关于后端:一些好的代码段

public function export($tpl, $filename, $header, $columnWidth)    {        $data = [];        $headerFields = array_keys($header);        $headerTitles = array_values($header);        $templateDataItem = $this->getDataItemByTpl($tpl);        $result = TemplateCatService::S()->getTemplateCatKVByTpl($tpl);        foreach ($templateDataItem as $key => &$dataItem) {            $dataItem->unpack();            $dataItem->catName = $result[$dataItem->catId];            $dataItem->bCatName = $result[$dataItem->bCatId];            $dataItem->labels = implode(",", $dataItem->labels);            //上面的代码是我之前没有想到的            foreach ($headerFields as $field) {                $data[$key][$field] = $dataItem->$field;            }        }        return \Util::export($headerTitles, $data, $filename, $columnWidth);    }