public function getIP() {
        $ip = "UNKNOWN";

        if (getenv("HTTP_CLIENT_IP")) {
            $ip = getenv("HTTP_CLIENT_IP");
        } else if(getenv("HTTP_X_FORWARDED_FOR")) {
            $ip = getenv("HTTP_X_FORWARDED_FOR");
        } else if(getenv("REMOTE_ADDR")) {
            $ip = getenv("REMOTE_ADDR");
        }

        return $ip;
    }