PFinal\Wechat\SDK\Redpack\Helper::get_sign PHP Method

    protected function get_sign()
    {
        try {
            if (null == $this->apiSecret || "" == $this->apiSecret) {
                throw new SDKRuntimeException("密钥不能为空！" . "<br>");
            }
            if ($this->check_sign_parameters() == false) {
                //检查生成签名参数
                throw new SDKRuntimeException("生成签名参数缺失！" . "<br>");
            }
            $commonUtil = new CommonUtil();
            ksort($this->parameters);
            $unSignParaString = $commonUtil->formatQueryParaMap($this->parameters, false);
            $md5SignUtil = new MD5SignUtil();
            return $md5SignUtil->sign($unSignParaString, $commonUtil->trimString($this->apiSecret));
        } catch (SDKRuntimeException $e) {
            die($e->errorMessage());
        }
    }