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 (phutil_nonempty_string($name)) {
       $query->withNameContains($name);
     }
 
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 (!phutil_nonempty_string($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($this->getQueryKey())) {
+    if (phutil_nonempty_string($this->getQueryKey())) {
       return null;
     }
 
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 (phutil_nonempty_string($order) && isset($builtin[$order])) {
       $query->setOrder($order);
     } else {
       // If the order is invalid or not available, we choose the first
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 (!phutil_nonempty_string($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
@@ -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) && phutil_nonempty_string($key)) {
       $this->selectedFilter = $key;
     }
     return $this->selectedFilter;
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 || phutil_nonempty_string($title)) {
       $title = phutil_tag(
         'h1',
         array(