public function getClientIp()
    {
        if (isset($_SERVER['HTTP_CLIENT_IP'])) {
            $ipaddress = $_SERVER['HTTP_CLIENT_IP'];
        } elseif (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) {
            $ipaddress = $_SERVER['HTTP_X_FORWARDED_FOR'];
        } elseif (isset($_SERVER['HTTP_X_FORWARDED'])) {
            $ipaddress = $_SERVER['HTTP_X_FORWARDED'];
        } elseif (isset($_SERVER['HTTP_FORWARDED_FOR'])) {
            $ipaddress = $_SERVER['HTTP_FORWARDED_FOR'];
        } elseif (isset($_SERVER['HTTP_FORWARDED'])) {
            $ipaddress = $_SERVER['HTTP_FORWARDED'];
        } elseif (isset($_SERVER['REMOTE_ADDR'])) {
            $ipaddress = $_SERVER['REMOTE_ADDR'];
        } else {
            $ipaddress = '';
        }

        return $ipaddress;
    }