微信支付jsapi并写入数据库--回调函数（notify.php）的使用

调用链接
http://2019.weiqingdao.cn/apps/enter/web/wei_ceshi/00ceshi/008/zhifu.php?goods_id=45&num=2

<?php
header('Content-type:text/html; Charset=utf-8');
session_start();
require './php/connect.php';
$params = array(// 系统参数"mchid" => '',          //微信支付商户号 PartnerID 通过微信支付商户资料审核后邮件发送"appid" => '',  //微信支付申请对应的公众号的APPID"appKey" => '',   //微信支付申请对应的公众号的APP Key"apiKey" => '',   //https://pay.weixin.qq.com 帐户设置-安全设置-API安全-API密钥-设置API密钥// 订单信息"outTradeNo" => date("YmdHis") . str_pad(mt_rand(0, 99999), 5, 0, STR_PAD_LEFT), //你自己的商品订单号"payAmount" => 0.01, //付款金额，单位:元"orderName" => 'zhifu',   //订单标题"notifyUrl" => '.链接地址./notify.php',     //付款成功后的回调地址(不要有问号)"payTime" => time(),    //付款时间// sql信息'goods_id' => 45, //商品id'num' => 1, //数量'user_id' => 0 //购买人id
);
// 更改参数，也可以直接使用定义的，不过实际上根据商品信息和传递的参数生成数据
$params['goods_id'] = isset($_GET['goods_id']) ? $_GET['goods_id'] : 45;
$params['num'] = isset($_GET['num']) ? $_GET['num'] : 2;
$params['user_id'] = $pdo->query("SELECT id FROM a_user WHERE phone='{$_SESSION['phone']}' and password='{$_SESSION['password']}'")->fetch(PDO::FETCH_ASSOC)['id'];
$params['user_id'] = $params['user_id'] ? $params['user_id'] : 0;
$params['payTime'] = date("Y-m-d H:i:s", $params['payTime']);
$paramsres = $pdo->query("SELECT price,title from a_book_info where info_id={$params['goods_id']}")->fetch(PDO::FETCH_ASSOC);
$params['payAmount'] = $paramsres['price'] * $params['num'];
$params['orderName'] = $paramsres['title'];
print_r('<pre>', $params);//①、获取用户openid
$wxPay = new WxpayService($params["mchid"], $params["appid"], $params["appKey"], $params["apiKey"]);
$openId = $wxPay->GetOpenid();      //获取openid
if (!$openId) exit('获取openid失败');//②、统一下单
$jsApiParameters = $wxPay->createJsBizPackage($openId, $params['payAmount'], $params['outTradeNo'], $params['orderName'], $params['notifyUrl'], $params['payTime']); //下单
$jsApiParameters = json_encode($jsApiParameters);// ③下单sql
$sql = "INSERT INTO `a_buy`(open_id ,  `payAmount`,outTradeNo, `orderName`, `status`,info_id,xd_id,payTime )
VALUES ('$openId', {$params['payAmount']},'{$params['outTradeNo']}','{$params['orderName']}','待付款',{$params['goods_id']},{$params['user_id']},'{$params['payTime']}')";
$res = $pdo->exec($sql);
var_dump($res);
var_dump($sql);?><html><head><meta charset="utf-8" /><meta name="viewport" content="width=device-width, initial-scale=1" /><title>微信支付样例-支付</title><script type="text/javascript">//调用微信JS api 支付function jsApiCall() {WeixinJSBridge.invoke('getBrandWCPayRequest',<?php echo $jsApiParameters; ?>,function(res) {WeixinJSBridge.log(res.err_msg);if (res.err_msg == 'get_brand_wcpay_request:ok') {alert("支付成功");window.history.back()} else {alert('支付失败：' + res.err_code + res.err_desc + res.err_msg);}});}if (typeof WeixinJSBridge == "undefined") {if (document.addEventListener) {document.addEventListener('WeixinJSBridgeReady', jsApiCall, false);} else if (document.attachEvent) {document.attachEvent('WeixinJSBridgeReady', jsApiCall);document.attachEvent('onWeixinJSBridgeReady', jsApiCall);}} else {jsApiCall();}</script>
</head></html>
<?php
class WxpayService
{protected $mchid;protected $appid;protected $appKey;protected $apiKey;public $data = null;public function __construct($mchid, $appid, $appKey, $key){$this->mchid = $mchid; //https://pay.weixin.qq.com 产品中心-开发配置-商户号$this->appid = $appid; //微信支付申请对应的公众号的APPID$this->appKey = $appKey; //微信支付申请对应的公众号的APP Key$this->apiKey = $key;   //https://pay.weixin.qq.com 帐户设置-安全设置-API安全-API密钥-设置API密钥}/*** 通过跳转获取用户的openid，跳转流程如下：* 1、设置自己需要调回的url及其其他参数，跳转到微信服务器https://open.weixin.qq.com/connect/oauth2/authorize* 2、微信服务处理完成之后会跳转回用户redirect_uri地址，此时会带上一些参数，如：code* @return 用户的openid*/public function GetOpenid(){//通过code获得openidif (!isset($_GET['code'])) {//触发微信返回code码$scheme = $_SERVER['HTTPS'] == 'on' ? 'https://' : 'http://';$uri = $_SERVER['PHP_SELF'] . $_SERVER['QUERY_STRING'];if ($_SERVER['REQUEST_URI']) $uri = $_SERVER['REQUEST_URI'];$baseUrl = urlencode($scheme . $_SERVER['HTTP_HOST'] . $uri); // 例如：https://www.baidu.com/s?ie=UTF-8&wd=$_SERVER%5B%27QUERY_STRING%27%5D$url = $this->__CreateOauthUrlForCode($baseUrl);Header("Location: $url");exit();} else {//获取code码，以获取openid$code = $_GET['code'];$openid = $this->getOpenidFromMp($code);return $openid;}}/*** 通过code从工作平台获取openid机器access_token* @param string $code 微信跳转回来带上的code* @return openid*/public function GetOpenidFromMp($code){$url = $this->__CreateOauthUrlForOpenid($code);$res = self::curlGet($url);//取出openid$data = json_decode($res, true);$this->data = $data;$openid = $data['openid'];return $openid;}/*** 构造获取open和access_toke的url地址* @param string $code，微信跳转带回的code* @return 请求的url*/private function __CreateOauthUrlForOpenid($code){$urlObj["appid"] = $this->appid;$urlObj["secret"] = $this->appKey;$urlObj["code"] = $code;$urlObj["grant_type"] = "authorization_code";$bizString = $this->ToUrlParams($urlObj);return "https://api.weixin.qq.com/sns/oauth2/access_token?" . $bizString;}/*** 构造获取code的url连接* @param string $redirectUrl 微信服务器回跳的url，需要url编码* @return 返回构造好的url*/private function __CreateOauthUrlForCode($redirectUrl){$urlObj["appid"] = $this->appid;$urlObj["redirect_uri"] = "$redirectUrl";$urlObj["response_type"] = "code";$urlObj["scope"] = "snsapi_base";$urlObj["state"] = "STATE" . "#wechat_redirect";$bizString = $this->ToUrlParams($urlObj);return "https://open.weixin.qq.com/connect/oauth2/authorize?" . $bizString;}/*** 拼接签名字符串* @param array $urlObj* @return 返回已经拼接好的字符串*/private function ToUrlParams($urlObj){$buff = "";foreach ($urlObj as $k => $v) {if ($k != "sign") $buff .= $k . "=" . $v . "&";}$buff = trim($buff, "&");return $buff;}/*** 统一下单* @param string $openid 调用【网页授权获取用户信息】接口获取到用户在该公众号下的Openid* @param float $totalFee 收款总费用 单位元* @param string $outTradeNo 唯一的订单号* @param string $orderName 订单名称* @param string $notifyUrl 支付结果通知url 不要有问号* @param string $timestamp 支付时间* @return string*/public function createJsBizPackage($openid, $totalFee, $outTradeNo, $orderName, $notifyUrl, $timestamp){$config = array('mch_id' => $this->mchid,'appid' => $this->appid,'key' => $this->apiKey,);//$orderName = iconv('GBK','UTF-8',$orderName);$unified = array('appid' => $config['appid'],'attach' => 'pay',             //商家数据包，原样返回，如果填写中文，请注意转换为utf-8'body' => $orderName,'mch_id' => $config['mch_id'],'nonce_str' => self::createNonceStr(),'notify_url' => $notifyUrl,'openid' => $openid,            //rade_type=JSAPI，此参数必传'out_trade_no' => $outTradeNo,'spbill_create_ip' => '127.0.0.1','total_fee' => intval($totalFee * 100),       //单位 转为分'trade_type' => 'JSAPI',);$unified['sign'] = self::getSign($unified, $config['key']);$responseXml = self::curlPost('https://api.mch.weixin.qq.com/pay/unifiedorder', self::arrayToXml($unified));//禁止引用外部xml实体libxml_disable_entity_loader(true);$unifiedOrder = simplexml_load_string($responseXml, 'SimpleXMLElement', LIBXML_NOCDATA);if ($unifiedOrder === false) {die('parse xml error');}if ($unifiedOrder->return_code != 'SUCCESS') {die($unifiedOrder->return_msg);}if ($unifiedOrder->result_code != 'SUCCESS') {die($unifiedOrder->err_code);}$arr = array("appId" => $config['appid'],"timeStamp" => "$timestamp",        //这里是字符串的时间戳，不是int，所以需加引号"nonceStr" => self::createNonceStr(),"package" => "prepay_id=" . $unifiedOrder->prepay_id,"signType" => 'MD5',);$arr['paySign'] = self::getSign($arr, $config['key']);return $arr;}public static function curlGet($url = '', $options = array()){$ch = curl_init($url);curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);curl_setopt($ch, CURLOPT_TIMEOUT, 30);if (!empty($options)) {curl_setopt_array($ch, $options);}//https请求 不验证证书和hostcurl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);$data = curl_exec($ch);curl_close($ch);return $data;}public static function curlPost($url = '', $postData = '', $options = array()){if (is_array($postData)) {$postData = http_build_query($postData);}$ch = curl_init();curl_setopt($ch, CURLOPT_URL, $url);curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);curl_setopt($ch, CURLOPT_POST, 1);curl_setopt($ch, CURLOPT_POSTFIELDS, $postData);curl_setopt($ch, CURLOPT_TIMEOUT, 30); //设置cURL允许执行的最长秒数if (!empty($options)) {curl_setopt_array($ch, $options);}//https请求 不验证证书和hostcurl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);$data = curl_exec($ch);curl_close($ch);return $data;}public static function createNonceStr($length = 16){$chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';$str = '';for ($i = 0; $i < $length; $i++) {$str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);}return $str;}public static function arrayToXml($arr){$xml = "<xml>";foreach ($arr as $key => $val) {if (is_numeric($val)) {$xml .= "<" . $key . ">" . $val . "</" . $key . ">";} else$xml .= "<" . $key . "><![CDATA[" . $val . "]]></" . $key . ">";}$xml .= "</xml>";return $xml;}public static function getSign($params, $key){ksort($params, SORT_STRING);$unSignParaString = self::formatQueryParaMap($params, false);$signStr = strtoupper(md5($unSignParaString . "&key=" . $key));return $signStr;}protected static function formatQueryParaMap($paraMap, $urlEncode = false){$buff = "";ksort($paraMap);foreach ($paraMap as $k => $v) {if (null != $v && "null" != $v) {if ($urlEncode) {$v = urlencode($v);}$buff .= $k . "=" . $v . "&";}}$reqPar = '';if (strlen($buff) > 0) {$reqPar = substr($buff, 0, strlen($buff) - 1);}return $reqPar;}
}

<?php
require './php/connect.php';$info = file_get_contents("php://input");
$order = xmlToArray($info);
$trade['order'] = $order['out_trade_no'];   /* 微信分配的小程序ID,即订单号 */
$trade["total_fee"] = $order["total_fee"];    /* 金额 */
$trade["sign"] = $order["sign"];    /* 签名 */
// https://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=9_7&index=8// // 3，针对信息做处理，
// // 3.1根据返回的信息在生成签名防止数据泄漏导致出现“假通知”，造成资金损失。
$newSign = verifySign($order);
// // 3.2根据订单id去数据库或者换成查找订单消息
$data = $pdo->query("SELECT payAmount,status from a_buy WHERE outTradeNo='{$trade['order']}'")->fetch(PDO::FETCH_ASSOC); //需要注意单位为分if (($data['payAmount'] * 100) == $trade['total_fee'] && $newSign == $trade["sign"]) {if ($data['status'] == '待付款') {// 更改订单状态$pdo->exec("UPDATE a_buy set status='待发货'  WHERE outTradeNo='{$trade['order']}'");logInfo($info); //写入日志}return'<xml><return_code><![CDATA[SUCCESS]]></return_code><return_msg><![CDATA[OK]]></return_msg></xml>';var_dump($data);
} else {// 失败的请求
}// 将xml装换为数组
function xmlToArray($data)
{return  (array)simplexml_load_string($data, 'SimpleXMLElement', LIBXML_NOCDATA);
}
// 将付款成功后的数据写入log 日志文件
function logInfo($info, $fileName = 'log')
{$debugInfo = debug_backtrace();$message = date("Y-m-d H-i-s") . PHP_EOL . $info . PHP_EOL;;$message .= '[' . $debugInfo[0]['file'] . ']' . 'line' . $debugInfo[0]["line"] . PHP_EOL;file_put_contents($fileName . '-' . date("Y-m-d") . '.log', $message, FILE_APPEND);
}
// 判断返回的签名和根据数据生成的数据判断是否相同，防止数据泄漏导致出现“假通知”，造成资金损失。
function verifySign($params, $apikey = "c17FZND q71Tt9")
{ksort($params);$string = "";foreach ($params as $k => $v) {if ($k != "sign" && $v != "" && !is_array($v)) {$string .= $k . "=" . $v . "&";}}$string = $string . "key=" . $apikey;$string = md5($string);$result = strtoupper($string);return $result;
}

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