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

<?php

namespace refill\bailian;

use mtopcard;

class config
{
    const ORDER_URL = 'http://101.37.252.250/cg/api/Owned/Charge';
    const QUERY_URL = 'http://101.37.252.250/cg/api/Owned/Query';
    const BALANCE_URL = 'http://101.37.252.250/cg/api/MacInfo/Balance';

    const MAC_ID = '1646476170480002';
    const KEY = 'ffcb6768ad0a8b631acd29355a31b50d';
    const NOTIFY_URL = BASE_SITE_URL . "/mobile/callback/refill_bailian.php";
    const PRODUCT = [
        mtopcard\SinopecCard => [
            500 => 100004,
            1000 => 100005
        ]
    ];
    const ExtHeaders = ['Content-Type:application/x-www-form-urlencoded;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}";
            }
        }
        $content .= config::KEY;
        return md5($content);
    }

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

        return false;
    }
}