gistfile1.aw

function ip2country($ipv4) {
        $sock = fsockopen("whois.ripe.net", 43);
        fwrite($sock, $ipv4."\n");
        $info = '';
        while (!feof($sock)) {
            $info .= fgetc($sock);
        }
        fclose($sock);
        preg_match("/country:[ ]+([A-Z]{2})\n/", $info, $match);
        if(isset($match[1])) 
            return $match[1];
        else 
            return 'n/a';
 }