public function execute($code = null) {

		if(null !== $code && false === ('-' . intval($code) == '-' . $code)) {
			return trigger_error(sprintf('Argument 1 passed to %s() must be of the type integer, "%s" given', __METHOD__, gettype($code)), E_USER_ERROR);
		}

		$this -> setUrl();

		if(null !== $this -> seconds) {
			return Response :: addHeader('refresh', sprintf('%d;url=%s', $this -> seconds, $this -> url), $code);
		}

		Response :: addHeader('Location', $this -> url, $code);
	}