public function platformDel($where) { $sql = "DELETE FROM trans_platform {$where}"; $query = $this->dbconn->query($sql); if ($query) { return $query; //成功, 返回列表数据 } else { self::$errCode = "003"; self::$errMsg = "444444444"; return false; //失败则设置错误码和错误信息, 返回false } }