php实现小程序支付完整版

微信(小程序)  /  管理员 发布于 7年前   208

本文实例为大家分享了php实现小程序支付的具体代码，供大家参考，具体内容如下

环境： tp3.2  + 小程序 微信支付功能开通

Step1:  下载PHP 支付SDK(下载地址)  放到Library\Vendor下，取名Wxpay           

修改WxPay.Config.php 里的appid appsecret key MCHID

Step2: 小程序 js 代码：

 var url = getApp().globalData.httpServer + 'api/buy/pay';    var userId = getApp().globalData.userId;    var totalMoney = this.data.totalMoney;    var cart = this.data.goods;    var param = {      cart: JSON.stringify(cart),      cartamount: totalMoney,      userid: userId,      payment: this.data.payment,      addressid: defaultAddress.id    };    var that = this;    util.http(url, param, function (ret) {      if (ret.data.code == 1) {        if (that.data.payment == 'balance') { // 余额支付          that.afterPaySuccess(ret.data.data);        } else {    // 微信支付          wx.requestPayment({timeStamp: ret.data.data.timeStamp,nonceStr: ret.data.data.nonceStr,package: ret.data.data.package,signType: ret.data.data.signType,paySign: ret.data.data.paySign,'success': function (res) {  that.afterPaySuccess(ret.data.data.orderid);},'fail': function (res) {  console.log(res);}          })        }       } else {        util.showTip(ret.data.msg, '提交订单失败');  }    });

/** * 网络请求 */function http(url, params, callback) {  wx.request({    url: url,    data: params,    success: function (res) {      callback(res);    },     fail: function (err) {      console.log(err);    }  });}

Step3: 接口代码：

  public function pay()  {    $cart = I('cart', '', 'trim');    $cartAmount = I('cartamount');    $addressId = I('addressid', 0, 'intval');    $payment = I('payment', '', 'trim');    $userId = $this->userid;     $cart = json_decode($cart, true);    if (empty($cart)) {      $result['msg'] = '购物车获取失败';      $result['code'] = 0;      $this->ajaxReturn($result);    }     $totalMoney = 0;    foreach ($cart as $goods) {      $money = $goods['price'];  // price      $selectCount = $goods['selectcount'];  // price      $itemAmount = number_format($money * $selectCount, 2, '.', '');      $totalMoney += $itemAmount;    }    // 检查总金额是否一致    if ($totalMoney != $cartAmount) {      $result['msg'] = '总金额不匹配:' . $totalMoney;      $result['code'] = 0;      $this->ajaxReturn($result);    }     // 获取用户地址    $address = M('MemberAddress')->where('userid=' . $userId . " and id=" . $addressId)->find();    if (empty($address)) {      $result['msg'] = '用户地址不存在';      $result['code'] = 0;      $this->ajaxReturn($result);    }     // 用户信息    $user = M('Member')->where("id=" . $userId)->find();    if ($payment == 'balance') {      if ($user['amount'] < $cartAmount) {        $result['msg'] = '余额不足';        $result['code'] = 0;        $this->ajaxReturn($result);      }    }     // 生成订单    $order['ordersn'] = $this->genOrdersn($user['id']);    $order['price'] = $cartAmount;    $order['addressid'] = $address['id'];    $order['addressinfo'] = serialize($address); //json_encode($address);    $order['longitude'] = $address['longitude'];    $order['latitude'] = $address['latitude'];    $order['addtime'] = time();    $order['status'] = 0;    $order['userid'] = $user['id'];    $order['paytype'] = $payment;    $order['paysn'] = '';    $order['paytime'] = time();    $orderId = M("Order")->add($order);    if ($orderId == 0) {      $result['msg'] = '创建订单失败';      $result['code'] = 0;      $this->ajaxReturn($result);    }    foreach ($cart as $goods) {      $orderGoods['orderid'] = $orderId;      $orderGoods['goodsid'] = $goods['id'];      $orderGoods['title'] = $goods['title'];      $orderGoods['price'] = $goods['price'];      $orderGoods['attr'] = $goods['attr'];      $orderGoods['pic'] = $goods['pic'];      $orderGoods['num'] = $goods['selectcount'];      M("OrderGoods")->add($orderGoods);    }     if ($payment == 'balance') {      // 余额支付      $this->balancePay($cartAmount, $user['wxopenid'], $orderId);    } else if ($payment == 'weixin') {      // 微信支付      $this->weixinPay($cartAmount, $user['wxopenid'], $orderId, $order['ordersn']);    }  }

  /**   * 微信支付   * @author 大脸猫脸大   * @param $cart   * @param $cartAmount   * @param $address   * @param $user   */  private function weixinPay($cartAmount, $openId, $orderId, $orderSn)  {     import("Vendor.Wxpay.lib.WxPay#Api", "", ".php");    //订单号    $money = $cartAmount * 100;    $openid = $openId;    $input = new \WxPayUnifiedOrder();    $input->SetBody("迪克-商品");    $input->SetOut_trade_no("$orderSn");    $input->SetTotal_fee("$money");    $input->SetNotify_url("https://" . $_SERVER['HTTP_HOST'] . "/api/buy/payNotify");    $input->SetTrade_type("JSAPI");    $input->SetOpenid($openid);    $unifiedOrder = \WxPayApi::unifiedOrder($input);     if ($unifiedOrder['result_code'] == 'SUCCESS' && $unifiedOrder['return_code'] == 'SUCCESS') {      $time = time();      $data['timeStamp'] = "$time";  //时间戳      $data['nonceStr'] = $unifiedOrder['nonce_str'];     //随机字符串      $data['signType'] = 'MD5';    //签名算法，暂支持 MD5      $data['package'] = 'prepay_id=' . $unifiedOrder['prepay_id'];  //统一下单接口返回的 prepay_id 参数值，提交格式如：prepay_id=*      $data['paySign'] = $this->genPaySign($unifiedOrder, $time);// 之前以为是$unifiedOrder['sign']; 后来发现是调用的这种方法. 签名方案参见微信公众号支付帮助文档;       $data['out_trade_no'] = $orderSn;       $data['orderid'] = $orderId;       $return['code'] = 1;       $return['data'] = $data;     } else {         Log::write(var_export($unifiedOrder, true), Log::ERR, '', C('LOG_PATH')."wx_pay_".date('y_m_d').'.log');         $return['code'] = 0;         $return['msg'] = '微信支付失败';// $unifiedOrder['RETURN_MSG'];     }     $this->ajaxReturn($return); }

/* 生成支付签名*/private function genPaySign($unifiedOrder, $time){  $appId = \WxPayConfig::APPID;  $nonceStr = $unifiedOrder['nonce_str'];  $package = 'prepay_id=' . $unifiedOrder['prepay_id'];  $signType = "MD5";  $timeStamp = $time;  $key = \WxPayConfig::KEY;  $sign = md5(sprintf("appId=%s&nonceStr=%s&package=%s&signType=%s&timeStamp=%s&key=%s", $appId, $nonceStr, $package, $signType, $timeStamp, $key));}

 /**   * 支付回调   * @author:大脸猫脸大   */  public function payNotify()  {    import("Vendor.Wxpay.lib.WxPay#Data", "", ".php");    $xml = $GLOBALS['HTTP_RAW_POST_DATA'];    $val = \WxPayResults::Init($xml);     if ($val['result_code'] == 'SUCCESS' && $val['return_code'] == 'SUCCESS') {       $orderSn = $val['out_trade_no'];      $transactionId = $val['transaction_id'];      $data = array('paytype' => 'weixin', 'status' => '1', 'paytime' => time(), 'paysn' => $transactionId);       M("Order")->where("ordersn='$orderSn'")->setField($data);      exit('');    }else {      Log::write(var_export($val, true), Log::ERR, '', C('LOG_PATH')."wx_pay_notify_".date('y_m_d').'.log');      exit('');    }}

payNotify 回调方法里一定要注意返回

复制代码 代码如下:

如果不处理，你会发现payNotify  会被执行很多次参见：官方文档

总结一下：

注意二点，1.签名的问题 2. 回调方法的返回处理。

欢迎大家指正。

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。

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