View file Ad4fun.com/serve/cnty.php

<?php
$two_letter_country_code=iptocountry($_GET['ip']);
//include 'ip_files/countries.php';
header("Location: flags/$two_letter_country_code.gif");
//functions
function iptocountry($ip) {
    $numbers = preg_split( "/\./", $ip);
    include("ip_files/".$numbers[0].".php");
    $code=($numbers[0] * 16777216) + ($numbers[1] * 65536) + ($numbers[2] * 256) + ($numbers[3]);
    foreach($ranges as $key => $value){
        if($key<=$code){
            if($ranges[$key][0]>=$code){$country=$ranges[$key][1];break;}
            }
    }
    if ($country==""){$country="noflag";}
    return $country;
}
?>