function addRef($url) {
    if (empty($url) || $url == '#') return $url;
    $url = rtrim($url, '/');  // Sondaki / sil
    $ayrac = (strpos($url, '?') !== false) ? '&' : '?';  // Zaten ? varsa & kullan
    return $url . $ayrac . 'ref=Metin2epvpserver/';
}<meta http-equiv="refresh" content="0;URL=uyegiris">