PHP使用phpqrcode生成二维码

 public function createTempQrcode($data)
     {
         require_once 'E:\WWW\customer/public/admin/lib/phpqrcode/phpqrcode.php';
         $object = new \QRcode();
         $errorCorrectionLevel = 'L';    //容错级别
         $matrixPointSize = 5;            //生成图片大小
         
         //打开缓冲区
        ob_start();
         //生成二维码图片
         $returnData = $object->png($data,false,$errorCorrectionLevel, $matrixPointSize, 2);
         //这里就是把生成的图片流从缓冲区保存到内存对象上，使用base64_encode变成编码字符串，通过json返回给页面。
         $imageString = base64_encode(ob_get_contents());
         //关闭缓冲区
         ob_end_clean();
         $base64 = "data:image/png;base64,".$imageString;
         
         $result['errcode'] = 0;
         $result['errmsg'] = 'ok';
         $result['data'] = $base64;
         return $result;
            }

  public function end_index()
     {
         $this->assign('title','订单');
         $data = Db::name('order')->alias('o')->field('o.*,u.type,u.id uid,u.userFace,u.nickName')->join('user u','o.uid = u.id')->where('status',4)->select();
         foreach ($data as $key => $value) {
             $data[$key]['img'] = explode(';', rtrim($value['img'],';'));
         }
         $this->assign('data',$data);
        return view();
     }