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

<?php
namespace refill\jike;

class config
{
    const ORDER_URL = 'https://www.geexfinance.com/geex-point/api/tripartite/transactions/payMobile';
    const QUERY_URL = 'https://www.geexfinance.com/geex-point/api/tripartite/transactions/queryOrder';
    const BALANCE_URL = 'https://www.geexfinance.com/geex-point/api/tripartite/transactions/queryBalance';

    const APP_KEY = 'GLVw5NCOXfJogOR0I9';
    const APP_SECRET = 'yA9mOXslZV1YnD5hjBGvKo1PIPD7v8v8';
    const NOTIFY_URL = BASE_SITE_URL . "/mobile/callback/refill_jike.php";


    const ExtHeaders = ['Content-Type: application/json;charset=UTF-8'];

    public static function sign($params)
    {
        ksort($params);
        $content = '';
        foreach ($params as $key => $value) {
            if(self::check_empty($value) === false) {
                $content .= "{$key}={$value}&";
            }
        }
        $content .= 'appSecret='.config::APP_SECRET;
        return md5($content);
    }

    public static function check_empty($value)
    {
        if (!isset($value))
            return true;
        if ($value === null)
            return true;
        if (trim($value) === "")
            return true;

        return false;
    }
}