本文實例為大家分享了php實現小程序支付的具體代碼，供大家參考，具體內容如下

環境： tp3.2 ?+ 小程序 微信支付功能開通

Step1:下載PHP 支付SDK(下載地址) ?放到Library\Vendor下，取名Wxpay

修改WxPay.Config.php 里的appid appsecret key?MCHID

Step2:小程序 js 代碼：

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') { // 余額支付

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, '提交訂單失敗');

}

});

/**

* 網絡請求

*/

function http(url, params, callback) {

wx.request({

url: url,

data: params,

success: function (res) {

callback(res);

},

fail: function (err) {

console.log(err);

}

});

}

Step3:接口代碼：

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'] = '購物車獲取失敗';

$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;

}

// 檢查總金額是否一致

if ($totalMoney != $cartAmount) {

$result['msg'] = '總金額不匹配:' . $totalMoney;

$result['code'] = 0;

$this->ajaxReturn($result);

}

// 獲取用戶地址

$address = M('MemberAddress')->where('userid=' . $userId . " and id=" . $addressId)->find();

if (empty($address)) {

$result['msg'] = '用戶地址不存在';

$result['code'] = 0;

$this->ajaxReturn($result);

}

// 用戶信息

$user = M('Member')->where("id=" . $userId)->find();

if ($payment == 'balance') {

if ($user['amount'] < $cartAmount) {

$result['msg'] = '余額不足';

$result['code'] = 0;

$this->ajaxReturn($result);

}

}

// 生成訂單

$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'] = '創建訂單失敗';

$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') {

// 余額支付

$this->balancePay($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 大臉貓臉大

* @param $cart

* @param $cartAmount

* @param $address

* @param $user

*/

private function weixinPay($cartAmount, $openId, $orderId, $orderSn)

{

import("Vendor.Wxpay.lib.WxPay#Api", "", ".php");

//訂單號

$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"; //時間戳

$data['nonceStr'] = $unifiedOrder['nonce_str']; //隨機字符串

$data['signType'] = 'MD5'; //簽名算法，暫支持 MD5

$data['package'] = 'prepay_id=' . $unifiedOrder['prepay_id']; //統一下單接口返回的 prepay_id 參數值，提交格式如：prepay_id=*

$data['paySign'] = $this->genPaySign($unifiedOrder, $time);// 之前以為是$unifiedOrder['sign']; 后來發現是調用的這種方法. 簽名方案參見微信公眾號支付幫助文檔;

$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'] = '微信支付失敗';// $unifiedOrder['RETURN_MSG'];

}

$this->ajaxReturn($return);

}

/* 生成支付簽名*/

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));

}

/**

* 支付回調

* @author:大臉貓臉大

*/

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 回調方法里一定要注意返回

如果不處理，你會發現payNotify ?會被執行很多次參見：官方文檔

總結一下：

注意二點，1.簽名的問題 2. 回調方法的返回處理。

歡迎大家指正。

以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持腳本之家。

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