	protected function _downloadErrorLog()
	{
		$tmpDir = TMP . 'logs' . DS;
		$Folder = new Folder($tmpDir);
		$files = $Folder->read(true, true, false);
		if (count($files[0]) === 0 && count($files[1]) === 0) {
			return false;
		}
		// ZIP圧縮して出力
		$fileName = 'basercms_logs_' . date('Ymd_His');
		$Simplezip = new Simplezip();
		$Simplezip->addFolder($tmpDir);
		$Simplezip->download($fileName);
		return true;
	}