GeoIP for PHP

<?php
/* GeoIP functionality for PHP project */

$ip=$_SERVER["REMOTE_ADDR"];
include("geoip.inc");
$gi0 = geoip_open("GeoIP.dat",GEOIP_STANDARD);
$country_code = geoip_country_code_by_addr($gi0, $ip );
echo $country_code;
geoip_close($gi0);
?>