Omnipay\WechatPay\Message\DownloadBillRequest::post PHP Method

    private function post($url, $data = array(), $timeout = 3)
    {
        $ch = curl_init($url);
        curl_setopt($ch, CURLOPT_POST, true);
        curl_setopt($ch, CURLOPT_POSTFIELDS, Helper::array2xml($data));
        curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        $result = curl_exec($ch);
        if (preg_match('#return_code#', $result)) {
            $result = Helper::xml2array($result);
        } else {
            $result = array(['return_code' => 'SUCCESS', 'raw' => $result]);
        }
        return $result;
    }