diff --git a/modules/api/php/endpoints/candidate/visit/image/format/raw.class.inc b/modules/api/php/endpoints/candidate/visit/image/format/raw.class.inc
index f215e56694e..9720c0086e1 100644
--- a/modules/api/php/endpoints/candidate/visit/image/format/raw.class.inc
+++ b/modules/api/php/endpoints/candidate/visit/image/format/raw.class.inc
@@ -140,13 +140,13 @@ class Raw extends Endpoint implements \LORIS\Middleware\ETagCalculator
 
         $callback = function () use ($mincpath, $fullpath) {
             return shell_exec(
-                "${mincpath}/bin/minctoraw -byte -unsigned -normalize $fullpath"
+                "{$mincpath}/bin/minctoraw -byte -unsigned -normalize $fullpath"
             );
         };
 
         return (new \LORIS\Http\Response())
             ->withHeader('Content-Type', 'application/x.raw')
-            ->withHeader('Content-Disposition', "attachment; filename=${filename}")
+            ->withHeader('Content-Disposition', "attachment; filename={$filename}")
             ->withBody(new \Laminas\Diactoros\CallbackStream($callback));
     }
 
diff --git a/php/installer/Database.class.inc b/php/installer/Database.class.inc
index 12f0afe39f6..44afdbb29dc 100644
--- a/php/installer/Database.class.inc
+++ b/php/installer/Database.class.inc
@@ -74,8 +74,8 @@ class Database
         if ($table == '*') {
             $table = '\*';
         }
-        $pattern = "/GRANT .*(ALL|${privilege}).* ON" .
-            " `?([*]|${database})`?[.]`?([*]|${table})`?/";
+        $pattern = "/GRANT .*(ALL|{$privilege}).* ON" .
+            " `?([*]|{$database})`?[.]`?([*]|{$table})`?/";
 
         // Test all privileges return from SHOW GRANTS against the pattern
         return array_reduce(