//总金额
$unifiedOrder->setParameter("notify_url", WxPayConf::NOTIFY_URL);
//通知地址
$unifiedOrder->setParameter("trade_type", "NATIVE");
//交易类型
//非必填参数，商户可根据实际情况选填
//$unifiedOrder->setParameter("sub_mch_id","XXXX");//子商户号
//$unifiedOrder->setParameter("device_info","XXXX");//设备号
//$unifiedOrder->setParameter("attach","XXXX");//附加数据
//$unifiedOrder->setParameter("time_start","XXXX");//交易起始时间
//$unifiedOrder->setParameter("time_expire","XXXX");//交易结束时间
//$unifiedOrder->setParameter("goods_tag","XXXX");//商品标记
//$unifiedOrder->setParameter("openid","XXXX");//用户标识
//$unifiedOrder->setParameter("product_id","$product_id");//用户标识
//获取prepay_id
$prepay_id = $unifiedOrder->getPrepayId();
//设置返回码
//设置必填参数
//appid已填,商户无需重复填写
//mch_id已填,商户无需重复填写
//noncestr已填,商户无需重复填写
//sign已填,商户无需重复填写
$nativeCall->setReturnParameter("return_code", "SUCCESS");
//返回状态码
$nativeCall->setReturnParameter("result_code", "SUCCESS");
//业务结果
$nativeCall->setReturnParameter("prepay_id", "{$prepay_id}");
//预支付ID
break;
default:
//设置返回码
