function create_native_url($productid)
{
$commonUtil = new CommonUtil();
$nativeObj["appid"] = $this->appid;
$nativeObj["productid"] = urlencode($productid);
$nativeObj["timestamp"] = time();
$nativeObj["noncestr"] = $this->create_noncestr();
$nativeObj["sign"] = $this->get_biz_sign($nativeObj);
$bizString = $commonUtil->formatBizQueryParaMap($nativeObj, false);
return "weixin://wxpay/bizpayurl?" . $bizString;
}
