找出使用者IP位置

<?
        $route = $_SERVER['HTTP_X_FORWARDED_FOR'];
        $ip = split(', ', $route);
        $ip = (empty($route))? $_SERVER['REMOTE_ADDR']: $ip[0];
     
        header("Pragma: no-cache");
        header("Cache-Control: no-cache, must-revalidate");
     
        echo "<style type=\"text/css\">*{font:12px Verdana;line-height:20px}</style>";
     
        echo "Your IP Address: <br>";
        if(!empty($route)){
                echo "$ip (by HTTP_X_FORWARDED_FOR) <br> Route: <br> $route";
        }else{
                echo "$ip (by REMOTE_ADDR)";
        }

?>