guochanhua/server/application/api/error/model/Cros.php

<?php
namespace app\api\error\model;
class Cros extends  ZskkErrorModel {
    protected $code = 1001;
    protected $msg = 'OPTIONS请求校验成功';
    protected $data = null;
    protected $error = null;
    private static $instance = null;

    public static function instance() {
        if(is_null(self::$instance)){
            return new Cros();
        }
        return self::$instance;
    }
}