geoiptest2.php

<?php
function get_continent_by_ip($ip = false) {
    $code = false;

    if (!$ip) {
        $client = @$_SERVER['HTTP_CLIENT_IP'];
        $forward = @$_SERVER['HTTP_X_FORWARDED_FOR'];
        $remote = @$_SERVER['REMOTE_ADDR'];

        if (filter_var($client, FILTER_VALIDATE_IP)) {
            $ip = $client;
        } elseif (filter_var($forward, FILTER_VALIDATE_IP)) {
            $ip = $forward;
        } else {
            $ip = $remote;
        }
    }

    $response = @json_decode(file_get_contents("http://www.geoplugin.net/json.gp?ip={$ip}"));

    if ($response && isset($response->geoplugin_continentCode)) {
        $code = $response->geoplugin_continentCode;
    }

    return $code;
}
//$detectedip = $_SERVER['REMOTE_ADDR'];
//get_continent_by_ip($detectedip);
get_continent_by_ip('8.8.8.8');
?>