if ($_SERVER["HTTP_X_FORWARDED_FOR"]) { if ($_SERVER["HTTP_CLIENT_IP"]) { $proxy = $_SERVER["HTTP_CLIENT_IP"]; } else { $proxy = $_SERVER["REMOTE_ADDR"]; } $ip = $_SERVER["HTTP_X_FORWARDED_FOR"]; } else { if ($_SERVER["HTTP_CLIENT_IP"]) { $ip = $_SERVER["HTTP_CLIENT_IP"]; } else { $ip = $_SERVER["REMOTE_ADDR"]; } } echo "Your IP $ip<BR>\n"; if (isset($proxy)) { echo "Your proxy IP is $proxy<BR>\n"; }
原文:http://www.cnblogs.com/saonian/p/5311698.html