$request_uri = $_SERVER['REQUEST_URI']; $clean_url = strtok($request_uri, '?'); $allowed_params = ['page']; $noindex = false; if (!empty($_GET)) { foreach ($_GET as $key => $value) { if (!in_array($key, $allowed_params)) { $noindex = true; break; } } } echo ''; if ($noindex) { echo ''; }