How can I set free geo targeting ads/banners?
<?php
require_once("geoip.inc");

$gi = geoip_open("GeoIP.dat",GEOIP_STANDARD);

$country_code = geoip_country_code_by_addr($gi, $_SERVER['REMOTE_ADDR']);
geoip_close($gi);

if($country_code == 'US')
{
        echo 'usa';
} else {
        echo 'world';
}
?>