protected static function checkReferrerList($botreferrerlist, $referrer_DNS)
    {
        //Prüfung
        foreach ($botreferrerlist as $botreferrer)
        {
            $CheckBotRef = str_ireplace($botreferrer, '#', $referrer_DNS);
            if ($referrer_DNS != $CheckBotRef)
            {
                return true;
            };
        }
        return false;
    }