Craft\InstantAnalyticsService::_getGclid PHP Method

    private function _getGclid()
    {
        $gclid = "";
        if (isset($_GET['gclid'])) {
            $gclid = $_GET['gclid'];
            if (!empty($gclid)) {
                setcookie("gclid", $gclid, time() + 10 * 365 * 24 * 60 * 60, "/");
            }
        }
        return $gclid;
    }