<?
function getip()

{

   if (getenv("HTTP_CLIENT_IP") && strcasecmp(getenv("HTTP_CLIENT_IP"), "unknown"))

           $ip = getenv("HTTP_CLIENT_IP");

       else if (getenv("HTTP_X_FORWARDED_FOR") && strcasecmp(getenv("HTTP_X_FORWARDED_FOR"), "unknown"))

           $ip = getenv("HTTP_X_FORWARDED_FOR");

       else if (getenv("REMOTE_ADDR") && strcasecmp(getenv("REMOTE_ADDR"), "unknown"))

           $ip = getenv("REMOTE_ADDR");

       else if (isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], "unknown"))

           $ip = $_SERVER['REMOTE_ADDR'];

       else

           $ip = "unknown";

   return($ip);

}
$ip = getip();
$myFile = "ip.txt";
$fh = fopen($myFile, 'w+a') or die("can't open file");
fwrite($fh, "$ip\n");
fclose($fh);

?>