<?php
namespace app\api\error\model;
class Params extends  ZskkErrorModel {
    protected $code = 3000;
    protected $msg = '参数校验失败';
    protected $data = null;
    protected $error = null;
    private static $instance = null;

    public static function instance($code = 3000, $msg = '参数校验失败') {
        $instance = is_null(self::$instance) ? new Params() :self::$instance;
        return  $instance->setCode($code)->setMsg($msg);
    }
}