$xml = simplexml_load_file("http://www.geoplugin.net/xml.gp?ip=".getRealIpAddr());
    $country = $xml->geoplugin_countryName ;
    if($country != "Germany")
    {
      //Show your Ad!!
    }



//For getting IP Address

    function getRealIpAddr()
    {
        if (!empty($_SERVER['HTTP_CLIENT_IP']))   //check ip from share internet
        {
          $ip=$_SERVER['HTTP_CLIENT_IP'];
        }
        elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR']))   //to check ip is pass from proxy
        {
          $ip=$_SERVER['HTTP_X_FORWARDED_FOR'];
        }
        else
        {
          $ip=$_SERVER['REMOTE_ADDR'];
        }
        return $ip;
    }