xyzshop/helper/refill/api/xyz/quanzhen/config.php

<?php
namespace refill\quanzhen;

class config
{
    const ORDER_URL = 'http://payapi.eyunpay.com/open/api/jy/recharge';
    const QUERY_URL = 'http://payapi.eyunpay.com/open/api/jy/query';
    const BALANCE_URL = 'http://payapi.eyunpay.com/open/api/jy/queryFee';

    const APP_ID = 'WP1680594711360';
    const APP_KEY = 'Gt0bsHq0YWP3SlsXOnPLorok2QEPHjAA';
    const NOTIFY_URL = BASE_SITE_URL . "/mobile/callback/refill_quanzhen.php";

    const ExtHeaders = ['Content-Type: application/json'];

    public static function sign($params)
    {
        ksort($params);
        $content = '';
        foreach ($params as $key => $value) {
            $content .= "{$key}={$value}&";
        }
        $content .= 'key='.config::APP_KEY;
        return md5($content);
    }
}