PHP: Find user's country

function getVisIpAddr() { 
      
    if (!empty($_SERVER['HTTP_CLIENT_IP'])) { 
        return $_SERVER['HTTP_CLIENT_IP']; 
    } 
    else if (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) { 
        return $_SERVER['HTTP_X_FORWARDED_FOR']; 
    } 
    else { 
        return $_SERVER['REMOTE_ADDR']; 
    } 
} 
  
function get_country(){
    $vis_ip = getVisIPAddr(); 
    $ipdat = @json_decode(file_get_contents( "http://www.geoplugin.net/json.gp?ip=" . $vis_ip)); 
    return $ipdat->geoplugin_countryName;
}