Ticket #11212: 11212.patch

wp-includes/functions.php

@@ -2718 +2718 @@
  * to be merged into another array.
  *
  * @since 2.2.0
+ * @uses apply_filters() Calls 'wp_parse_args' hook with return value as well as $args and $defaults.
  *
  * @param string|array $args Value to merge with $defaults
  * @param array $defaults Array that serves as the defaults.
@@ -2732 +2733 @@
                 wp_parse_str( $args, $r );
 
         if ( is_array( $defaults ) )
-                return array_merge( $defaults, $r );
-        return $r;
+                $r = array_merge( $defaults, $r );
+
+        return apply_filters( 'wp_parse_args', $r, $args, $defaults );
 }
 
 /**