function GetIP(){
 if(getenv("HTTP_CLIENT_IP")) {
 $ip = getenv("HTTP_CLIENT_IP");
 } elseif(getenv("HTTP_X_FORWARDED_FOR")) {
 $ip = getenv("HTTP_X_FORWARDED_FOR");
 if (strstr($ip, ',')) {
 $tmp = explode (',', $ip);
 $ip = trim($tmp[0]);
 }
 } else {
 $ip = getenv("REMOTE_ADDR");
 }
 return $ip;
}

$ipAdresi = GetIP();
echo $ipAdresi;