if ((x($_SERVER, 'QUERY_STRING')) && substr($_SERVER['QUERY_STRING'], 0, 9) === 'pagename=') {
$this->query_string = substr($_SERVER['QUERY_STRING'], 9);
if ((x($_SERVER, 'QUERY_STRING')) && substr($_SERVER['QUERY_STRING'], 0, 9) === 'pagename=') {
$this->query_string = substr($_SERVER['QUERY_STRING'], 9);