Ticket #44533: 44533.patch

src/wp-includes/functions.php

@@ -5553 +5553 @@
  * @return bool True if the path is a stream URL.
  */
 function wp_is_stream( $path ) {
-        $wrappers    = stream_get_wrappers();
-        $wrappers    = array_map( 'preg_quote', $wrappers );
+        $wrappers = stream_get_wrappers();
+        foreach ( $wrappers as &$wrapper ) {
+                $wrapper = preg_quote( $wrapper, '!' );
+        }
+
         $wrappers_re = '(' . join( '|', $wrappers ) . ')';
 
         return preg_match( "!^$wrappers_re://!", $path ) === 1;