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In php you would write in an appropriate place:

$client = new SoapClient('http://stigbo.dk/ip2country/ip2country.wsdl');
$res    = $client->IpQuery($_SERVER["REMOTE_ADDR"]);

and then you can access the values: ctry, cntry, country, mesg by WLOG:

$res->country

These represents the ISO2 country code, the ISO3 country code, the country name and a status message, respectively.