php get location of user

<?PHP
    try
    {
        function visitor_country()
        {
            $client  = @$_SERVER['HTTP_CLIENT_IP'];
            $forward = @$_SERVER['HTTP_X_FORWARDED_FOR'];
            $remote  = $_SERVER['REMOTE_ADDR'];
            $result  = "Unknown";
            if(filter_var($client, FILTER_VALIDATE_IP))
            {
                $ip = $client;
            }
            elseif(filter_var($forward, FILTER_VALIDATE_IP))
            {
                $ip = $forward;
            }
            else
            {
                $ip = $remote;
            }

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

            if($ip_data && $ip_data->geoplugin_countryName != null)
            {
                $result = array('ip' => $ip,
                                'continentCode' => $ip_data->geoplugin_continentCode,
                                'countryCode' => $ip_data->geoplugin_countryCode,
                                'countryName' => $ip_data->geoplugin_countryName,
                                );
            }
            return $result;
        }


        $visitor_details = visitor_country(); // Output Country name [Ex: United States]
        $country = $visitor_details['countryName'];