if (!empty($downloadfilename)) {
        $phpThumb->DebugMessage('SendSaveAsFileHeaderIfNeeded() sending header: Content-Disposition: ' . (!empty($_GET['down']) ? 'attachment' : 'inline') . '; filename="' . $downloadfilename . '"', __FILE__, __LINE__);
        header('Content-Disposition: ' . (!empty($_GET['down']) ? 'attachment' : 'inline') . '; filename="' . $downloadfilename . '"');
    }