PHP小程序支付功能完整版【基于thinkPHP】_PHP教程

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("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));

									    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>');

									    }

									}