Jelix\Routing\ClientRequest::getIP PHP Method

    function getIP()
    {
        if (isset($_SERVER['HTTP_X_FORWARDED_FOR']) && $_SERVER['HTTP_X_FORWARDED_FOR']) {
            // it may content ips of all traversed proxies.
            $list = preg_split('/[\\s,]+/', $_SERVER['HTTP_X_FORWARDED_FOR']);
            $list = array_reverse($list);
            $lastIp = '';
            foreach ($list as $ip) {
                $ip = trim($ip);
                if (preg_match('/^(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})\\.(\\d{1,3})$/', $ip, $m)) {
                    if ($m[1] == '10' || $m[1] == '010' || $m[1] == '172' && intval($m[2]) & 240 == 16 || $m[1] == '192' && $m[2] == '168') {
                        break;
                    }
                    // stop at first private address. we just want the last public address
                    $lastIp = $ip;
                } elseif (preg_match('/^(?:[a-f0-9]{1,4})(?::(?:[a-f0-9]{1,4})){7}$/i', $ip)) {
                    $lastIp = $ip;
                }
            }
            if ($lastIp) {
                return $lastIp;
            }
        }
        if (isset($_SERVER['HTTP_CLIENT_IP']) && $_SERVER['HTTP_CLIENT_IP']) {
            return $_SERVER['HTTP_CLIENT_IP'];
        } else {
            return $_SERVER['REMOTE_ADDR'];
        }
    }