think\File::error PHP Method

    private function error($errorNo)
    {
        switch ($errorNo) {
            case 1:
            case 2:
                $this->error = '上传文件大小超过了最大值！';
                break;
            case 3:
                $this->error = '文件只有部分被上传！';
                break;
            case 4:
                $this->error = '没有文件被上传！';
                break;
            case 6:
                $this->error = '找不到临时文件夹！';
                break;
            case 7:
                $this->error = '文件写入失败！';
                break;
            default:
                $this->error = '未知上传错误！';
        }
    }