Laravel8+微信小程序接入微信支付案例

2021-10-26 阅读：2913 类型：后端分类：微信小程序标签：微信小程序 PHP Laravel

一、服务端逻辑：服务端使用jsApi支付生成预支付订单，返回给前端，使用的微信支付v2版本

1.1、下载官方sdk，也可用这个，经过博主修改的laravel版的：https://www.aliyundrive.com/s/mf1jnwagKuk

1.2 、将下载好的微信支付sdk放置到vendor目录下。

1.3 、在订单控制器OrderController引入我们的微信支付sdk

require_once "../vendor/wxpaysdk/lib/WxPay.Api.php";
require_once "../vendor/wxpaysdk/lib/WxPay.NativePay.php";
require_once "../vendor/wxpaysdk/lib/phpqrcode/phpqrcode.php";
require_once "../vendor/wxpaysdk/lib/WxPay.JsApiPay.php";
require_once "../vendor/wxpaysdk/lib/WxPay.Config.php";
require_once "../vendor/wxpaysdk/lib/WxPay.Notify.php";

1.4、生成预支付订单方法

public function order_create(Request $request){
       $data = [
           'goods_id'=>$request->goods_id,
           'name'=>$request->name,
           'mobile'=>$request->mobile,
           'goods_money'=>$request->goods_money,
           'member_id'=>$request->member_id,
           'openid'=>$request->openid,
           'nickName'=>$request->nickName,
           'avatar'=>$request->avatar,
           'order_no'=>date('Ymd'). substr(implode(NULL, array_map('ord', str_split(substr(uniqid(),
                   7, 13), 1))), 0, 8),
           'create_time'=>time(),
       ];
       $res =Order::create($data);
       $id = $res->id;
       //根据id查询订单
       $order = Order::where(array('id'=>$id))->first();
       try{
             //调起微信支付jsApi接口
             $tools = new \JsApiPay();
             $openId =$request->openid;
             //②、统一下单
             $input = new \WxPayUnifiedOrder();
             $input->SetBody($request->goods_name); //商品名称
             $input->SetAttach("test");
             $input->SetOut_trade_no($order->order_no);
             $input->SetTotal_fee((string)($request->goods_money*100));
             $input->SetTime_start(date("YmdHis",$order->create_time)); //SetTime_start 设置订单生成时间，格式为yyyyMMddHHmmss */
             $input->SetTime_expire(date("YmdHis", $order->create_time + 1800)); //SetTime_expire 设置订单失效时间，格式为yyyyMMddHHmmss */
             $input->SetGoods_tag("test"); //SetGoods_tag 设置商品标记，代金券或立减优惠功能的参数 */
             $input->SetNotify_url("https://shop.example.com/weixin/order_pay_notify");
             $input->SetTrade_type("JSAPI");
             $input->SetOpenid($openId);
             $config = new \WxPayConfig();
             $orderRes = \WxPayApi::unifiedOrder($config, $input);
 
             $resjsApiParameters = $tools->GetJsApiParameters($orderRes);
             $resultData= json_decode($resjsApiParameters,true);
 
    }catch(Exception $e) {
                    Log::channel('payerr')->debug(json_encode($e));
             }
 
      if($res){
           return $this->jsonData(ApiErrDesc::SUCCESS[0],ApiErrDesc::SUCCESS[1],$resultData);
       }else{
           return $this->jsonData(ApiErrDesc::ERROR[0],ApiErrDesc::ERROR[1],'');
       }
	}

1.5 支付回调：更新订单状态

/*
 * 支付回调
 * */
public function order_pay_notify(Request $request){
      $post= file_get_contents("php://input");
      libxml_disable_entity_loader(true); //禁止引用外部xml实体
      $xml = simplexml_load_string($post, 'SimpleXMLElement', LIBXML_NOCDATA);//XML转数组
      $post_data = (array)$xml;
      Log::channel('pay')->debug($post_data);
 
      if($post_data){
             if($post_data['return_code'] == 'SUCCESS' && $post_data['result_code'] == 'SUCCESS'){
                     $data=[
                           'out_trade_no'=>$post_data['transaction_id'],
                           'pay_time'=>strtotime($post_data['time_end']),
                           'pay_status'=>1,
                    ];
                    $updateOrder = Order::where(array('order_no'=>$post_data['out_trade_no']))->update($data);
                    if($updateOrder){
                           //阻止微信接口反复回调接口 文档地址 https://pay.weixin.qq.com/wiki/doc/api/H5.php?chapter=9_7&index=7，下面这句非常重要!!!
                           echo '<xml> <return_code><![CDATA[SUCCESS]]></return_code> <return_msg><![CDATA[OK]]></return_msg> </xml>';
                           exit('Notify 非法回调');
                    }
             }
      }
 
}

二、小程序前端：wx.requestPayment(Object object)

详细文档：https://developers.weixin.qq.com/miniprogram/dev/api/payment/wx.requestPayment.html

request({
 url: '/weixin/order_create',
 data:{
      goods_id: this.data.pay_detail.id,
      goods_name: this.data.pay_detail.goods_name,
      name: e.detail.value.name,
      mobile: e.detail.value.mobile,
      mobile: e.detail.value.remarks,
      goods_money: this.data.pay_detail.goods_price,
      member_id: this.data.userInfo.id,
      openid: this.data.userInfo.openid,
      nickName: this.data.userInfo.nickName,
      avatar: this.data.userInfo.avatar,
 },
 method: 'POST',
}).then(result=>{
 if(result.data.code==200){
      console.log(result.data.data)
      wx.requestPayment({
       timeStamp: result.data.data.timeStamp, //随机字符串，长度为32个字符以下
       nonceStr: result.data.data.nonceStr,
       package: result.data.data.package, //统一下单接口返回的 prepay_id 参数值，提交格式如：prepay_id=***
       signType: result.data.data.signType,
       paySign: result.data.data.paySign, //签名算法，应与后台下单时的值一致
       success (res) {
             console.log(res)
        },
       fail (res) {
             console.log(res)
        }
      })
 }else{
      wx.showToast({
       title: '网络错误',
       duration: 2000,
       icon: 'none'
      });
 }
})