s*$/', $line)) {
           $num_lines = 2;
           $cursor++;
         }
@@ -18,7 +18,7 @@
 
     if ($num_lines) {
       $cursor++;
-      while (isset($lines[$cursor]) && !strlen(trim($lines[$cursor]))) {
+      while (isset($lines[$cursor]) && !@strlen(trim($lines[$cursor]))) {
         $num_lines++;
         $cursor++;
       }
@@ -38,7 +38,7 @@
       $text = trim($lines[0]);
     } else {
       $level = 0;
-      for ($ii = 0; $ii < min(5, strlen($text)); $ii++) {
+      for ($ii = 0; $ii < min(5, @strlen($text)); $ii++) {
         if ($text[$ii] == '=' || $text[$ii] == '#') {
           ++$level;
         } else {
@@ -52,7 +52,7 @@
 
     if ($engine->isTextMode()) {
       $char = ($level == 1) ? '=' : '-';
-      return $text."\n".str_repeat($char, phutil_utf8_strlen($text));
+      return $text."\n".str_repeat($char, phutil_utf8strlen($text));
     }
 
     $use_anchors = $engine->getConfig('header.generate-toc');
@@ -90,7 +90,7 @@
 
     $anchor = self::getAnchorNameFromHeaderText($plain_text);
 
-    if (!strlen($anchor)) {
+    if (!@strlen($anchor)) {
       return null;
     }
 
diff --git a/src/infrastructure/markup/blockrule/PhutilRemarkupHorizontalRuleBlockRule.php b/src/infrastructure/markup/blockrule/PhutilRemarkupHorizontalRuleBlockRule.php
--- a/src/infrastructure/markup/blockrule/PhutilRemarkupHorizontalRuleBlockRule.php
+++ b/src/infrastructure/markup/blockrule/PhutilRemarkupHorizontalRuleBlockRule.php
@@ -14,10 +14,10 @@
   public function getMatchingLineCount(array $lines, $cursor) {
     $num_lines = 0;
     $pattern = '/^\s*(?:_{3,}|\*\s?\*\s?\*(\s|\*)*|\-\s?\-\s?\-(\s|\-)*)$/';
-    if (preg_match($pattern, rtrim($lines[$cursor], "\n\r"))) {
+    if (@preg_match($pattern, rtrim($lines[$cursor], "\n\r"))) {
       $num_lines++;
       $cursor++;
-      while (isset($lines[$cursor]) && !strlen(trim($lines[$cursor]))) {
+      while (isset($lines[$cursor]) && !@strlen(trim($lines[$cursor]))) {
         $num_lines++;
         $cursor++;
       }
diff --git a/src/infrastructure/markup/blockrule/PhutilRemarkupInterpreterBlockRule.php b/src/infrastructure/markup/blockrule/PhutilRemarkupInterpreterBlockRule.php
--- a/src/infrastructure/markup/blockrule/PhutilRemarkupInterpreterBlockRule.php
+++ b/src/infrastructure/markup/blockrule/PhutilRemarkupInterpreterBlockRule.php
@@ -8,11 +8,11 @@
   public function getMatchingLineCount(array $lines, $cursor) {
     $num_lines = 0;
 
-    if (preg_match(self::START_BLOCK_PATTERN, $lines[$cursor])) {
+    if (@preg_match(self::START_BLOCK_PATTERN, $lines[$cursor])) {
       $num_lines++;
 
       while (isset($lines[$cursor])) {
-        if (preg_match(self::END_BLOCK_PATTERN, $lines[$cursor])) {
+        if (@preg_match(self::END_BLOCK_PATTERN, $lines[$cursor])) {
           break;
         }
         $num_lines++;
@@ -24,7 +24,7 @@
   }
 
   public function markupText($text, $children) {
-    $lines = explode("\n", $text);
+    $lines = @explode("\n", $text);
     $first_key = head_key($lines);
     $last_key = last_key($lines);
     while (trim($lines[$last_key]) === '') {
@@ -33,7 +33,7 @@
     }
     $matches = null;
 
-    preg_match(self::START_BLOCK_PATTERN, head($lines), $matches);
+    @preg_match(self::START_BLOCK_PATTERN, head($lines), $matches);
 
     $argv = array();
     if (isset($matches[2])) {
diff --git a/src/infrastructure/markup/blockrule/PhutilRemarkupListBlockRule.php b/src/infrastructure/markup/blockrule/PhutilRemarkupListBlockRule.php
--- a/src/infrastructure/markup/blockrule/PhutilRemarkupListBlockRule.php
+++ b/src/infrastructure/markup/blockrule/PhutilRemarkupListBlockRule.php
@@ -17,14 +17,14 @@
     $is_one_line = false;
     while (isset($lines[$cursor])) {
       if (!$num_lines) {
-        if (preg_match(self::START_BLOCK_PATTERN, $lines[$cursor])) {
+        if (@preg_match(self::START_BLOCK_PATTERN, $lines[$cursor])) {
           $num_lines++;
           $cursor++;
           $is_one_line = true;
           continue;
         }
       } else {
-        if (preg_match(self::CONT_BLOCK_PATTERN, $lines[$cursor])) {
+        if (@preg_match(self::CONT_BLOCK_PATTERN, $lines[$cursor])) {
           $num_lines++;
           $cursor++;
           $is_one_line = false;
@@ -34,14 +34,14 @@
         // Allow lists to continue across multiple paragraphs, as long as lines
         // are indented or a single empty line separates indented lines.
 
-        $this_empty = !strlen(trim($lines[$cursor]));
-        $this_indented = preg_match('/^ /', $lines[$cursor]);
+        $this_empty = !@strlen(trim($lines[$cursor]));
+        $this_indented = @preg_match('/^ /', $lines[$cursor]);
 
         $next_empty = true;
         $next_indented = false;
         if (isset($lines[$cursor + 1])) {
-          $next_empty = !strlen(trim($lines[$cursor + 1]));
-          $next_indented = preg_match('/^ /', $lines[$cursor + 1]);
+          $next_empty = !@strlen(trim($lines[$cursor + 1]));
+          $next_indented = @preg_match('/^ /', $lines[$cursor + 1]);
         }
 
         if ($this_empty || $this_indented) {
@@ -87,7 +87,7 @@
 
   public function markupText($text, $children) {
     $items = array();
-    $lines = explode("\n", $text);
+    $lines = @explode("\n", $text);
 
     // We allow users to delimit lists using either differing indentation
     // levels:
@@ -109,10 +109,10 @@
     $min_space = PHP_INT_MAX;
     foreach ($lines as $ii => $line) {
       $matches = null;
-      if (preg_match($regex, $line)) {
+      if (@preg_match($regex, $line)) {
         $regex = self::CONT_BLOCK_PATTERN;
-        if (preg_match('/^(\s+)/', $line, $matches)) {
-          $space = strlen($matches[1]);
+        if (@preg_match('/^(\s+)/', $line, $matches)) {
+          $space = @strlen($matches[1]);
         } else {
           $space = 0;
         }
@@ -123,9 +123,9 @@
     $regex = self::START_BLOCK_PATTERN;
     if ($min_space) {
       foreach ($lines as $key => $line) {
-        if (preg_match($regex, $line)) {
+        if (@preg_match($regex, $line)) {
           $regex = self::CONT_BLOCK_PATTERN;
-          $lines[$key] = substr($line, $min_space);
+          $lines[$key] = @substr($line, $min_space);
         }
       }
     }
@@ -155,7 +155,7 @@
     $regex = self::START_BLOCK_PATTERN;
     foreach ($lines as $line) {
       $match = null;
-      if (preg_match($regex, $line, $match)) {
+      if (@preg_match($regex, $line, $match)) {
         if (!$starts_at && !empty($match[1])) {
           $starts_at = $match[1];
         }
@@ -208,23 +208,23 @@
 
       $item = rtrim($item);
 
-      if (!strlen($item)) {
+      if (!@strlen($item)) {
         unset($items[$key]);
         continue;
       }
 
       $matches = null;
-      if (preg_match('/^\s*([-*#]{2,})/', $item, $matches)) {
+      if (@preg_match('/^\s*([-*#]{2,})/', $item, $matches)) {
         // Alternate-style indents; use number of list item symbols.
-        $depth = strlen($matches[1]) - 1;
-      } else if (preg_match('/^(\s+)/', $item, $matches)) {
+        $depth = @strlen($matches[1]) - 1;
+      } else if (@preg_match('/^(\s+)/', $item, $matches)) {
         // Markdown-style indents; use indent depth.
-        $depth = strlen($matches[1]);
+        $depth = @strlen($matches[1]);
       } else {
         $depth = 0;
       }
 
-      if (preg_match('/^\s*(?:#|[0-9])/', $item)) {
+      if (@preg_match('/^\s*(?:#|[0-9])/', $item)) {
         $style = '#';
       } else {
         $style = '-';
@@ -238,14 +238,14 @@
       // are often used as footnotes.
       $mark = null;
       $matches = null;
-      if (preg_match('/^\s*\[(\D?)\]\s*/', $text, $matches)) {
-        if (strlen(trim($matches[1]))) {
+      if (@preg_match('/^\s*\[(\D?)\]\s*/', $text, $matches)) {
+        if (@strlen(trim($matches[1]))) {
           $mark = true;
         } else {
           $mark = false;
         }
         $has_marks = true;
-        $text = substr($text, strlen($matches[0]));
+        $text = @substr($text, @strlen($matches[0]));
       }
 
       $items[$key] = array(
diff --git a/src/infrastructure/markup/blockrule/PhutilRemarkupLiteralBlockRule.php b/src/infrastructure/markup/blockrule/PhutilRemarkupLiteralBlockRule.php
--- a/src/infrastructure/markup/blockrule/PhutilRemarkupLiteralBlockRule.php
+++ b/src/infrastructure/markup/blockrule/PhutilRemarkupLiteralBlockRule.php
@@ -26,7 +26,7 @@
     $end_pattern = '(%%%\s*$)';
     $trivial_pattern = '(^\s*%%%\s*$)';
 
-    if (!preg_match($start_pattern, $lines[$cursor])) {
+    if (!@preg_match($start_pattern, $lines[$cursor])) {
       return 0;
     }
 
@@ -42,7 +42,7 @@
       $line = $lines[$cursor];
 
       if ($block_start === null) {
-        $is_start = preg_match($start_pattern, $line);
+        $is_start = @preg_match($start_pattern, $line);
 
         // If we've matched a block and then consumed one or more empty lines
         // after it, stop merging more blocks into the match.
@@ -56,12 +56,12 @@
       }
 
       if ($block_start !== null) {
-        $is_end = preg_match($end_pattern, $line);
+        $is_end = @preg_match($end_pattern, $line);
 
         // If a line contains only "%%%", it will match both the start and
         // end patterns, but it only counts as a block start.
         if ($is_end && ($cursor === $block_start)) {
-          $is_trivial = preg_match($trivial_pattern, $line);
+          $is_trivial = @preg_match($trivial_pattern, $line);
           if ($is_trivial) {
             $is_end = false;
           }
@@ -75,7 +75,7 @@
       }
 
       if ($block_start === null) {
-        if (strlen(trim($line))) {
+        if (@strlen(trim($line))) {
           break;
         }
         $found_empty = true;
diff --git a/src/infrastructure/markup/blockrule/PhutilRemarkupNoteBlockRule.php b/src/infrastructure/markup/blockrule/PhutilRemarkupNoteBlockRule.php
--- a/src/infrastructure/markup/blockrule/PhutilRemarkupNoteBlockRule.php
+++ b/src/infrastructure/markup/blockrule/PhutilRemarkupNoteBlockRule.php
@@ -5,7 +5,7 @@
   public function getMatchingLineCount(array $lines, $cursor) {
     $num_lines = 0;
 
-    if (preg_match($this->getRegEx(), $lines[$cursor])) {
+    if (@preg_match($this->getRegEx(), $lines[$cursor])) {
       $num_lines++;
       $cursor++;
 
@@ -24,7 +24,7 @@
 
   public function markupText($text, $children) {
     $matches = array();
-    preg_match($this->getRegEx(), $text, $matches);
+    @preg_match($this->getRegEx(), $text, $matches);
 
     if (idx($matches, 'showword')) {
       $word = $matches['showword'];
@@ -37,10 +37,10 @@
     $class_suffix = phutil_utf8_strtolower($word);
 
     // This is the "(IMPORTANT)" or "NOTE:" part.
-    $word_part = rtrim(substr($text, 0, strlen($matches[0])));
+    $word_part = rtrim(@substr($text, 0, @strlen($matches[0])));
 
     // This is the actual text.
-    $text_part = substr($text, strlen($matches[0]));
+    $text_part = @substr($text, @strlen($matches[0]));
     $text_part = $this->applyRules(rtrim($text_part));
 
     $text_mode = $this->getEngine()->isTextMode();
diff --git a/src/infrastructure/markup/blockrule/PhutilRemarkupQuotedBlockRule.php b/src/infrastructure/markup/blockrule/PhutilRemarkupQuotedBlockRule.php
--- a/src/infrastructure/markup/blockrule/PhutilRemarkupQuotedBlockRule.php
+++ b/src/infrastructure/markup/blockrule/PhutilRemarkupQuotedBlockRule.php
@@ -10,7 +10,7 @@
   final protected function normalizeQuotedBody($text) {
     $text = phutil_split_lines($text, true);
     foreach ($text as $key => $line) {
-      $text[$key] = substr($line, 1);
+      $text[$key] = @substr($line, 1);
     }
 
     // If every line in the block is empty or begins with at least one leading
@@ -21,7 +21,7 @@
 
     $strip_space = true;
     foreach ($text as $key => $line) {
-      $len = strlen($line);
+      $len = @strlen($line);
 
       if (!$len) {
         // We'll still strip spaces if there are some completely empty
@@ -49,7 +49,7 @@
 
     if ($strip_space) {
       foreach ($text as $key => $line) {
-        $len = strlen($line);
+        $len = @strlen($line);
         if (!$len) {
           continue;
         }
@@ -58,13 +58,13 @@
           continue;
         }
 
-        $text[$key] = substr($line, 1);
+        $text[$key] = @substr($line, 1);
       }
     }
 
     // Strip leading empty lines.
     foreach ($text as $key => $line) {
-      if (!strlen(trim($line))) {
+      if (!@strlen(trim($line))) {
         unset($text[$key]);
       } else {
         break;
diff --git a/src/infrastructure/markup/blockrule/PhutilRemarkupQuotesBlockRule.php b/src/infrastructure/markup/blockrule/PhutilRemarkupQuotesBlockRule.php
--- a/src/infrastructure/markup/blockrule/PhutilRemarkupQuotesBlockRule.php
+++ b/src/infrastructure/markup/blockrule/PhutilRemarkupQuotesBlockRule.php
@@ -6,10 +6,10 @@
   public function getMatchingLineCount(array $lines, $cursor) {
     $pos = $cursor;
 
-    if (preg_match('/^>/', $lines[$pos])) {
+    if (@preg_match('/^>/', $lines[$pos])) {
       do {
         ++$pos;
-      } while (isset($lines[$pos]) && preg_match('/^>/', $lines[$pos]));
+      } while (isset($lines[$pos]) && @preg_match('/^>/', $lines[$pos]));
     }
 
     return ($pos - $cursor);
diff --git a/src/infrastructure/markup/blockrule/PhutilRemarkupReplyBlockRule.php b/src/infrastructure/markup/blockrule/PhutilRemarkupReplyBlockRule.php
--- a/src/infrastructure/markup/blockrule/PhutilRemarkupReplyBlockRule.php
+++ b/src/infrastructure/markup/blockrule/PhutilRemarkupReplyBlockRule.php
@@ -10,10 +10,10 @@
   public function getMatchingLineCount(array $lines, $cursor) {
     $pos = $cursor;
 
-    if (preg_match('/^>>!/', $lines[$pos])) {
+    if (@preg_match('/^>>!/', $lines[$pos])) {
       do {
         ++$pos;
-      } while (isset($lines[$pos]) && preg_match('/^>/', $lines[$pos]));
+      } while (isset($lines[$pos]) && @preg_match('/^>/', $lines[$pos]));
     }
 
     return ($pos - $cursor);
@@ -22,7 +22,7 @@
   public function extractChildText($text) {
     $text = phutil_split_lines($text, true);
 
-    $head = substr(reset($text), 3);
+    $head = @substr(reset($text), 3);
 
     $body = array_slice($text, 1);
     $body = implode('', $body);
diff --git a/src/infrastructure/markup/blockrule/PhutilRemarkupSimpleTableBlockRule.php b/src/infrastructure/markup/blockrule/PhutilRemarkupSimpleTableBlockRule.php
--- a/src/infrastructure/markup/blockrule/PhutilRemarkupSimpleTableBlockRule.php
+++ b/src/infrastructure/markup/blockrule/PhutilRemarkupSimpleTableBlockRule.php
@@ -5,7 +5,7 @@
   public function getMatchingLineCount(array $lines, $cursor) {
     $num_lines = 0;
     while (isset($lines[$cursor])) {
-      if (preg_match('/^(\s*\|.*+\n?)+$/', $lines[$cursor])) {
+      if (@preg_match('/^(\s*\|.*+\n?)+$/', $lines[$cursor])) {
         $num_lines++;
         $cursor++;
       } else {
@@ -20,7 +20,7 @@
     $matches = array();
 
     $rows = array();
-    foreach (explode("\n", $text) as $line) {
+    foreach (@explode("\n", $text) as $line) {
       // Ignore ending delimiters.
       $line = rtrim($line, '|');
 
@@ -54,8 +54,8 @@
 
         // If it has only empty cells, it's an empty row.
 
-        if (strlen($cell)) {
-          if (preg_match('/^--+\z/', $cell)) {
+        if (@strlen($cell)) {
+          if (@preg_match('/^--+\z/', $cell)) {
             $any_header = true;
           } else {
             $any_content = true;
diff --git a/src/infrastructure/markup/blockrule/PhutilRemarkupTableBlockRule.php b/src/infrastructure/markup/blockrule/PhutilRemarkupTableBlockRule.php
--- a/src/infrastructure/markup/blockrule/PhutilRemarkupTableBlockRule.php
+++ b/src/infrastructure/markup/blockrule/PhutilRemarkupTableBlockRule.php
@@ -5,13 +5,13 @@
   public function getMatchingLineCount(array $lines, $cursor) {
     $num_lines = 0;
 
-    if (preg_match('/^\s*<table>/i', $lines[$cursor])) {
+    if (@preg_match('/^\s*<table>/i', $lines[$cursor])) {
       $num_lines++;
       $cursor++;
 
       while (isset($lines[$cursor])) {
         $num_lines++;
-        if (preg_match('@</table>\s*$@i', $lines[$cursor])) {
+        if (@preg_match('@</table>\s*$@i', $lines[$cursor])) {
           break;
         }
         $cursor++;
@@ -33,7 +33,7 @@
       if ($node->isContentNode()) {
         $content = $node->getContent();
 
-        if (!strlen(trim($content))) {
+        if (!@strlen(trim($content))) {
           // Ignore whitespace.
           continue;
         }
@@ -75,7 +75,7 @@
         $content = $node->getContent();
 
         // If this is whitespace, ignore it.
-        if (!strlen(trim($content))) {
+        if (!@strlen(trim($content))) {
           continue;
         }
 
@@ -114,7 +114,7 @@
         if ($cell->isContentNode()) {
           $content = $node->getContent();
 
-          if (!strlen(trim($content))) {
+          if (!@strlen(trim($content))) {
             continue;
           }
 
diff --git a/src/infrastructure/markup/interpreter/PhabricatorRemarkupCowsayBlockInterpreter.php b/src/infrastructure/markup/interpreter/PhabricatorRemarkupCowsayBlockInterpreter.php
--- a/src/infrastructure/markup/interpreter/PhabricatorRemarkupCowsayBlockInterpreter.php
+++ b/src/infrastructure/markup/interpreter/PhabricatorRemarkupCowsayBlockInterpreter.php
@@ -59,7 +59,7 @@
     foreach ($directories as $directory) {
       foreach (Filesystem::listDirectory($directory, false) as $cow_file) {
         $matches = null;
-        if (!preg_match('/^(.*)\.cow\z/', $cow_file, $matches)) {
+        if (!@preg_match('/^(.*)\.cow\z/', $cow_file, $matches)) {
           continue;
         }
         $cow_name = $matches[1];
diff --git a/src/infrastructure/markup/interpreter/PhabricatorRemarkupFigletBlockInterpreter.php b/src/infrastructure/markup/interpreter/PhabricatorRemarkupFigletBlockInterpreter.php
--- a/src/infrastructure/markup/interpreter/PhabricatorRemarkupFigletBlockInterpreter.php
+++ b/src/infrastructure/markup/interpreter/PhabricatorRemarkupFigletBlockInterpreter.php
@@ -57,7 +57,7 @@
     $map = array();
     foreach ($dirs as $dir) {
       foreach (Filesystem::listDirectory($dir, false) as $file) {
-        if (preg_match('/\.flf\z/', $file)) {
+        if (@preg_match('/\.flf\z/', $file)) {
           $name = phutil_utf8_strtolower($file);
           $name = preg_replace('/\.flf\z/', '', $name);
           $map[$name] = $dir.$file;
diff --git a/src/infrastructure/markup/markuprule/PhutilRemarkupDocumentLinkRule.php b/src/infrastructure/markup/markuprule/PhutilRemarkupDocumentLinkRule.php
--- a/src/infrastructure/markup/markuprule/PhutilRemarkupDocumentLinkRule.php
+++ b/src/infrastructure/markup/markuprule/PhutilRemarkupDocumentLinkRule.php
@@ -60,14 +60,14 @@
       // If present, strip off "mailto:" or "tel:".
       $link = preg_replace('/^(?:mailto|tel):/', '', $link);
 
-      if (!strlen($name)) {
+      if (!@strlen($name)) {
         return $link;
       }
 
       return $name.' <'.$link.'>';
     }
 
-    if (!strlen($name)) {
+    if (!@strlen($name)) {
       $name = $link;
       $name = preg_replace('/^(?:mailto|tel):/', '', $name);
     }
@@ -102,7 +102,7 @@
   public function markupAlternateLink(array $matches) {
     $uri = trim($matches[2]);
 
-    if (!strlen($uri)) {
+    if (!@strlen($uri)) {
       return $matches[0];
     }
 
@@ -118,8 +118,8 @@
       return $matches[0];
     }
 
-    if (strpos($uri, '/') === false &&
-        strpos($uri, '@') === false &&
+    if (@strpos($uri, '/') === false &&
+        @strpos($uri, '@') === false &&
         strncmp($uri, 'tel:', 4)) {
       return $matches[0];
     }
@@ -146,7 +146,7 @@
 
     // If whatever is being linked to begins with "/" or "#", or has "://",
     // or is "mailto:" or "tel:", treat it as a URI instead of a wiki page.
-    $is_uri = preg_match('@(^/)|(://)|(^#)|(^(?:mailto|tel):)@', $uri);
+    $is_uri = @preg_match('@(^/)|(://)|(^#)|(^(?:mailto|tel):)@', $uri);
 
     if ($is_uri && strncmp('/', $uri, 1) && strncmp('#', $uri, 1)) {
       $protocols = $this->getEngine()->getConfig(
diff --git a/src/infrastructure/markup/markuprule/PhutilRemarkupEscapeRemarkupRule.php b/src/infrastructure/markup/markuprule/PhutilRemarkupEscapeRemarkupRule.php
--- a/src/infrastructure/markup/markuprule/PhutilRemarkupEscapeRemarkupRule.php
+++ b/src/infrastructure/markup/markuprule/PhutilRemarkupEscapeRemarkupRule.php
@@ -7,7 +7,7 @@
   }
 
   public function apply($text) {
-    if (strpos($text, "\1") === false) {
+    if (@strpos($text, "\1") === false) {
       return $text;
     }
 
diff --git a/src/infrastructure/markup/markuprule/PhutilRemarkupHighlightRule.php b/src/infrastructure/markup/markuprule/PhutilRemarkupHighlightRule.php
--- a/src/infrastructure/markup/markuprule/PhutilRemarkupHighlightRule.php
+++ b/src/infrastructure/markup/markuprule/PhutilRemarkupHighlightRule.php
@@ -19,12 +19,12 @@
 
   protected function applyCallback(array $matches) {
     // Remove the two exclamation points that represent syntax.
-    $excitement = substr($matches[2], 2);
+    $excitement = @substr($matches[2], 2);
 
     // If the internal content consists of ONLY exclamation points, leave it
     // untouched so "!!!!!" is five exclamation points instead of one
     // highlighted exclamation point.
-    if (preg_match('/^!+\z/', $matches[1])) {
+    if (@preg_match('/^!+\z/', $matches[1])) {
       return $matches[0];
     }
 
diff --git a/src/infrastructure/markup/markuprule/PhutilRemarkupHyperlinkRule.php b/src/infrastructure/markup/markuprule/PhutilRemarkupHyperlinkRule.php
--- a/src/infrastructure/markup/markuprule/PhutilRemarkupHyperlinkRule.php
+++ b/src/infrastructure/markup/markuprule/PhutilRemarkupHyperlinkRule.php
@@ -146,9 +146,9 @@
     $match = $matches[0];
     $tail = null;
     $trailing = null;
-    if (preg_match('/[;,.:!?]+$/', $match, $trailing)) {
+    if (@preg_match('/[;,.:!?]+$/', $match, $trailing)) {
       $tail = $trailing[0];
-      $match = substr($match, 0, -strlen($tail));
+      $match = @substr($match, 0, -@strlen($tail));
     }
 
     // If there's a closing paren at the end but no balancing open paren in
@@ -161,9 +161,9 @@
     //
     // We could apply a craftier heuristic here which tries to actually balance
     // the parens, but this is probably sufficient.
-    if (preg_match('/\\)$/', $match) && !preg_match('/\\(/', $match)) {
+    if (@preg_match('/\\)$/', $match) && !@preg_match('/\\(/', $match)) {
       $tail = ')'.$tail;
-      $match = substr($match, 0, -1);
+      $match = @substr($match, 0, -1);
     }
 
     try {
diff --git a/src/infrastructure/markup/markuprule/PhutilRemarkupRule.php b/src/infrastructure/markup/markuprule/PhutilRemarkupRule.php
--- a/src/infrastructure/markup/markuprule/PhutilRemarkupRule.php
+++ b/src/infrastructure/markup/markuprule/PhutilRemarkupRule.php
@@ -84,7 +84,7 @@
    */
   protected function assertFlatText($text) {
     $text = (string)hsprintf('%s', phutil_safe_html($text));
-    $rich = (strpos($text, PhutilRemarkupBlockStorage::MAGIC_BYTE) !== false);
+    $rich = (@strpos($text, PhutilRemarkupBlockStorage::MAGIC_BYTE) !== false);
     if ($rich) {
       throw new Exception(
         pht(
@@ -103,7 +103,7 @@
    */
   protected function isFlatText($text) {
     $text = (string)hsprintf('%s', phutil_safe_html($text));
-    return (strpos($text, PhutilRemarkupBlockStorage::MAGIC_BYTE) === false);
+    return (@strpos($text, PhutilRemarkupBlockStorage::MAGIC_BYTE) === false);
   }
 
 }
diff --git a/src/infrastructure/markup/remarkup/PhutilRemarkupEngine.php b/src/infrastructure/markup/remarkup/PhutilRemarkupEngine.php
--- a/src/infrastructure/markup/remarkup/PhutilRemarkupEngine.php
+++ b/src/infrastructure/markup/remarkup/PhutilRemarkupEngine.php
@@ -318,7 +318,7 @@
 
     $tail = $text[$current_block['start'] - 1];
     $head = $text[$current_block['start']];
-    if (strlen(trim($tail)) && strlen(trim($head))) {
+    if (@strlen(trim($tail)) && @strlen(trim($head))) {
       return true;
     }
 
@@ -327,7 +327,7 @@
 
   private static function isEmptyBlock($text, $start, $num_lines) {
     for ($cursor = $start; $cursor < $start + $num_lines; $cursor++) {
-      if (strlen(trim($text[$cursor]))) {
+      if (@strlen(trim($text[$cursor]))) {
         return false;
       }
     }
diff --git a/src/infrastructure/markup/remarkup/__tests__/PhutilRemarkupEngineTestCase.php b/src/infrastructure/markup/remarkup/__tests__/PhutilRemarkupEngineTestCase.php
--- a/src/infrastructure/markup/remarkup/__tests__/PhutilRemarkupEngineTestCase.php
+++ b/src/infrastructure/markup/remarkup/__tests__/PhutilRemarkupEngineTestCase.php
@@ -16,7 +16,7 @@
     $contents = Filesystem::readFile($markup_file);
     $file = basename($markup_file);
 
-    $parts = explode("\n~~~~~~~~~~\n", $contents);
+    $parts = @explode("\n~~~~~~~~~~\n", $contents);
     $this->assertEqual(3, count($parts), $markup_file);
 
     list($input_remarkup, $expected_output, $expected_text) = $parts;
diff --git a/src/infrastructure/markup/render.php b/src/infrastructure/markup/render.php
--- a/src/infrastructure/markup/render.php
+++ b/src/infrastructure/markup/render.php
@@ -33,7 +33,7 @@
       // application should ever use them, and they are a potent attack vector.
 
       // This function is deep in the core and performance sensitive, so we're
-      // doing a cheap version of this test first to avoid calling preg_match()
+      // doing a cheap version of this test first to avoid calling @preg_match()
       // on URIs which begin with '/' or `#`. These cover essentially all URIs
       // in Phabricator.
       if (($href[0] !== '/') && ($href[0] !== '#')) {
@@ -43,7 +43,7 @@
         // section of the string.
 
         $normalized_href = preg_replace('([^a-z0-9/:]+)i', '', $href);
-        if (preg_match('/^javascript:/i', $normalized_href)) {
+        if (@preg_match('/^javascript:/i', $normalized_href)) {
           throw new Exception(
             pht(
               "Attempting to render a tag with an '%s' attribute that begins ".
@@ -137,7 +137,7 @@
     return $result;
   }
 
-  return htmlspecialchars($string, ENT_QUOTES, 'UTF-8');
+  return @htmlspecialchars($string, ENT_QUOTES, 'UTF-8');
 }
 
 function phutil_escape_html_newlines($string) {
diff --git a/src/infrastructure/markup/rule/PhabricatorKeyboardRemarkupRule.php b/src/infrastructure/markup/rule/PhabricatorKeyboardRemarkupRule.php
--- a/src/infrastructure/markup/rule/PhabricatorKeyboardRemarkupRule.php
+++ b/src/infrastructure/markup/rule/PhabricatorKeyboardRemarkupRule.php
@@ -18,11 +18,11 @@
       return $matches[0];
     }
 
-    $keys = explode(' ', $matches[1]);
+    $keys = @explode(' ', $matches[1]);
     foreach ($keys as $k => $v) {
       $v = trim($v, " \n");
       $v = preg_replace('/\\\\(.)/', '\\1', $v);
-      if (!strlen($v)) {
+      if (!@strlen($v)) {
         unset($keys[$k]);
         continue;
       }
diff --git a/src/infrastructure/markup/rule/PhabricatorNavigationRemarkupRule.php b/src/infrastructure/markup/rule/PhabricatorNavigationRemarkupRule.php
--- a/src/infrastructure/markup/rule/PhabricatorNavigationRemarkupRule.php
+++ b/src/infrastructure/markup/rule/PhabricatorNavigationRemarkupRule.php
@@ -19,7 +19,7 @@
     }
 
     $elements = ltrim($matches[1], ", \n");
-    $elements = explode('>', $elements);
+    $elements = @explode('>', $elements);
 
     $defaults = array(
       'name' => null,
@@ -31,7 +31,7 @@
     $sequence = array();
     $parser = new PhutilSimpleOptions();
     foreach ($elements as $element) {
-      if (strpos($element, '=') === false) {
+      if (@strpos($element, '=') === false) {
         $sequence[] = array(
           'name' => trim($element),
         ) + $defaults;
diff --git a/src/infrastructure/markup/rule/PhabricatorObjectRemarkupRule.php b/src/infrastructure/markup/rule/PhabricatorObjectRemarkupRule.php
--- a/src/infrastructure/markup/rule/PhabricatorObjectRemarkupRule.php
+++ b/src/infrastructure/markup/rule/PhabricatorObjectRemarkupRule.php
@@ -17,7 +17,7 @@
 
   protected function getObjectNamePrefixBeginsWithWordCharacter() {
     $prefix = $this->getObjectNamePrefix();
-    return preg_match('/^\w/', $prefix);
+    return @preg_match('/^\w/', $prefix);
   }
 
   protected function getObjectIDPattern() {
@@ -335,7 +335,7 @@
 
     $regex = trim(
       PhabricatorEnv::getEnvConfig('remarkup.ignored-object-names'));
-    if ($regex && preg_match($regex, $params['original'])) {
+    if ($regex && @preg_match($regex, $params['original'])) {
       return $params['original'];
     }
 
diff --git a/src/infrastructure/markup/rule/PhabricatorYoutubeRemarkupRule.php b/src/infrastructure/markup/rule/PhabricatorYoutubeRemarkupRule.php
--- a/src/infrastructure/markup/rule/PhabricatorYoutubeRemarkupRule.php
+++ b/src/infrastructure/markup/rule/PhabricatorYoutubeRemarkupRule.php
@@ -14,7 +14,7 @@
     }
 
     $domain = $uri->getDomain();
-    if (!preg_match('/(^|\.)youtube\.com\z/', $domain)) {
+    if (!@preg_match('/(^|\.)youtube\.com\z/', $domain)) {
       return $text;
     }
 
diff --git a/src/infrastructure/markup/syntax/engine/PhutilDefaultSyntaxHighlighterEngine.php b/src/infrastructure/markup/syntax/engine/PhutilDefaultSyntaxHighlighterEngine.php
--- a/src/infrastructure/markup/syntax/engine/PhutilDefaultSyntaxHighlighterEngine.php
+++ b/src/infrastructure/markup/syntax/engine/PhutilDefaultSyntaxHighlighterEngine.php
@@ -26,7 +26,7 @@
     foreach ($maps as $map) {
       foreach ($map as $regexp => $lang) {
         $matches = null;
-        if (preg_match($regexp, $filename, $matches)) {
+        if (@preg_match($regexp, $filename, $matches)) {
           if (is_numeric($lang)) {
             return idx($matches, $lang);
           } else {
diff --git a/src/infrastructure/markup/syntax/highlighter/PhutilConsoleSyntaxHighlighter.php b/src/infrastructure/markup/syntax/highlighter/PhutilConsoleSyntaxHighlighter.php
--- a/src/infrastructure/markup/syntax/highlighter/PhutilConsoleSyntaxHighlighter.php
+++ b/src/infrastructure/markup/syntax/highlighter/PhutilConsoleSyntaxHighlighter.php
@@ -15,7 +15,7 @@
 
   public function getHighlightFuture($source) {
     $in_command = false;
-    $lines = explode("\n", $source);
+    $lines = @explode("\n", $source);
     foreach ($lines as $key => $line) {
       $matches = null;
 
@@ -30,7 +30,7 @@
         ($in_command ? '()(.*?)' : '^(\S+[\\\\/] )?([$] .*?)').
         '(#.*|\\\\)?$@';
 
-      if (preg_match($pattern, $line, $matches)) {
+      if (@preg_match($pattern, $line, $matches)) {
         $lines[$key] = hsprintf(
           '%s<span class="gp">%s</span>%s',
           $matches[1],
diff --git a/src/infrastructure/markup/syntax/highlighter/PhutilDivinerSyntaxHighlighter.php b/src/infrastructure/markup/syntax/highlighter/PhutilDivinerSyntaxHighlighter.php
--- a/src/infrastructure/markup/syntax/highlighter/PhutilDivinerSyntaxHighlighter.php
+++ b/src/infrastructure/markup/syntax/highlighter/PhutilDivinerSyntaxHighlighter.php
@@ -20,9 +20,9 @@
     // This highlighter isn't perfect but tries to do an okay job at getting
     // some of the basics at least. There's lots of room for improvement.
 
-    $blocks = explode("\n\n", $source);
+    $blocks = @explode("\n\n", $source);
     foreach ($blocks as $key => $block) {
-      if (preg_match('/^[^ ](?! )/m', $block)) {
+      if (@preg_match('/^[^ ](?! )/m', $block)) {
         $blocks[$key] = $this->highlightBlock($block);
       }
     }
@@ -68,7 +68,7 @@
     // NOTE: The goal here is to make sure a <span> never crosses a newline.
 
     $content = $matches[0];
-    $content = explode("\n", $content);
+    $content = @explode("\n", $content);
     foreach ($content as $key => $line) {
       $content[$key] =
         '<span class="'.$this->replaceClass.'">'.
diff --git a/src/infrastructure/markup/syntax/highlighter/PhutilLexerSyntaxHighlighter.php b/src/infrastructure/markup/syntax/highlighter/PhutilLexerSyntaxHighlighter.php
--- a/src/infrastructure/markup/syntax/highlighter/PhutilLexerSyntaxHighlighter.php
+++ b/src/infrastructure/markup/syntax/highlighter/PhutilLexerSyntaxHighlighter.php
@@ -15,7 +15,7 @@
     $lang = idx($this->config, 'language');
 
     if ($lang == 'php') {
-      if (strpos($source, '<?') === false) {
+      if (@strpos($source, '<?') === false) {
         $state = 'php';
       }
     }
@@ -37,13 +37,13 @@
           break;
       }
 
-      if (strpos($value, "\n") !== false) {
-        $value = explode("\n", $value);
+      if (@strpos($value, "\n") !== false) {
+        $value = @explode("\n", $value);
       } else {
         $value = array($value);
       }
       foreach ($value as $part) {
-        if (strlen($part)) {
+        if (@strlen($part)) {
           if ($type) {
             $result[] = phutil_tag(
               'span',
diff --git a/src/infrastructure/markup/syntax/highlighter/PhutilPygmentsSyntaxHighlighter.php b/src/infrastructure/markup/syntax/highlighter/PhutilPygmentsSyntaxHighlighter.php
--- a/src/infrastructure/markup/syntax/highlighter/PhutilPygmentsSyntaxHighlighter.php
+++ b/src/infrastructure/markup/syntax/highlighter/PhutilPygmentsSyntaxHighlighter.php
@@ -12,7 +12,7 @@
   public function getHighlightFuture($source) {
     $language = idx($this->config, 'language');
 
-    if (preg_match('/\r(?!\n)/', $source)) {
+    if (@preg_match('/\r(?!\n)/', $source)) {
       // TODO: Pygments converts "\r" newlines into "\n" newlines, so we can't
       // use it on files with "\r" newlines. If we have "\r" not followed by
       // "\n" in the file, skip highlighting.
@@ -31,7 +31,7 @@
         $language);
 
       $scrub = false;
-      if ($language == 'php' && strpos($source, '<?') === false) {
+      if ($language == 'php' && @strpos($source, '<?') === false) {
         $source = "<?php\n".$source;
         $scrub = true;
       }
diff --git a/src/infrastructure/markup/syntax/highlighter/PhutilXHPASTSyntaxHighlighter.php b/src/infrastructure/markup/syntax/highlighter/PhutilXHPASTSyntaxHighlighter.php
--- a/src/infrastructure/markup/syntax/highlighter/PhutilXHPASTSyntaxHighlighter.php
+++ b/src/infrastructure/markup/syntax/highlighter/PhutilXHPASTSyntaxHighlighter.php
@@ -4,7 +4,7 @@
 
   public function getHighlightFuture($source) {
     $scrub = false;
-    if (strpos($source, '<?') === false) {
+    if (@strpos($source, '<?') === false) {
       $source = "<?php\n".$source;
       $scrub = true;
     }
diff --git a/src/infrastructure/markup/syntax/highlighter/__tests__/PhutilJSONFragmentLexerHighlighterTestCase.php b/src/infrastructure/markup/syntax/highlighter/__tests__/PhutilJSONFragmentLexerHighlighterTestCase.php
--- a/src/infrastructure/markup/syntax/highlighter/__tests__/PhutilJSONFragmentLexerHighlighterTestCase.php
+++ b/src/infrastructure/markup/syntax/highlighter/__tests__/PhutilJSONFragmentLexerHighlighterTestCase.php
@@ -9,7 +9,7 @@
 
     $path = dirname(__FILE__).'/data/jsonfragment/';
     foreach (Filesystem::listDirectory($path, $include_hidden = false) as $f) {
-      if (preg_match('/.test$/', $f)) {
+      if (@preg_match('/.test$/', $f)) {
         $expect = preg_replace('/.test$/', '.expect', $f);
         $source = Filesystem::readFile($path.'/'.$f);
 
diff --git a/src/infrastructure/markup/syntax/highlighter/__tests__/PhutilPHPFragmentLexerHighlighterTestCase.php b/src/infrastructure/markup/syntax/highlighter/__tests__/PhutilPHPFragmentLexerHighlighterTestCase.php
--- a/src/infrastructure/markup/syntax/highlighter/__tests__/PhutilPHPFragmentLexerHighlighterTestCase.php
+++ b/src/infrastructure/markup/syntax/highlighter/__tests__/PhutilPHPFragmentLexerHighlighterTestCase.php
@@ -10,7 +10,7 @@
 
     $path = dirname(__FILE__).'/phpfragment/';
     foreach (Filesystem::listDirectory($path, $include_hidden = false) as $f) {
-      if (preg_match('/.test$/', $f)) {
+      if (@preg_match('/.test$/', $f)) {
         $expect = preg_replace('/.test$/', '.expect', $f);
         $source = Filesystem::readFile($path.'/'.$f);
 
diff --git a/src/infrastructure/markup/syntax/highlighter/pygments/PhutilDefaultSyntaxHighlighterEnginePygmentsFuture.php b/src/infrastructure/markup/syntax/highlighter/pygments/PhutilDefaultSyntaxHighlighterEnginePygmentsFuture.php
--- a/src/infrastructure/markup/syntax/highlighter/pygments/PhutilDefaultSyntaxHighlighterEnginePygmentsFuture.php
+++ b/src/infrastructure/markup/syntax/highlighter/pygments/PhutilDefaultSyntaxHighlighterEnginePygmentsFuture.php
@@ -15,7 +15,7 @@
   protected function didReceiveResult($result) {
     list($err, $stdout, $stderr) = $result;
 
-    if (!$err && strlen($stdout)) {
+    if (!$err && @strlen($stdout)) {
       // Strip off fluff Pygments adds.
       $stdout = preg_replace(
         '@^<div class="highlight"><pre>(.*)</pre></div>\s*$@s',
diff --git a/src/infrastructure/markup/syntax/highlighter/xhpast/PhutilXHPASTSyntaxHighlighterFuture.php b/src/infrastructure/markup/syntax/highlighter/xhpast/PhutilXHPASTSyntaxHighlighterFuture.php
--- a/src/infrastructure/markup/syntax/highlighter/xhpast/PhutilXHPASTSyntaxHighlighterFuture.php
+++ b/src/infrastructure/markup/syntax/highlighter/xhpast/PhutilXHPASTSyntaxHighlighterFuture.php
@@ -70,14 +70,14 @@
       unset($tokens[0]);
 
       $value = $tokens[1]->getValue();
-      if ((strlen($value) < 1) || ($value[0] != "\n")) {
+      if ((@strlen($value) < 1) || ($value[0] != "\n")) {
         throw new Exception(
           pht(
             'Expected "\\n" at beginning of T_WHITESPACE token at head of '.
             'tokens for highlighting parse of PHP snippet.'));
       }
 
-      $value = substr($value, 1);
+      $value = @substr($value, 1);
       $tokens[1]->overwriteValue($value);
     }
 
@@ -128,7 +128,7 @@
               'false' => true,
               'null' => true,
             );
-            if (isset($magic[strtolower($value)])) {
+            if (isset($magic[@strtolower($value)])) {
               $class = 'k';
               break;
             }
diff --git a/src/infrastructure/parser/PhutilPygmentizeParser.php b/src/infrastructure/parser/PhutilPygmentizeParser.php
--- a/src/infrastructure/parser/PhutilPygmentizeParser.php
+++ b/src/infrastructure/parser/PhutilPygmentizeParser.php
@@ -19,13 +19,13 @@
 
   public function parse($block) {
     $class_look = 'class="';
-    $class_len = strlen($class_look);
+    $class_len = @strlen($class_look);
 
     $class_start = null;
 
     $map = $this->map;
 
-    $len = strlen($block);
+    $len = @strlen($block);
     $out = '';
     $mode = 'text';
     for ($ii = 0; $ii < $len; $ii++) {
@@ -61,7 +61,7 @@
           // We're inside a `class="..."` tag, and looking for the ending quote
           // so we can replace it.
           if ($c == '"') {
-            $class = substr($block, $class_start, $ii - $class_start);
+            $class = @substr($block, $class_start, $ii - $class_start);
 
             // If this class is present in the map, rewrite it into an inline
             // style attribute.
diff --git a/src/infrastructure/query/PhabricatorQuery.php b/src/infrastructure/query/PhabricatorQuery.php
--- a/src/infrastructure/query/PhabricatorQuery.php
+++ b/src/infrastructure/query/PhabricatorQuery.php
@@ -87,7 +87,7 @@
         foreach ($this->flattenSubclause($part) as $subpart) {
           $result[] = $subpart;
         }
-      } else if (strlen($part)) {
+      } else if (@strlen($part)) {
         $result[] = $part;
       }
     }
diff --git a/src/infrastructure/query/order/PhabricatorQueryOrderItem.php b/src/infrastructure/query/order/PhabricatorQueryOrderItem.php
--- a/src/infrastructure/query/order/PhabricatorQueryOrderItem.php
+++ b/src/infrastructure/query/order/PhabricatorQueryOrderItem.php
@@ -30,7 +30,7 @@
     $is_reversed = false;
     if (!strncmp($scalar, '-', 1)) {
       $is_reversed = true;
-      $scalar = substr($scalar, 1);
+      $scalar = @substr($scalar, 1);
     }
 
     $item = new PhabricatorQueryOrderItem();
diff --git a/src/infrastructure/query/policy/PhabricatorCursorPagedPolicyAwareQuery.php b/src/infrastructure/query/policy/PhabricatorCursorPagedPolicyAwareQuery.php
--- a/src/infrastructure/query/policy/PhabricatorCursorPagedPolicyAwareQuery.php
+++ b/src/infrastructure/query/policy/PhabricatorCursorPagedPolicyAwareQuery.php
@@ -369,7 +369,7 @@
 
     $this->setLimit($limit + 1);
 
-    if (strlen($pager->getAfterID())) {
+    if (@strlen($pager->getAfterID())) {
       $this->setExternalCursorString($pager->getAfterID());
     } else if ($pager->getBeforeID()) {
       $this->setExternalCursorString($pager->getBeforeID());
@@ -1738,7 +1738,7 @@
    */
   protected function isCustomFieldOrderKey($key) {
     $prefix = 'custom:';
-    return !strncmp($key, $prefix, strlen($prefix));
+    return !strncmp($key, $prefix, @strlen($prefix));
   }
 
 
@@ -2428,7 +2428,7 @@
     PhabricatorSearchNgrams $index,
     $value) {
 
-    if (strlen($value)) {
+    if (@strlen($value)) {
       $this->ngrams[] = array(
         'index' => $index,
         'value' => $value,
diff --git a/src/infrastructure/ssh/PhabricatorSSHPassthruCommand.php b/src/infrastructure/ssh/PhabricatorSSHPassthruCommand.php
--- a/src/infrastructure/ssh/PhabricatorSSHPassthruCommand.php
+++ b/src/infrastructure/ssh/PhabricatorSSHPassthruCommand.php
@@ -163,7 +163,7 @@
       }
 
       $out_message = $command_channel->read();
-      if (strlen($out_message)) {
+      if (@strlen($out_message)) {
         $out_message = $this->willReadData($out_message);
         if ($out_message !== null) {
           $io_channel->write($out_message);
@@ -201,7 +201,7 @@
 
   public function writeIORead($in_message) {
     $in_message = $this->willWriteData($in_message);
-    if (strlen($in_message)) {
+    if (@strlen($in_message)) {
       $this->commandChannel->write($in_message);
     }
   }
@@ -210,7 +210,7 @@
     if ($this->willWriteCallback) {
       return call_user_func($this->willWriteCallback, $this, $message);
     } else {
-      if (strlen($message)) {
+      if (@strlen($message)) {
         return $message;
       } else {
         return null;
@@ -222,7 +222,7 @@
     if ($this->willReadCallback) {
       return call_user_func($this->willReadCallback, $this, $message);
     } else {
-      if (strlen($message)) {
+      if (@strlen($message)) {
         return $message;
       } else {
         return null;
diff --git a/src/infrastructure/ssh/PhabricatorSSHWorkflow.php b/src/infrastructure/ssh/PhabricatorSSHWorkflow.php
--- a/src/infrastructure/ssh/PhabricatorSSHWorkflow.php
+++ b/src/infrastructure/ssh/PhabricatorSSHWorkflow.php
@@ -101,7 +101,7 @@
 
   public function getSSHRemoteAddress() {
     $ssh_client = getenv('SSH_CLIENT');
-    if (!strlen($ssh_client)) {
+    if (!@strlen($ssh_client)) {
       return null;
     }
 
@@ -109,7 +109,7 @@
     // also be proxied.
 
     // This has the format "<ip> <remote-port> <local-port>". Grab the IP.
-    $remote_address = head(explode(' ', $ssh_client));
+    $remote_address = head(@explode(' ', $ssh_client));
 
     try {
       $address = PhutilIPAddress::newAddress($remote_address);
diff --git a/src/infrastructure/storage/connection/AphrontIsolatedDatabaseConnection.php b/src/infrastructure/storage/connection/AphrontIsolatedDatabaseConnection.php
--- a/src/infrastructure/storage/connection/AphrontIsolatedDatabaseConnection.php
+++ b/src/infrastructure/storage/connection/AphrontIsolatedDatabaseConnection.php
@@ -90,7 +90,7 @@
     }
     $preg_keywords = implode('|', $preg_keywords);
 
-    if (!preg_match('/^[\s<>K]*('.$preg_keywords.')\s*/i', $raw_query)) {
+    if (!@preg_match('/^[\s<>K]*('.$preg_keywords.')\s*/i', $raw_query)) {
       throw new AphrontNotSupportedQueryException(
         pht(
           "Database isolation currently only supports some queries. You are ".
diff --git a/src/infrastructure/storage/connection/mysql/AphrontBaseMySQLDatabaseConnection.php b/src/infrastructure/storage/connection/mysql/AphrontBaseMySQLDatabaseConnection.php
--- a/src/infrastructure/storage/connection/mysql/AphrontBaseMySQLDatabaseConnection.php
+++ b/src/infrastructure/storage/connection/mysql/AphrontBaseMySQLDatabaseConnection.php
@@ -292,7 +292,7 @@
     // NOTE: The opening "(" allows queries in the form of:
     //
     //   (SELECT ...) UNION (SELECT ...)
-    $is_write = !preg_match('/^[(]*(SELECT|SHOW|EXPLAIN)\s/', $raw_query);
+    $is_write = !@preg_match('/^[(]*(SELECT|SHOW|EXPLAIN)\s/', $raw_query);
     if ($is_write) {
       if ($this->getReadOnly()) {
         throw new Exception(
diff --git a/src/infrastructure/storage/connection/mysql/AphrontMySQLDatabaseConnection.php b/src/infrastructure/storage/connection/mysql/AphrontMySQLDatabaseConnection.php
--- a/src/infrastructure/storage/connection/mysql/AphrontMySQLDatabaseConnection.php
+++ b/src/infrastructure/storage/connection/mysql/AphrontMySQLDatabaseConnection.php
@@ -167,7 +167,7 @@
       $host = $conn->getConfiguration('host');
       $port = 0;
       $match = null;
-      if (preg_match('/(.+):(.+)/', $host, $match)) {
+      if (@preg_match('/(.+):(.+)/', $host, $match)) {
         list(, $host, $port) = $match;
       }
 
diff --git a/src/infrastructure/storage/connection/mysql/AphrontMySQLiDatabaseConnection.php b/src/infrastructure/storage/connection/mysql/AphrontMySQLiDatabaseConnection.php
--- a/src/infrastructure/storage/connection/mysql/AphrontMySQLiDatabaseConnection.php
+++ b/src/infrastructure/storage/connection/mysql/AphrontMySQLiDatabaseConnection.php
@@ -92,7 +92,7 @@
     // "port" parameter.)
 
     if (!$ok) {
-      if (strlen($call_error)) {
+      if (@strlen($call_error)) {
         $message = pht(
           'mysqli->real_connect() failed: %s',
           $call_error);
@@ -173,7 +173,7 @@
     if (!$result) {
       $error_code = $this->getErrorCode($conn);
       if (!$error_code) {
-        if (strlen($err)) {
+        if (@strlen($err)) {
           $message = $err;
          } else {
           $message = pht(
diff --git a/src/infrastructure/storage/lisk/LiskDAO.php b/src/infrastructure/storage/lisk/LiskDAO.php
--- a/src/infrastructure/storage/lisk/LiskDAO.php
+++ b/src/infrastructure/storage/lisk/LiskDAO.php
@@ -405,9 +405,8 @@
   public function getConfigOption($option_name) {
     static $options = null;
 
-    if (!isset($options)) {
-      $options = $this->getConfiguration();
-    }
+    //get config every time to be sure it is correct
+    $options = $this->getConfiguration();
 
     return idx($options, $option_name);
   }
@@ -588,7 +587,7 @@
       // which may include extra explicit columns or joins.
 
       // This pathway is very hot on some pages, so we're inlining a cache
-      // and doing some microoptimization to avoid a strtolower() call for each
+      // and doing some microoptimization to avoid a @strtolower() call for each
       // assignment. The common path (assigning a valid property which we've
       // already seen) always incurs only one empty(). The second most common
       // path (assigning an invalid property which we've already seen) costs
@@ -743,26 +742,24 @@
    */
   protected function getAllLiskProperties() {
     static $properties = null;
-    if (!isset($properties)) {
-      $class = new ReflectionClass(get_class($this));
-      $properties = array();
-      foreach ($class->getProperties(ReflectionProperty::IS_PROTECTED) as $p) {
-        $properties[strtolower($p->getName())] = $p->getName();
-      }
+    $class = new ReflectionClass(get_class($this));
+    $properties = array();
+    foreach ($class->getProperties(ReflectionProperty::IS_PROTECTED) as $p) {
+      $properties[@strtolower($p->getName())] = $p->getName();
+    }
 
-      $id_key = $this->getIDKey();
-      if ($id_key != 'id') {
-        unset($properties['id']);
-      }
+    $id_key = $this->getIDKey();
+    if ($id_key != 'id') {
+      unset($properties['id']);
+    }
 
-      if (!$this->getConfigOption(self::CONFIG_TIMESTAMPS)) {
-        unset($properties['datecreated']);
-        unset($properties['datemodified']);
-      }
+    if (!$this->getConfigOption(self::CONFIG_TIMESTAMPS)) {
+      unset($properties['datecreated']);
+      unset($properties['datemodified']);
+    }
 
-      if ($id_key != 'phid' && !$this->getConfigOption(self::CONFIG_AUX_PHID)) {
-        unset($properties['phid']);
-      }
+    if ($id_key != 'phid' && !$this->getConfigOption(self::CONFIG_AUX_PHID)) {
+      unset($properties['phid']);
     }
     return $properties;
   }
@@ -782,9 +779,13 @@
       $properties = $this->getAllLiskProperties();
     }
 
-    $property = strtolower($property);
+    $property = @strtolower($property);
     if (empty($properties[$property])) {
-      return null;
+      //double check this to avoid false positives
+      $properties = $this->getAllLiskProperties();
+      if (empty($properties[$property])) {
+          return null;
+        }
     }
 
     return $properties[$property];
@@ -1612,12 +1613,12 @@
       if (isset($dispatch_map[$method])) {
         $property = $dispatch_map[$method];
       } else {
-        if (substr($method, 0, 3) !== 'get') {
+        if (@substr($method, 0, 3) !== 'get') {
           throw new Exception(pht("Unable to resolve method '%s'!", $method));
         }
-        $property = substr($method, 3);
+        $property = @substr($method, 3);
         if (!($property = $this->checkProperty($property))) {
-          throw new Exception(pht('Bad getter call: %s', $method));
+          throw new Exception(pht('\Bad getter call: %s', $method));
         }
         $dispatch_map[$method] = $property;
       }
@@ -1629,10 +1630,10 @@
       if (isset($dispatch_map[$method])) {
         $property = $dispatch_map[$method];
       } else {
-        if (substr($method, 0, 3) !== 'set') {
+        if (@substr($method, 0, 3) !== 'set') {
           throw new Exception(pht("Unable to resolve method '%s'!", $method));
         }
-        $property = substr($method, 3);
+        $property = @substr($method, 3);
         $property = $this->checkProperty($property);
         if (!$property) {
           throw new Exception(pht('Bad setter call: %s', $method));
@@ -1825,13 +1826,13 @@
       }
 
       // If the column is named `somethingPHID`, infer it is a PHID.
-      if (preg_match('/[a-z]PHID$/', $property)) {
+      if (@preg_match('/[a-z]PHID$/', $property)) {
         $map[$property] = 'phid';
         continue;
       }
 
       // If the column is named `somethingID`, infer it is an ID.
-      if (preg_match('/[a-z]ID$/', $property)) {
+      if (@preg_match('/[a-z]ID$/', $property)) {
         $map[$property] = 'id';
         continue;
       }
diff --git a/src/infrastructure/storage/lisk/PhabricatorDataNotAttachedException.php b/src/infrastructure/storage/lisk/PhabricatorDataNotAttachedException.php
--- a/src/infrastructure/storage/lisk/PhabricatorDataNotAttachedException.php
+++ b/src/infrastructure/storage/lisk/PhabricatorDataNotAttachedException.php
@@ -14,7 +14,7 @@
     $via = null;
     if (is_array($frame)) {
       $method = idx($frame, 'function');
-      if (preg_match('/^get[A-Z]/', $method)) {
+      if (@preg_match('/^get[A-Z]/', $method)) {
         $via = ' '.pht('(via %s)', "{$method}()");
       }
     }
diff --git a/src/infrastructure/storage/lisk/PhabricatorLiskDAO.php b/src/infrastructure/storage/lisk/PhabricatorLiskDAO.php
--- a/src/infrastructure/storage/lisk/PhabricatorLiskDAO.php
+++ b/src/infrastructure/storage/lisk/PhabricatorLiskDAO.php
@@ -39,10 +39,10 @@
    */
   public static function getStorageNamespace() {
     $namespace = end(self::$namespaceStack);
-    if (!strlen($namespace)) {
+    if (!@strlen($namespace)) {
       $namespace = self::getDefaultStorageNamespace();
     }
-    if (!strlen($namespace)) {
+    if (!@strlen($namespace)) {
       throw new Exception(pht('No storage namespace configured!'));
     }
     return $namespace;
@@ -183,18 +183,18 @@
    */
   public function getTableName() {
     $str = 'phabricator';
-    $len = strlen($str);
+    $len = @strlen($str);
 
-    $class = strtolower(get_class($this));
+    $class = @strtolower(get_class($this));
     if (!strncmp($class, $str, $len)) {
-      $class = substr($class, $len);
+      $class = @substr($class, $len);
     }
     $app = $this->getApplicationName();
-    if (!strncmp($class, $app, strlen($app))) {
-      $class = substr($class, strlen($app));
+    if (!strncmp($class, $app, @strlen($app))) {
+      $class = @substr($class, @strlen($app));
     }
 
-    if (strlen($class)) {
+    if (@strlen($class)) {
       return $app.'_'.$class;
     } else {
       return $app;
@@ -238,12 +238,12 @@
 
     $chunk = array();
     $len = 0;
-    $glue_len = strlen(', ');
+    $glue_len = @strlen(', ');
     foreach ($fragments as $fragment) {
       if ($fragment instanceof PhutilQueryString) {
-        $this_len = strlen($fragment->getUnmaskedString());
+        $this_len = @strlen($fragment->getUnmaskedString());
       } else {
-        $this_len = strlen($fragment);
+        $this_len = @strlen($fragment);
       }
 
       if ($chunk) {
@@ -295,7 +295,7 @@
     }
 
     if (function_exists('mb_detect_encoding')) {
-      if (strlen($encoding)) {
+      if (@strlen($encoding)) {
         $try_encodings = array(
           $encoding,
         );
diff --git a/src/infrastructure/storage/management/workflow/PhabricatorStorageManagementDumpWorkflow.php b/src/infrastructure/storage/management/workflow/PhabricatorStorageManagementDumpWorkflow.php
--- a/src/infrastructure/storage/management/workflow/PhabricatorStorageManagementDumpWorkflow.php
+++ b/src/infrastructure/storage/management/workflow/PhabricatorStorageManagementDumpWorkflow.php
@@ -183,7 +183,7 @@
 
     $password = $api->getPassword();
     if ($password) {
-      if (strlen($password->openEnvelope())) {
+      if (@strlen($password->openEnvelope())) {
         $has_password = true;
       }
     }
@@ -310,7 +310,7 @@
           list($stdout, $stderr) = $future->read();
           $future->discardBuffers();
 
-          if (strlen($stderr)) {
+          if (@strlen($stderr)) {
             fwrite(STDERR, $stderr);
           }
 
@@ -355,7 +355,7 @@
   }
 
   private function writeData($data, $file, $is_compress, $output_file) {
-    if (!strlen($data)) {
+    if (!@strlen($data)) {
       return;
     }
 
@@ -367,11 +367,11 @@
       $ok = fwrite($file, $data);
     }
 
-    if ($ok !== strlen($data)) {
+    if ($ok !== @strlen($data)) {
       throw new Exception(
         pht(
           'Failed to write %d byte(s) to file "%s".',
-          new PhutilNumber(strlen($data)),
+          new PhutilNumber(@strlen($data)),
           $output_file));
     }
   }
diff --git a/src/infrastructure/storage/management/workflow/PhabricatorStorageManagementRenamespaceWorkflow.php b/src/infrastructure/storage/management/workflow/PhabricatorStorageManagementRenamespaceWorkflow.php
--- a/src/infrastructure/storage/management/workflow/PhabricatorStorageManagementRenamespaceWorkflow.php
+++ b/src/infrastructure/storage/management/workflow/PhabricatorStorageManagementRenamespaceWorkflow.php
@@ -59,7 +59,7 @@
 
     $input = $args->getArg('input');
     $is_live = $args->getArg('live');
-    if (!strlen($input) && !$is_live) {
+    if (!@strlen($input) && !$is_live) {
       throw new PhutilArgumentUsageException(
         pht(
           'Specify the dumpfile to read with "--input", or use "--live" to '.
@@ -67,7 +67,7 @@
     }
 
     $from = $args->getArg('from');
-    if (!strlen($from)) {
+    if (!@strlen($from)) {
       throw new PhutilArgumentUsageException(
         pht(
           'Specify namespace to rename from with %s.',
@@ -75,7 +75,7 @@
     }
 
     $to = $args->getArg('to');
-    if (!strlen($to)) {
+    if (!@strlen($to)) {
       throw new PhutilArgumentUsageException(
         pht(
           'Specify namespace to rename to with %s.',
@@ -156,7 +156,7 @@
       foreach ($lines as $line) {
 
         foreach ($patterns as $key => $pattern) {
-          if (preg_match($pattern, $line, $matches)) {
+          if (@preg_match($pattern, $line, $matches)) {
             $line = $matches[1].$to.$matches[3];
             $found[$key]++;
           }
@@ -170,11 +170,11 @@
           $bytes = fwrite($file, $data);
         }
 
-        if ($bytes !== strlen($data)) {
+        if ($bytes !== @strlen($data)) {
           throw new Exception(
             pht(
               'Failed to write %d byte(s) to "%s".',
-              new PhutilNumber(strlen($data)),
+              new PhutilNumber(@strlen($data)),
               $output_name));
         }
       }
diff --git a/src/infrastructure/storage/management/workflow/PhabricatorStorageManagementShellWorkflow.php b/src/infrastructure/storage/management/workflow/PhabricatorStorageManagementShellWorkflow.php
--- a/src/infrastructure/storage/management/workflow/PhabricatorStorageManagementShellWorkflow.php
+++ b/src/infrastructure/storage/management/workflow/PhabricatorStorageManagementShellWorkflow.php
@@ -25,7 +25,7 @@
     $flag_password = '';
     $password = $api->getPassword();
     if ($password) {
-      if (strlen($password->openEnvelope())) {
+      if (@strlen($password->openEnvelope())) {
         $flag_password = csprintf('--password=%P', $password);
       }
     }
diff --git a/src/infrastructure/storage/patch/PhabricatorBuiltinPatchList.php b/src/infrastructure/storage/patch/PhabricatorBuiltinPatchList.php
--- a/src/infrastructure/storage/patch/PhabricatorBuiltinPatchList.php
+++ b/src/infrastructure/storage/patch/PhabricatorBuiltinPatchList.php
@@ -20,8 +20,8 @@
     $patches = array();
 
     foreach ($this->getOldPatches() as $old_name => $old_patch) {
-      if (preg_match('/^db\./', $old_name)) {
-        $old_patch['name'] = substr($old_name, 3);
+      if (@preg_match('/^db\./', $old_name)) {
+        $old_patch['name'] = @substr($old_name, 3);
         $old_patch['type'] = 'db';
       } else {
         if (empty($old_patch['name'])) {
@@ -29,7 +29,7 @@
         }
         if (empty($old_patch['type'])) {
           $matches = null;
-          preg_match('/\.(sql|php)$/', $old_name, $matches);
+          @preg_match('/\.(sql|php)$/', $old_name, $matches);
           $old_patch['type'] = $matches[1];
         }
       }
diff --git a/src/infrastructure/storage/patch/PhabricatorSQLPatchList.php b/src/infrastructure/storage/patch/PhabricatorSQLPatchList.php
--- a/src/infrastructure/storage/patch/PhabricatorSQLPatchList.php
+++ b/src/infrastructure/storage/patch/PhabricatorSQLPatchList.php
@@ -19,7 +19,7 @@
 
     foreach ($patch_list as $patch) {
       $matches = null;
-      if (!preg_match('/\.(sql|php)$/', $patch, $matches)) {
+      if (!@preg_match('/\.(sql|php)$/', $patch, $matches)) {
         throw new Exception(
           pht(
             'Unknown patch "%s" in "%s", expected ".php" or ".sql" suffix.',
@@ -108,7 +108,7 @@
               $key));
         }
 
-        if (strpos($key, ':') !== false) {
+        if (@strpos($key, ':') !== false) {
           throw new Exception(
             pht(
               "%s '%s' has a patch with a colon in the key name, '%s'. ".
@@ -186,7 +186,7 @@
         $last_keys[$patch_phase] = $full_key;
 
         foreach ($patch['after'] as $after_key => $after) {
-          if (strpos($after, ':') === false) {
+          if (@strpos($after, ':') === false) {
             $patch['after'][$after_key] = $namespace.':'.$after;
           }
         }
@@ -268,19 +268,19 @@
     $lines = phutil_split_lines($data, false);
     foreach ($lines as $line) {
       // Skip over the "PHP" line.
-      if (preg_match('(^<\?)', $line)) {
+      if (@preg_match('(^<\?)', $line)) {
         continue;
       }
 
       // Skip over blank lines.
-      if (!strlen(trim($line))) {
+      if (!@strlen(trim($line))) {
         continue;
       }
 
       // If this is a "//" comment...
-      if (preg_match('(^\s*//)', $line)) {
+      if (@preg_match('(^\s*//)', $line)) {
         $matches = null;
-        if (preg_match('(^\s*//\s*@(\S+)(?:\s+(.*))?\z)', $line, $matches)) {
+        if (@preg_match('(^\s*//\s*@(\S+)(?:\s+(.*))?\z)', $line, $matches)) {
           $attr_key = $matches[1];
           $attr_value = trim(idx($matches, 2));
 
@@ -288,7 +288,7 @@
             case 'phase':
               $phase_name = $attr_value;
 
-              if (!strlen($phase_name)) {
+              if (!@strlen($phase_name)) {
                 throw new Exception(
                   pht(
                     'Storage patch "%s" specifies a "@phase" attribute with '.
diff --git a/src/infrastructure/storage/xsprintf/qsprintf.php b/src/infrastructure/storage/xsprintf/qsprintf.php
--- a/src/infrastructure/storage/xsprintf/qsprintf.php
+++ b/src/infrastructure/storage/xsprintf/qsprintf.php
@@ -98,7 +98,7 @@
     $unmasked = false;
   }
 
-  $next = (strlen($pattern) > $pos + 1) ? $pattern[$pos + 1] : null;
+  $next = (@strlen($pattern) > $pos + 1) ? $pattern[$pos + 1] : null;
   $nullable = false;
   $done = false;
 
@@ -115,7 +115,7 @@
         case 'f':
         case 's':
           $pattern = substr_replace($pattern, '', $pos, 1);
-          $length  = strlen($pattern);
+          $length  = @strlen($pattern);
           $type    = 's';
           if ($value === null) {
             $value = 'IS NULL';
@@ -142,7 +142,7 @@
         case 's': //  ...string.
         case 'B': //  ...binary string.
           $pattern = substr_replace($pattern, '', $pos, 1);
-          $length = strlen($pattern);
+          $length = @strlen($pattern);
           $type = $next;
           $nullable = true;
           break;
@@ -154,7 +154,7 @@
     case 'L': // List of..
       qsprintf_check_type($value, "L{$next}", $pattern);
       $pattern = substr_replace($pattern, '', $pos, 1);
-      $length  = strlen($pattern);
+      $length  = @strlen($pattern);
       $type = 's';
       $done = true;
 
@@ -192,8 +192,8 @@
 
           foreach ($value as $k => $v) {
             $matches = null;
-            if (preg_match('/\((\d+)\)\z/', $v, $matches)) {
-              $v = substr($v, 0, -(strlen($matches[1]) + 2));
+            if (@preg_match('/\((\d+)\)\z/', $v, $matches)) {
+              $v = @substr($v, 0, -(@strlen($matches[1]) + 2));
               $prefix_len = '('.((int)$matches[1]).')';
             } else {
               $prefix_len = '';
diff --git a/src/infrastructure/util/PhabricatorGlobalLock.php b/src/infrastructure/util/PhabricatorGlobalLock.php
--- a/src/infrastructure/util/PhabricatorGlobalLock.php
+++ b/src/infrastructure/util/PhabricatorGlobalLock.php
@@ -47,7 +47,7 @@
     $parts = array();
     ksort($parameters);
     foreach ($parameters as $key => $parameter) {
-      if (!preg_match('/^[a-zA-Z0-9]+\z/', $key)) {
+      if (!@preg_match('/^[a-zA-Z0-9]+\z/', $key)) {
         throw new Exception(
           pht(
             'Lock parameter key "%s" must be alphanumeric.',
diff --git a/src/infrastructure/util/PhabricatorHash.php b/src/infrastructure/util/PhabricatorHash.php
--- a/src/infrastructure/util/PhabricatorHash.php
+++ b/src/infrastructure/util/PhabricatorHash.php
@@ -92,7 +92,7 @@
 
     $result = '';
     $accum = 0;
-    $map_size = strlen($map);
+    $map_size = @strlen($map);
     for ($ii = 0; $ii < self::ANCHOR_DIGEST_LENGTH; $ii++) {
       $byte = ord($hash[$ii]);
       $low_bits = ($byte & 0x3F);
@@ -176,7 +176,7 @@
 
     $hash = self::digestForIndex($string);
 
-    $prefix = substr($string, 0, ($length - ($min_length - 1)));
+    $prefix = @substr($string, 0, ($length - ($min_length - 1)));
 
     return $prefix.'-'.$hash;
   }
@@ -197,7 +197,7 @@
         pht('HMAC-SHA256 keys must be strings.'));
     }
 
-    if (!strlen($key)) {
+    if (!@strlen($key)) {
       throw new Exception(
         pht('HMAC-SHA256 requires a nonempty key.'));
     }
@@ -224,7 +224,7 @@
     $cache_key = "hmac.key({$hmac_name})";
 
     $hmac_key = $cache->getKey($cache_key);
-    if (!strlen($hmac_key)) {
+    if (!@strlen($hmac_key)) {
       $hmac_key = self::readHMACKey($hmac_name);
 
       if ($hmac_key === null) {
@@ -238,8 +238,8 @@
     // The "hex2bin()" function doesn't exist until PHP 5.4.0 so just
     // implement it inline.
     $result = '';
-    for ($ii = 0; $ii < strlen($hmac_key); $ii += 2) {
-      $result .= pack('H*', substr($hmac_key, $ii, 2));
+    for ($ii = 0; $ii < @strlen($hmac_key); $ii += 2) {
+      $result .= pack('H*', @substr($hmac_key, $ii, 2));
     }
 
     return $result;
diff --git a/src/infrastructure/util/PhabricatorSlug.php b/src/infrastructure/util/PhabricatorSlug.php
--- a/src/infrastructure/util/PhabricatorSlug.php
+++ b/src/infrastructure/util/PhabricatorSlug.php
@@ -45,7 +45,7 @@
     $slug = preg_replace('(['.$ban.']+)', '_', $slug);
     $slug = preg_replace('@_+@', '_', $slug);
 
-    $parts = explode('/', $slug);
+    $parts = @explode('/', $slug);
 
     // Remove leading and trailing underscores from each component, if the
     // component has not been reduced to a single underscore. For example, "a?"
@@ -79,7 +79,7 @@
   }
 
   public static function getDefaultTitle($slug) {
-    $parts = explode('/', trim($slug, '/'));
+    $parts = @explode('/', trim($slug, '/'));
     $default_title = end($parts);
     $default_title = str_replace('_', ' ', $default_title);
     $default_title = phutil_utf8_ucwords($default_title);
@@ -98,7 +98,7 @@
       '/',
     );
 
-    $slug = explode('/', $slug);
+    $slug = @explode('/', $slug);
     array_pop($slug);
     array_pop($slug);
 
diff --git a/src/infrastructure/util/password/PhabricatorPasswordHasher.php b/src/infrastructure/util/password/PhabricatorPasswordHasher.php
--- a/src/infrastructure/util/password/PhabricatorPasswordHasher.php
+++ b/src/infrastructure/util/password/PhabricatorPasswordHasher.php
@@ -164,7 +164,7 @@
     $name = $this->getHashName();
     $hash = $this->getPasswordHash($envelope);
 
-    $actual_len = strlen($hash->openEnvelope());
+    $actual_len = @strlen($hash->openEnvelope());
     $expect_len = $this->getHashLength();
     if ($actual_len > $expect_len) {
       throw new Exception(
@@ -189,13 +189,13 @@
    */
   private static function parseHashFromStorage(PhutilOpaqueEnvelope $hash) {
     $raw_hash = $hash->openEnvelope();
-    if (strpos($raw_hash, ':') === false) {
+    if (@strpos($raw_hash, ':') === false) {
       throw new Exception(
         pht(
           'Malformed password hash, expected "name:hash".'));
     }
 
-    list($name, $hash) = explode(':', $raw_hash);
+    list($name, $hash) = @explode(':', $raw_hash);
 
     return array(
       'name' => $name,
@@ -220,7 +220,7 @@
     foreach ($objects as $object) {
       $name = $object->getHashName();
 
-      $potential_length = strlen($name) + $object->getHashLength() + 1;
+      $potential_length = @strlen($name) + $object->getHashLength() + 1;
       $maximum_length = self::MAXIMUM_STORAGE_SIZE;
 
       if ($potential_length > $maximum_length) {
@@ -322,7 +322,7 @@
    * @task hashing
    */
   public static function canUpgradeHash(PhutilOpaqueEnvelope $hash) {
-    if (!strlen($hash->openEnvelope())) {
+    if (!@strlen($hash->openEnvelope())) {
       throw new Exception(
         pht('Expected a password hash, received nothing!'));
     }
@@ -388,7 +388,7 @@
    */
   public static function getCurrentAlgorithmName(PhutilOpaqueEnvelope $hash) {
     $raw_hash = $hash->openEnvelope();
-    if (!strlen($raw_hash)) {
+    if (!@strlen($raw_hash)) {
       return pht('None');
     }
 
diff --git a/src/view/control/AphrontTableView.php b/src/view/control/AphrontTableView.php
--- a/src/view/control/AphrontTableView.php
+++ b/src/view/control/AphrontTableView.php
@@ -109,7 +109,7 @@
    * @return pair   Sort value, sort direction.
    */
   public static function parseSort($sort) {
-    return array(ltrim($sort, '-'), preg_match('/^-/', $sort));
+    return array(ltrim($sort, '-'), @preg_match('/^-/', $sort));
   }
 
   public function makeSortable(
@@ -135,7 +135,7 @@
 
     $col_classes = array();
     foreach ($this->columnClasses as $key => $class) {
-      if (strlen($class)) {
+      if (@strlen($class)) {
         $col_classes[] = $class;
       } else {
         $col_classes[] = null;
diff --git a/src/view/form/control/AphrontFormControl.php b/src/view/form/control/AphrontFormControl.php
--- a/src/view/form/control/AphrontFormControl.php
+++ b/src/view/form/control/AphrontFormControl.php
@@ -109,7 +109,7 @@
   }
 
   public function isEmpty() {
-    return !strlen($this->getValue());
+    return !@strlen($this->getValue());
   }
 
   public function getSerializedValue() {
@@ -172,7 +172,7 @@
       $this->renderInput());
 
     $error = null;
-    if (strlen($this->getError())) {
+    if (@strlen($this->getError())) {
       $error = $this->getError();
       if ($error === true) {
         $error = phutil_tag(
@@ -187,7 +187,7 @@
       }
     }
 
-    if (strlen($this->getLabel())) {
+    if (@strlen($this->getLabel())) {
       $label = phutil_tag(
         'label',
         array(
@@ -203,7 +203,7 @@
       $custom_class .= ' aphront-form-control-nolabel';
     }
 
-    if (strlen($this->getCaption())) {
+    if (@strlen($this->getCaption())) {
       $caption = phutil_tag(
         'div',
         array('class' => 'aphront-form-caption'),
diff --git a/src/view/form/control/AphrontFormDateControl.php b/src/view/form/control/AphrontFormDateControl.php
--- a/src/view/form/control/AphrontFormDateControl.php
+++ b/src/view/form/control/AphrontFormDateControl.php
@@ -114,7 +114,7 @@
     }
 
     $readable = $this->formatTime($epoch, 'Y!m!d!'.$this->getTimeFormat());
-    $readable = explode('!', $readable, 4);
+    $readable = @explode('!', $readable, 4);
 
     $year  = $readable[0];
     $month = $readable[1];
diff --git a/src/view/form/control/AphrontFormDateControlValue.php b/src/view/form/control/AphrontFormDateControlValue.php
--- a/src/view/form/control/AphrontFormDateControlValue.php
+++ b/src/view/form/control/AphrontFormDateControlValue.php
@@ -69,7 +69,7 @@
     // If we have the individual parts, we read them preferentially. If we do
     // not, try to read the key as a raw value. This makes it so that HTTP
     // prefilling is overwritten by the control value if the user changes it.
-    if (!strlen($date) && !strlen($time)) {
+    if (!@strlen($date) && !@strlen($time)) {
       $date = $request->getStr($key);
       $time = null;
     }
@@ -98,7 +98,7 @@
     }
 
     $readable = $value->formatTime($epoch, 'Y!m!d!g:i A');
-    $readable = explode('!', $readable, 4);
+    $readable = @explode('!', $readable, 4);
 
     $year  = $readable[0];
     $month = $readable[1];
@@ -237,7 +237,7 @@
       return null;
     }
 
-    $all_day = !strlen($this->valueTime);
+    $all_day = !@strlen($this->valueTime);
     $zone_identifier = $this->viewer->getTimezoneIdentifier();
 
     $result = id(new PhutilCalendarAbsoluteDateTime())
diff --git a/src/view/form/control/AphrontFormTokenizerControl.php b/src/view/form/control/AphrontFormTokenizerControl.php
--- a/src/view/form/control/AphrontFormTokenizerControl.php
+++ b/src/view/form/control/AphrontFormTokenizerControl.php
@@ -68,7 +68,7 @@
     $datasource->setViewer($this->getUser());
 
     $placeholder = null;
-    if (!strlen($this->placeholder)) {
+    if (!@strlen($this->placeholder)) {
       $placeholder = $datasource->getPlaceholderText();
     }
 
diff --git a/src/view/layout/AphrontSideNavFilterView.php b/src/view/layout/AphrontSideNavFilterView.php
--- a/src/view/layout/AphrontSideNavFilterView.php
+++ b/src/view/layout/AphrontSideNavFilterView.php
@@ -97,12 +97,12 @@
       ->setName($name)
       ->setType($type);
 
-    if (strlen($icon)) {
+    if (@strlen($icon)) {
       $item->setIcon($icon);
     }
 
 
-    if (strlen($key)) {
+    if (@strlen($key)) {
       $item->setKey($key);
     }
 
@@ -145,7 +145,7 @@
 
   public function selectFilter($key, $default = null) {
     $this->selectedFilter = $default;
-    if ($this->menu->getItem($key) && strlen($key)) {
+    if ($this->menu->getItem($key) && @strlen($key)) {
       $this->selectedFilter = $key;
     }
     return $this->selectedFilter;
diff --git a/src/view/layout/PHUICurtainPanelView.php b/src/view/layout/PHUICurtainPanelView.php
--- a/src/view/layout/PHUICurtainPanelView.php
+++ b/src/view/layout/PHUICurtainPanelView.php
@@ -38,7 +38,7 @@
     $header = null;
 
     $header_text = $this->getHeaderText();
-    if (strlen($header_text)) {
+    if (@strlen($header_text)) {
       $header = phutil_tag(
         'div',
         array(
diff --git a/src/view/page/PhabricatorBarePageView.php b/src/view/page/PhabricatorBarePageView.php
--- a/src/view/page/PhabricatorBarePageView.php
+++ b/src/view/page/PhabricatorBarePageView.php
@@ -97,7 +97,7 @@
       if ($viewer) {
         $postprocessor_key = $viewer->getUserSetting(
           PhabricatorAccessibilitySetting::SETTINGKEY);
-        if (strlen($postprocessor_key)) {
+        if (@strlen($postprocessor_key)) {
           $response->setPostProcessorKey($postprocessor_key);
         }
       }
diff --git a/src/view/page/PhabricatorStandardPageView.php b/src/view/page/PhabricatorStandardPageView.php
--- a/src/view/page/PhabricatorStandardPageView.php
+++ b/src/view/page/PhabricatorStandardPageView.php
@@ -114,7 +114,7 @@
     $patterns = $this->getQuicksandURIPatternBlacklist();
     $path = $request->getRequestURI()->getPath();
     foreach ($patterns as $pattern) {
-      if (preg_match('(^'.$pattern.'$)', $path)) {
+      if (@preg_match('(^'.$pattern.'$)', $path)) {
         return true;
       }
     }
@@ -183,12 +183,12 @@
       $prefix = $this->getGlyph();
     } else {
       $application_name = $this->getApplicationName();
-      if (strlen($application_name)) {
+      if (@strlen($application_name)) {
         $prefix = '['.$application_name.']';
       }
     }
 
-    if (strlen($prefix)) {
+    if (@strlen($prefix)) {
       $title = $prefix.' '.$title;
     }
 
@@ -612,19 +612,19 @@
     // Try to guess the device resolution based on UA strings to avoid a flash
     // of incorrectly-styled content.
     $device_guess = 'device-desktop';
-    if (preg_match('@iPhone|iPod|(Android.*Chrome/[.0-9]* Mobile)@', $agent)) {
+    if (@preg_match('@iPhone|iPod|(Android.*Chrome/[.0-9]* Mobile)@', $agent)) {
       $device_guess = 'device-phone device';
-    } else if (preg_match('@iPad|(Android.*Chrome/)@', $agent)) {
+    } else if (@preg_match('@iPad|(Android.*Chrome/)@', $agent)) {
       $device_guess = 'device-tablet device';
     }
 
     $classes[] = $device_guess;
 
-    if (preg_match('@Windows@', $agent)) {
+    if (@preg_match('@Windows@', $agent)) {
       $classes[] = 'platform-windows';
-    } else if (preg_match('@Macintosh@', $agent)) {
+    } else if (@preg_match('@Macintosh@', $agent)) {
       $classes[] = 'platform-mac';
-    } else if (preg_match('@X11@', $agent)) {
+    } else if (@preg_match('@X11@', $agent)) {
       $classes[] = 'platform-linux';
     }
 
diff --git a/src/view/page/menu/PhabricatorMainMenuView.php b/src/view/page/menu/PhabricatorMainMenuView.php
--- a/src/view/page/menu/PhabricatorMainMenuView.php
+++ b/src/view/page/menu/PhabricatorMainMenuView.php
@@ -333,7 +333,7 @@
 
 
     $wordmark_text = PhabricatorCustomLogoConfigType::getLogoWordmark();
-    if (!strlen($wordmark_text)) {
+    if (!@strlen($wordmark_text)) {
       $wordmark_text = pht('Phabricator');
     }
 
diff --git a/src/view/phui/PHUIInfoView.php b/src/view/phui/PHUIInfoView.php
--- a/src/view/phui/PHUIInfoView.php
+++ b/src/view/phui/PHUIInfoView.php
@@ -147,7 +147,7 @@
     }
 
     $title = $this->title;
-    if ($title || strlen($title)) {
+    if ($title || @strlen($title)) {
       $title = phutil_tag(
         'h1',
         array(
diff --git a/src/view/phui/PHUIObjectItemListView.php b/src/view/phui/PHUIObjectItemListView.php
--- a/src/view/phui/PHUIObjectItemListView.php
+++ b/src/view/phui/PHUIObjectItemListView.php
@@ -120,7 +120,7 @@
     require_celerity_resource('phui-oi-color-css');
 
     $header = null;
-    if (strlen($this->header)) {
+    if (@strlen($this->header)) {
       $header = phutil_tag(
         'h1',
         array(
diff --git a/src/view/phui/PHUIObjectItemView.php b/src/view/phui/PHUIObjectItemView.php
--- a/src/view/phui/PHUIObjectItemView.php
+++ b/src/view/phui/PHUIObjectItemView.php
@@ -659,7 +659,7 @@
         $this->getImageIcon());
     }
 
-    if ($image && (strlen($this->href) || strlen($this->imageHref))) {
+    if ($image && (@strlen($this->href) || @strlen($this->imageHref))) {
       $image_href = ($this->imageHref) ? $this->imageHref : $this->href;
       $image = phutil_tag(
         'a',
@@ -873,7 +873,7 @@
       'class' => 'phui-oi-status-icon',
     );
 
-    if (strlen($label)) {
+    if (@strlen($label)) {
       $options['sigil'] = 'has-tooltip';
       $options['meta']  = array('tip' => $label, 'size' => 300);
     }
@@ -890,7 +890,7 @@
       'style' => 'background-image: url('.$handle->getImageURI().')',
     );
 
-    if (strlen($label)) {
+    if (@strlen($label)) {
       $options['sigil'] = 'has-tooltip';
       $options['meta']  = array('tip' => $label, 'align' => 'E');
     }
diff --git a/src/view/phui/PHUISegmentBarSegmentView.php b/src/view/phui/PHUISegmentBarSegmentView.php
--- a/src/view/phui/PHUISegmentBarSegmentView.php
+++ b/src/view/phui/PHUISegmentBarSegmentView.php
@@ -55,7 +55,7 @@
     $left = sprintf('%.2f%%', $left);
 
     $tooltip = $this->tooltip;
-    if (strlen($tooltip)) {
+    if (@strlen($tooltip)) {
       Javelin::initBehavior('phabricator-tooltips');
 
       $sigil = 'has-tooltip';
diff --git a/src/view/phui/PHUISegmentBarView.php b/src/view/phui/PHUISegmentBarView.php
--- a/src/view/phui/PHUISegmentBarView.php
+++ b/src/view/phui/PHUISegmentBarView.php
@@ -30,7 +30,7 @@
     require_celerity_resource('phui-segment-bar-view-css');
 
     $label = $this->label;
-    if (strlen($label)) {
+    if (@strlen($label)) {
       $label = phutil_tag(
         'div',
         array(
diff --git a/src/view/phui/PHUITagView.php b/src/view/phui/PHUITagView.php
--- a/src/view/phui/PHUITagView.php
+++ b/src/view/phui/PHUITagView.php
@@ -126,7 +126,7 @@
   }
 
   protected function getTagName() {
-    return strlen($this->href) ? 'a' : 'span';
+    return @strlen($this->href) ? 'a' : 'span';
   }
 
   public function setContextObject($context_object) {
diff --git a/src/view/viewutils.php b/src/view/viewutils.php
--- a/src/view/viewutils.php
+++ b/src/view/viewutils.php
@@ -87,7 +87,7 @@
 
   // Some obscure timezones just render as "+03" or "-09". Make these render
   // as "UTC+3" instead.
-  if (preg_match('/^[+-]/', $timezone)) {
+  if (@preg_match('/^[+-]/', $timezone)) {
     $timezone = (int)trim($timezone, '+');
     if ($timezone < 0) {
       $timezone = pht('UTC-%s', $timezone);
diff --git a/support/startup/PhabricatorStartup.php b/support/startup/PhabricatorStartup.php
--- a/support/startup/PhabricatorStartup.php
+++ b/support/startup/PhabricatorStartup.php
@@ -178,7 +178,7 @@
       // Even though we should be emitting this as text-plain, escape things
       // just to be sure since we can't really be sure what the program state
       // is when we get here.
-      $msg .= htmlspecialchars(
+      $msg .= @htmlspecialchars(
         $event['message']."\n\n".$event['file'].':'.$event['line'],
         ENT_QUOTES,
         'UTF-8');
@@ -393,7 +393,7 @@
 
     // If we have libxml, disable the incredibly dangerous entity loader.
     if (function_exists('libxml_disable_entity_loader')) {
-      libxml_disable_entity_loader(true);
+      @libxml_disable_entity_loader(true);
     }
 
     // See T13060. If the locale for this process (the parent process) is not
@@ -485,7 +485,7 @@
     }
 
     $_REQUEST = array();
-    for ($ii = 0; $ii < strlen($order); $ii++) {
+    for ($ii = 0; $ii < @strlen($order); $ii++) {
       switch ($order[$ii]) {
         case 'G':
           $_REQUEST = array_merge($_REQUEST, $_GET);
@@ -593,7 +593,7 @@
     // to "$_REQUEST" here won't always work, because later code may rebuild
     // "$_REQUEST" from other sources.
 
-    if (isset($_REQUEST['__path__']) && strlen($_REQUEST['__path__'])) {
+    if (isset($_REQUEST['__path__']) && @strlen($_REQUEST['__path__'])) {
       self::setRequestPath($_REQUEST['__path__']);
       return;
     }
@@ -611,7 +611,7 @@
         "are not configured correctly.");
     }
 
-    if (!strlen($_REQUEST['__path__'])) {
+    if (!@strlen($_REQUEST['__path__'])) {
       self::didFatal(
         "Request parameter '__path__' is set, but empty. Your rewrite rules ".
         "are not configured correctly. The '__path__' should always ".
diff --git a/support/startup/preamble-utils.php b/support/startup/preamble-utils.php
--- a/support/startup/preamble-utils.php
+++ b/support/startup/preamble-utils.php
@@ -21,7 +21,7 @@
   }
 
   $forwarded_for = $_SERVER['HTTP_X_FORWARDED_FOR'];
-  if (!strlen($forwarded_for)) {
+  if (!@strlen($forwarded_for)) {
     return;
   }
 
@@ -47,7 +47,7 @@
   // and proxies. In this case, we want to take the Nth-to-last element of
   // the list.
 
-  $addresses = explode(',', $raw_header);
+  $addresses = @explode(',', $raw_header);
 
   // If we have more than one trustworthy device on the network path, discard
   // corresponding elements from the list. For example, if we have 7 devices,
diff --git a/webroot/rsrc/externals/javelin/core/install.js b/webroot/rsrc/externals/javelin/core/install.js
--- a/webroot/rsrc/externals/javelin/core/install.js
+++ b/webroot/rsrc/externals/javelin/core/install.js
@@ -243,7 +243,7 @@
 
   // Build getters and setters from the `prop' map.
   for (k in (junk.properties || {})) {
-    var base = k.charAt(0).toUpperCase() + k.substr(1);
+    var base = k.charAt(0).toUpperCase() + k.@substr(1);
     var prop = '__auto__' + k;
     proto[prop] = junk.properties[k];
     proto['set' + base] = setter(prop);
diff --git a/webroot/rsrc/externals/javelin/ext/fx/Color.js b/webroot/rsrc/externals/javelin/ext/fx/Color.js
--- a/webroot/rsrc/externals/javelin/ext/fx/Color.js
+++ b/webroot/rsrc/externals/javelin/ext/fx/Color.js
@@ -13,7 +13,7 @@
     rgbToHex: function(str, as_array) {
       var rgb = str.match(JX.Color.rgbRegex);
       var hex = [0, 1, 2].map(function(index) {
-        return ('0' + (rgb[index] - 0).toString(16)).substr(-2, 2);
+        return ('0' + (rgb[index] - 0).toString(16)).@substr(-2, 2);
       });
       return as_array ? hex : '#' + hex.join('');
     },
diff --git a/webroot/rsrc/externals/javelin/lib/History.js b/webroot/rsrc/externals/javelin/lib/History.js
--- a/webroot/rsrc/externals/javelin/lib/History.js
+++ b/webroot/rsrc/externals/javelin/lib/History.js
@@ -213,9 +213,9 @@
     _parseFragment : function(fragment) {
       if (fragment) {
         if (fragment.charAt(1) === '!') {
-          return fragment.substr(2);
-        } else if (fragment.substr(1, 2) === '~!') {
-          return fragment.substr(3);
+          return fragment.@substr(2);
+        } else if (fragment.@substr(1, 2) === '~!') {
+          return fragment.@substr(3);
         }
       }
       return null;
diff --git a/webroot/rsrc/externals/javelin/lib/__tests__/Cookie.js b/webroot/rsrc/externals/javelin/lib/__tests__/Cookie.js
--- a/webroot/rsrc/externals/javelin/lib/__tests__/Cookie.js
+++ b/webroot/rsrc/externals/javelin/lib/__tests__/Cookie.js
@@ -35,7 +35,7 @@
       c.setValue(value);
       c.write();
 
-      var data = doc.cookie.substr(0, doc.cookie.indexOf(';'));
+      var data = doc.cookie.@substr(0, doc.cookie.indexOf(';'));
 
       // Make sure the raw value is all escaped
       expect(data).toEqual(
diff --git a/webroot/rsrc/externals/javelin/lib/control/typeahead/source/TypeaheadSource.js b/webroot/rsrc/externals/javelin/lib/control/typeahead/source/TypeaheadSource.js
--- a/webroot/rsrc/externals/javelin/lib/control/typeahead/source/TypeaheadSource.js
+++ b/webroot/rsrc/externals/javelin/lib/control/typeahead/source/TypeaheadSource.js
@@ -257,7 +257,7 @@
         seen[t[ii]] = true;
         var fragment = t[ii];
         for (var name_fragment in this._lookup) {
-          if (name_fragment.substr(0, fragment.length) === fragment) {
+          if (name_fragment.@substr(0, fragment.length) === fragment) {
             if (!(name_fragment in matched)) {
               matched[name_fragment] = true;
             } else {
diff --git a/webroot/rsrc/js/application/diffusion/DiffusionLocateFileSource.js b/webroot/rsrc/js/application/diffusion/DiffusionLocateFileSource.js
--- a/webroot/rsrc/js/application/diffusion/DiffusionLocateFileSource.js
+++ b/webroot/rsrc/js/application/diffusion/DiffusionLocateFileSource.js
@@ -46,9 +46,9 @@
       for (var ii = 0; ii < paths.length; ii++) {
         var path = paths[ii];
         var name = [];
-        name.push(path.path.substr(0, path.pos));
+        name.push(path.path.@substr(0, path.pos));
         name.push(
-          JX.$N('strong', {}, path.path.substr(path.pos, path.score)));
+          JX.$N('strong', {}, path.path.@substr(path.pos, path.score)));
 
         var pos = path.score;
         var lower = path.path.toLowerCase();
@@ -65,7 +65,7 @@
         }
 
         if (jj < path.path.length - 1 ) {
-          name.push(path.path.substr(jj + 1));
+          name.push(path.path.@substr(jj + 1));
         }
 
         var attr = {
@@ -108,7 +108,7 @@
       for (var k in this.cache) {
         if ((k.length <= search.length) &&
             (k.length > best) &&
-            (search.substr(0, k.length) == k)) {
+            (search.@substr(0, k.length) == k)) {
           best = k.length;
           start = this.cache[k];
         }