[PHP] 取得使用者正確IP

        function getIp()
        {
                if(empty($_SERVER['HTTP_X_FORWARDED_FOR']))
                {
                        $proxyIp        = split(',', $_SERVER['HTTP_X_FORWARDED_FOR']);
                        $UP             = $proxyIp[0];
                }
                else
                {                        $ip     = $_SERVER['REMOTE_ADDR'];
                }
                return $ip;
        }