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

<?php
namespace refill\weisanhuo;

use mtopcard;
class config
{
    const ORDER_URL = 'http://124.70.69.117:50050/api/v1/rest/multi/charge/single';
    const QUERY_URL = 'http://124.70.69.117:50050/api/v1/rest/multi/charge/report/query';
    const BALANCE_URL = 'http://124.70.69.117:50050/api/v1/rest/multi/charge/balance';

    const SECRET_ID = '231c9717118f4413b1611a3a87221795';
    const SECRET_KEY = '0109d2f30b414832a0f1e8c29720eff3';
    const NOTIFY_URL = BASE_SITE_URL . "/mobile/callback/refill_weisanhuo.php";
    const ExtHeaders = ['Content-Type: application/json;charset=UTF-8'];

    const ProductIdS = [
        mtopcard\ChinaMobileCard =>
            [
                30 => 'k-yd-30',
                50 => 'k-yd-50',
                100 => 'k-yd-100',
                200 => 'k-yd-200',
                300 => 'k-yd-300',
                500 => 'k-yd-500'
            ],
        mtopcard\ChinaUnicomCard =>
            [
                30 => 'k-lt-30',
                50 => 'k-lt-50',
                100 => 'k-lt-100',
                200 => 'k-lt-200'
            ],
        mtopcard\ChinaTelecomCard =>
            [
                30 => 'k-dx-30',
                50 => 'k-dx-50',
                100 => 'k-dx-100',
                200 => 'k-dx-200'
            ]
    ];

    public static function sign(array $params, array $ignore = []): string
    {
        ksort($params);
        $content = '';
        foreach ($params as $key => $value) {
            if (in_array($key, $ignore)) {
                continue;
            }

            if(self::check_empty($value) === false) {
                $key = strtolower($key);
                $value = urlencode($value);
                $content .= "$key=$value&";
            }
        }
        $content .= "secretkey=" . config::SECRET_KEY;
        return md5($content);
    }

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

        return false;
    }
}