Introducing tutorials on quickly exporting Table data with PHP

//先获取某个数据
          $date = input();
          $id = @$date['data'];
         $dataResult=Db::table('demo')
             ->where('id','in',$id)
             ->select();
//        $dataResult = input('data');
//        $dataResult = json_decode($dataResult,true);
//        dump($dataResult);die;
        $headTitle = "XX数据";
        $title = date("Y-m-d")."-"."XX数据导出数据";
//        $headtitle = "{$headTitle}";
        $headtitle = "{$headTitle}";
        $titlename="
           编号
           XX标题
           姓名
           年龄
           性别
           XX号
           XX室
           XX区
           XX志
           XX时间
           XX操作
           XX备注
           XX修改
           XX时间
           XX类型
           XX标识
       ";
        $filename = $title.".xls";
//        dump($title);
        $this->excelData($dataResult,$titlename,$headtitle,$filename);

public function excelData($datas,$titlename,$title,$filename)
  {
      $str = "