PHP小程序支付功能完整版【基于thinkPHP】

更新时间：2020-04-03 22:53:22 作者：startmvc

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

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>');
 }
}

payNotify 回调方法里一定要注意返回