BaseConstant.php

<?php

namespace api\base;

class BaseConstant
{
    const ERROR = 'error';
    const MSG = 'msg';
    const MESSAGE = 'message';
    const CODE = 'code';
    const VAL = 'val';
    const DATA = 'data';
    const OK = 'ok';
    const FINALTAG = 'finaltag';
}