'请求成功', self::FAIL => '服务器异常', self::NOT_FOUND => '未找到资源', self::NOT_AUTH => '未授权', self::NOT_PERMISSION => '您没有权限', self::NOT_VALID => '字段验证失败', self::NOT_EXIST => '资源不存在', self::NOT_EXIST_OR_DELETED => '资源被删除', }; } }