tp 单张图片上传处理

public function modify_icon() {
        $this->act_data['modify_icon']['desc'] = "修改头像";
        //获取上传文件信息;
        $file = request()->file('file');
        $filePaths = ROOT_PATH . 'public' . DS . 'uploads';
        if (!file_exists($filePaths)) {
            mkdir($filePaths, 0777);
        }
        //单张图片上传
        $info = $file->move($filePaths);
        if (empty($info)) {
            $e = new user_exception();
            $e->seterror(843);
            throw $e;
        }
        $imgpath = ROOT_PATH . 'public' . DS . 'uploads/' . $info->getSaveName();
        //图片上传阿里云
        $dir = "person/head/" . date('y-m-d', time());
        $path = toolapp::toolOss($dir, $imgpath);

        if ($path['status'] == 1) {

            unset($info);//清除文件,非常重要;
             //插入数据库;
            Db::name(self::model_user)->where("f_user_id", $this->userinfo['f_user_id'])->update([
                'f_user_headicon' => $path['url']
            ]);
            //清除本地文件
            toolapp::del_dir($filePaths);

            Session::set("userinfo.f_user_headicon",toolapp::imgurl_aliyun($path['url']));

            //返回数据;
            return [
                      'msg' => '上传成功！',
                      'url' => toolapp::imgurl_aliyun($path['url'])
                   ];
        }else{
            $e = new user_exception();
            $e->seterror(607);
            throw $e;
        }
    }