PHP小程序支付功能完整版【基于thinkPHP】


						本文实例讲述了PHP小程序支付功能。分享给大家供大家参考，具体如下：

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("http://" . $_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));

    return $sign;

}

/**

* 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('<xml><return_code><![CDATA[SUCCESS]]></return_code><return_msg><![CDATA[OK]]></return_msg></xml>');

    }else {

      Log::write(var_export($val, true), Log::ERR, '', C('LOG_PATH')."wx_pay_notify_".date('y_m_d').'.log');

      exit('<xml><return_code><![CDATA[FAIL]]></return_code><return_msg><![CDATA[OK]]></return_msg></xml>');

    }

}







payNotify 回调方法里一定要注意返回



<xml><return_code><![CDATA[SUCCESS]]></return_code><return_msg><![CDATA[OK]]></return_msg></xml>



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。

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