#'; $pre_replace = '\1'; return preg_replace($pre_regex, $pre_replace, $html); } public function postFilter($html, $config, $context) { $post_regex = '#([A-Za-z0-9]+)#'; return preg_replace_callback($post_regex, array($this, 'postFilterCallback'), $html); } protected function postFilterCallback($matches) { return ''; } }