<php> echo "IP地址为 <a href='http://ip.cn/" . $_SERVER['REMOTE_ADDR'] . "'>" . $_SERVER['REMOTE_ADDR'] . "</a><br/>"; echo "用户代理为 <tt>" . $_SERVER['HTTP_USER_AGENT'] . "</tt><br/>"; echo "HTTP_VIA: " . $_SERVER['HTTP_VIA'] . "<br/>"; echo "X-Forwarded-For(代理前的IP地址): " . $_SERVER['HTTP_X_FORWARDED_FOR'] . "<br/>"; </php>