/**
* 生成要请求给支付宝的参数数组
* @param $para_temp 请求前的参数数组
* @return 要请求的参数数组字符串
*/
private function buildRequestParaToString($para_temp)
{
//待请求参数数组
$para = $this->buildRequestPara($para_temp);
//把参数组中所有元素，按照“参数=参数值”的模式用“&”字符拼接成字符串，并对字符串做urlencode编码
$request_data = EasyHelpers::createLinkstring($para, true);
return $request_data;
}
/**
* 生成签名;
* @param array $data
* @return string
*/
private static function sign($data = [])
{
$params = $data ?: self::$config;
$fileter = EasyHelpers::paraFilter($params);
$sort = EasyHelpers::argSort($fileter);
$url = EasyHelpers::createLinkstring($sort);
$keyString = $url . '&key=' . \Yii::$app->params['wechatPay']['key'];
$sign = strtoupper(md5($keyString));
self::$config['sign'] = $sign;
return $sign;
}
