Objects no longer need to be explicitly passed by ref to call_user_func*() to be callable. Props wonderboymusic. fixes #21865

git-svn-id: https://develop.svn.wordpress.org/trunk@22118 602fd350-edb4-49c9-b593-d223f7449a82

wp-includes/class-wp.php

@@ -606,7 +606,7 @@ class WP_MatchesMapRegex {
 	 * @return string
 	 */
 	function _map() {
-		$callback = array(&$this, 'callback');
+		$callback = array($this, 'callback');
 		return preg_replace_callback($this->_pattern, $callback, $this->_subject);
 	}