oop中 限制文件类型和大小

 <?php
 /**
  * Created by IntelliJ IDEA.
  * User: jiabinwang
  * Date: 7/5/18
  * Time: 8:46 PM
  */

 namespace ElemeOpenApi\Efs;

 use ElemeOpenApi\Api\ContentService;
 use ElemeOpenApi\Config\Config;
 use ElemeOpenApi\Exception\BusinessException;

 class UploadVideoClient
 {
     private $config;
     private $token;

     private $file_ext_list = array("MP4", "MOV");
     private $file_max_size = 200;

     public function __construct($token, Config $config)
     {
         $this -> config = $config;
         $this -> token = $token;
     }

     /**
      * 上传视频（封装ContentService中上传视频和获取efs配置接口）
      *
      * @param $file_path 视频文件本地地址
      * @param $title 视频标题
      * @param $desc 视频描述
      * @param $video_type 视频类型
      * @param $shop_id 店铺Id
      * @return mixed
      * @throws BusinessException 业务异常
      */
     public function upload_video_client($file_path, $title, $desc, $video_type, $shop_id) {
         $file_extension = strtoupper(pathinfo(basename($file_path), PATHINFO_EXTENSION));

         if (!in_array($file_extension, $this -> file_ext_list)) {
             throw new BusinessException("只支持mp4和mov格式的视频");
         }

         if (filesize($file_path) > $this -> file_max_size * 1024 * 1024) {
             throw new BusinessException("视频大小不能超过200M");
         }
 }