public function addCookie($key, $value) {

		if(false === is_string($key)) {
			return trigger_error(sprintf('Argument 1 passed to %s() must be of the type string, "%s" given', __METHOD__, gettype($key)), E_USER_ERROR);
		}

		if(false === is_string($value)) {
			return trigger_error(sprintf('Argument 2 passed to %s() must be of the type string, "%s" given', __METHOD__, gettype($value)), E_USER_ERROR);
		}

		$this -> cookies[] = sprintf('%s=%s', $key, $value);

		return $this;
	}