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
@@ -55,7 +55,7 @@
     $limit = $request->getValue('limit');
 
     if (strlen($against_hash)) {
-      $commit_range = "${against_hash}..${commit_hash}";
+      $commit_range = "{$against_hash}..{$commit_hash}";
     } else {
       $commit_range = $commit_hash;
     }
diff --git a/src/applications/herald/phid/HeraldTranscriptPHIDType.php b/src/applications/herald/phid/HeraldTranscriptPHIDType.php
--- a/src/applications/herald/phid/HeraldTranscriptPHIDType.php
+++ b/src/applications/herald/phid/HeraldTranscriptPHIDType.php
@@ -35,7 +35,7 @@
       $id = $xscript->getID();
 
       $handle->setName(pht('Transcript %s', $id));
-      $handle->setURI("/herald/transcript/${id}/");
+      $handle->setURI("/herald/transcript/$id/");
     }
   }