PHP-php preg_replace_callback返回值问题

Question

preg_replace_callback('/(#|{)(.*)(#|})/U',
                                create_function('$matches', '
                                        if($matches[2]) {
                                            return '.stripslashes($matches[2]).';
                                        } else {
                                            return "";
                                        }
                                  '),addslashes($values))."',";