一、前言
为何我还写一篇微信支付接口的博文呢?第一,我们必须知道,所谓的工作经验很多都是靠总结出来的,你只有总结了更多知识,积累了更多经验,你才能在该行业中脱颖而出,我个人觉得如今的招聘,很多都需要工作经验(1年、3年、5年....),其实,工作时间的长久不能衡量一个人技术水平的高低,有的人一年的工作经验能拿3年工作经验的程序猿的工资,有的3年工作经验的却有可能比别人只有一年工作经验的还低,所以说,总结才能让自己的知识体系,经验深度更牛逼更稳固(虽然写一篇博文挺花费时间的);第二,写博文分享给大家还是挺有成就感的,首先是能让新手从我分享的博文中能学到东西,并且能快速将博文所讲解的技术运用到实际中来,所以我写的博文基本上能让新人快速读懂并且容易理解,另外,技术大神的话,看到博文有讲解的不对之处,还可以指出,并且可以交流,何乐而不为呢,我们需要的就是分享和交流。
扯远了,直接进入该主题的详解。
现在的微信支付方式有N种,看下图,有刷卡支付、公众号支付、扫码支付和APP支付,另外还有支付工具的开发,本博文选择的是公众号支付借口而开发进行讲解,其他几种支付接口开发基本上思路都是一样的,只要你能看懂我这博文所讲解的基本思路,你基本上也能独自开发其他几个支付接口。
三、代码讲解
本次开发环境用的是php5.6 + MySQL + Redis + Linux + Apache,所选用的框架的CI框架(这些环境不一定需要和我的一致,框架也可以自己选择,反正自己稍微修改下代码就能移植过去了)。
微信支付接口的开发代码我已经提前写好了,在这里我对其进行分析讲解,方便大家能轻松理解,当然,假如你有一定的基础,直接看代码就能理清所有流程了,并且我的代码基本上都写上了注释(对于新手来说,这一点比微信文档所提供的代码好一点)。
1、构造一个链接展示给用户
这里我们提前需要知道一个点,那就是请求统一下单接口需要微信用户的openid(详情可看这https://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=9_1),而获取openid需要先获取code(详情可看这微信登录接口),所以我们需要构造一个获取code的URL:
Wxpay.php文件: load->model('wxpay_model'); //$this->load->model('wxpay'); } public function index() { //微信支付 $this->smarty['wxPayUrl'] = $this->wxpay_model->retWxPayUrl(); $this->displayView('wxpay/index.tpl'); } }
在这先看看model里所写的几个类:model里有几个类:微信支付类、统一下单接口类、响应型接口基类、请求型接口基类、所有接口基类、配置类。为何要分那么多类而不在一个类里实现所有的方法的,因为,这样看起来代码逻辑清晰,哪个类该干嘛就干嘛。
这里我直接附上model的代码了,里面基本上每一个类每一个方法甚至每一行代码都会有解释的了,这里我就不对其展开一句句分析了:
createOauthUrlForCode(); } /** * 微信jsapi点击支付 * @param [type] $data [description] * @return [type] [description] */ public function wxPayJsApi($data) { $jsApi = new JsApi_handle(); //统一下单接口所需数据 $payData = $this->returnData($data); //获取code码,用以获取openid $code = $_GET[&#39;code&#39;]; $jsApi->setCode($code); //通过code获取openid $openid = $jsApi->getOpenId(); $unifiedOrderResult = null; if ($openid != null) { //取得统一下单接口返回的数据 $unifiedOrderResult = $this->getResult($payData, &#39;JSAPI&#39;, $openid); //获取订单接口状态 $returnMessage = $this->returnMessage($unifiedOrder, &#39;prepay_id&#39;); if ($returnMessage[&#39;resultCode&#39;]) { $jsApi->setPrepayId($retuenMessage[&#39;resultField&#39;]); //取得wxjsapi接口所需要的数据 $returnMessage[&#39;resultData&#39;] = $jsApi->getParams(); } return $returnMessage; } } /** * 统一下单接口所需要的数据 * @param [type] $data [description] * @return [type] [description] */ public function returnData($data) { $payData[&#39;sn&#39;] = $data[&#39;sn&#39;]; $payData[&#39;body&#39;] = $data[&#39;goods_name&#39;]; $payData[&#39;out_trade_no&#39;] = $data[&#39;order_no&#39;]; $payData[&#39;total_fee&#39;] = $data[&#39;fee&#39;]; $payData[&#39;attach&#39;] = $data[&#39;attach&#39;]; return $payData; } /** * 返回统一下单接口结果 (参考https://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=9_1) * @param [type] $payData [description] * @param [type] $trade_type [description] * @param [type] $openid [description] * @return [type] [description] */ public function getResult($payData, $trade_type, $openid = null) { $unifiedOrder = new UnifiedOrder_handle(); if ($opneid != null) { $unifiedOrder->setParam(&#39;openid&#39;, $openid); } $unifiedOrder->setParam(&#39;body&#39;, $payData[&#39;body&#39;]); //商品描述 $unifiedOrder->setParam(&#39;out_trade_no&#39;, $payData[&#39;out_trade_no&#39;]); //商户订单号 $unifiedOrder->setParam(&#39;total_fee&#39;, $payData[&#39;total_fee&#39;]); //总金额 $unifiedOrder->setParam(&#39;attach&#39;, $payData[&#39;attach&#39;]); //附加数据 $unifiedOrder->setParam(&#39;notify_url&#39;, base_url(&#39;/Wxpay/pay_callback&#39;));//通知地址 $unifiedOrder->setParam(&#39;trade_type&#39;, $trade_type); //交易类型 //非必填参数,商户可根据实际情况选填 //$unifiedOrder->setParam("sub_mch_id","XXXX");//子商户号 //$unifiedOrder->setParam("device_info","XXXX");//设备号 //$unifiedOrder->setParam("time_start","XXXX");//交易起始时间 //$unifiedOrder->setParam("time_expire","XXXX");//交易结束时间 //$unifiedOrder->setParam("goods_tag","XXXX");//商品标记 //$unifiedOrder->setParam("product_id","XXXX");//商品ID return $unifiedOrder->getResult(); } /** * 返回微信订单状态 */ public function returnMessage($unifiedOrderResult,$field){ $arrMessage=array("resultCode"=>0,"resultType"=>"获取错误","resultMsg"=>"该字段为空"); if($unifiedOrderResult==null){ $arrMessage["resultType"]="未获取权限"; $arrMessage["resultMsg"]="请重新打开页面"; }elseif ($unifiedOrderResult["return_code"] == "FAIL") { $arrMessage["resultType"]="网络错误"; $arrMessage["resultMsg"]=$unifiedOrderResult[&#39;return_msg&#39;]; } elseif($unifiedOrderResult["result_code"] == "FAIL") { $arrMessage["resultType"]="订单错误"; $arrMessage["resultMsg"]=$unifiedOrderResult[&#39;err_code_des&#39;]; } elseif($unifiedOrderResult[$field] != NULL) { $arrMessage["resultCode"]=1; $arrMessage["resultType"]="生成订单"; $arrMessage["resultMsg"]="OK"; $arrMessage["resultField"] = $unifiedOrderResult[$field]; } return $arrMessage; } /** * 微信回调接口返回 验证签名并回应微信 * @param [type] $xml [description] * @return [type] [description] */ public function wxPayNotify($xml) { $notify = new Wxpay_server(); $notify->saveData($xml); //验证签名,并回复微信 //对后台通知交互时,如果微信收到商户的应答不是成功或者超时,微信认为通知失败 //微信会通过一定的策略(如30分钟共8次),定期重新发起通知 if ($notify->checkSign() == false) { $notify->setReturnParameter("return_code","FAIL");//返回状态码 $notify->setReturnParameter("return_msg","签名失败");//返回信息 } else { $notify->checkSign=TRUE; $notify->setReturnParameter("return_code","SUCCESS");//设置返回码 } return $notify; } } /** * JSAPI支付——H5网页端调起支付接口 */ class JsApi_handle extends JsApi_common { public $code;//code码,用以获取openid public $openid;//用户的openid public $parameters;//jsapi参数,格式为json public $prepay_id;//使用统一支付接口得到的预支付id public $curl_timeout;//curl超时时间 function __construct() { //设置curl超时时间 $this->curl_timeout = WxPayConf::CURL_TIMEOUT; } /** * 生成获取code的URL * @return [type] [description] */ public function createOauthUrlForCode() { //重定向URL $redirectUrl = "http://www.itcen.cn/wxpay/confirm/".$orderId."?showwxpaytitle=1"; $urlParams[&#39;appid&#39;] = WxPayConf::APPID; $urlParams[&#39;redirect_uri&#39;] = $redirectUrl; $urlParams[&#39;response_type&#39;] = &#39;code&#39;; $urlParams[&#39;scope&#39;] = &#39;snsapi_base&#39;; $urlParams[&#39;state&#39;] = "STATE"."#wechat_redirect"; //拼接字符串 $queryString = $this->ToUrlParams($urlParams, false); return "https://open.weixin.qq.com/connect/oauth2/authorize?".$queryString; } /** * 设置code * @param [type] $code [description] */ public function setCode($code) { $this->code = $code; } /** * 作用:设置prepay_id */ public function setPrepayId($prepayId) { $this->prepay_id = $prepayId; } /** * 作用:获取jsapi的参数 */ public function getParams() { $jsApiObj["appId"] = WxPayConf::APPID; $timeStamp = time(); $jsApiObj["timeStamp"] = "$timeStamp"; $jsApiObj["nonceStr"] = $this->createNoncestr(); $jsApiObj["package"] = "prepay_id=$this->prepay_id"; $jsApiObj["signType"] = "MD5"; $jsApiObj["paySign"] = $this->getSign($jsApiObj); $this->parameters = json_encode($jsApiObj); return $this->parameters; } /** * 通过curl 向微信提交code 用以获取openid * @return [type] [description] */ public function getOpenId() { //创建openid 的链接 $url = $this->createOauthUrlForOpenid(); //初始化 $ch = curl_init(); curl_setopt($ch, CURL_TIMEOUT, $this->curl_timeout); curl_setopt($ch, CURL_URL, $url); curl_setopt($ch, CURL_SSL_VERIFYPEER, FALSE); curl_setopt($ch, CURL_SSL_VERIFYHOST, FALSE); curl_setopt($ch, CURL_HEADER, FALSE); curl_setopt($ch, CURL_RETURNTRANSFER, TRUE); //执行curl $res = curl_exec($ch); curl_close($ch); //取出openid $data = json_decode($res); if (isset($data[&#39;openid&#39;])) { $this->openid = $data[&#39;openid&#39;]; } else { return null; } return $this->openid; } /** * 生成可以获取openid 的URL * @return [type] [description] */ public function createOauthUrlForOpenid() { $urlParams[&#39;appid&#39;] = WxPayConf::APPID; $urlParams[&#39;secret&#39;] = WxPayConf::APPSECRET; $urlParams[&#39;code&#39;] = $this->code; $urlParams[&#39;grant_type&#39;] = "authorization_code"; $queryString = $this->ToUrlParams($urlParams, false); return "https://api.weixin.qq.com/sns/oauth2/access_token?".$queryString; } } /** * 统一下单接口类 */ class UnifiedOrder_handle extends Wxpay_client_handle { public function __construct() { //设置接口链接 $this->url = "https://api.mch.weixin.qq.com/pay/unifiedorder"; //设置curl超时时间 $this->curl_timeout = WxPayConf::CURL_TIMEOUT; } } /** * 响应型接口基类 */ class Wxpay_server_handle extends JsApi_common{ public $data; //接收到的数据,类型为关联数组 public $returnParams; //返回参数,类型为关联数组 /** * 将微信请求的xml转换成关联数组 * @param [type] $xml [description] * @return [type] [description] */ public function saveData($xml) { $this->data = $this->xmlToArray($xml); } /** * 验证签名 * @return [type] [description] */ public function checkSign() { $tmpData = $this->data; unset($temData[&#39;sign&#39;]); $sign = $this->getSign($tmpData); if ($this->data[&#39;sign&#39;] == $sign) { return true; } return false; } /** * 设置返回微信的xml数据 */ function setReturnParameter($parameter, $parameterValue) { $this->returnParameters[$this->trimString($parameter)] = $this->trimString($parameterValue); } /** * 将xml数据返回微信 */ function returnXml() { $returnXml = $this->createXml(); return $returnXml; } } /** * 请求型接口的基类 */ class Wxpay_client_handle extends JsApi_common{ public $params; //请求参数,类型为关联数组 public $response; //微信返回的响应 public $result; //返回参数,类型类关联数组 public $url; //接口链接 public $curl_timeout; //curl超时时间 /** * 设置请求参数 * @param [type] $param [description] * @param [type] $paramValue [description] */ public function setParam($param, $paramValue) { $this->params[$this->tirmString($param)] = $this->trimString($paramValue); } /** * 获取结果,默认不使用证书 * @return [type] [description] */ public function getResult() { $this->postxml(); $this->result = $this->xmlToArray($this->response); return $this->result; } /** * post请求xml * @return [type] [description] */ public function postxml() { $xml = $this->createXml(); $this->respOnse= $this->postXmlCurl($xml, $this->curl, $this->curl_timeout); return $this->response; } public function createXml() { $this->params[&#39;appid&#39;] = WxPayConf::APPID; //公众号ID $this->params[&#39;mch_id&#39;] = WxPayConf::MCHID; //商户号 $this->params[&#39;nonce_str&#39;] = $this->createNoncestr(); //随机字符串 $this->params[&#39;sign&#39;] = $this->getSign($this->params); //签名 return $this->arrayToXml($this->params); } } /** * 所有接口的基类 */ class JsApi_common { function __construct() { } public function trimString($value) { $ret = null; if (null != $value) { $ret = trim($value); if (strlen($ret) == 0) { $ret = null; } } return $ret; } /** * 产生随机字符串,不长于32位 * @param integer $length [description] * @return [type] [description] */ public function createNoncestr($length = 32) { $chars = "abcdefghijklmnopqrstuvwxyz0123456789"; $str = &#39;&#39;; for ($i = 0; $i <$length; $i++) { $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1); } return $str; } /** * 格式化参数 拼接字符串,签名过程需要使用 * @param [type] $urlParams [description] * @param [type] $needUrlencode [description] */ public function ToUrlParams($urlParams, $needUrlencode) { $buff = ""; ksort($urlParams); foreach ($urlParams as $k => $v) { if($needUrlencode) $v = urlencode($v); $buff .= $k .&#39;=&#39;. $v .&#39;&&#39;; } $reqString = &#39;&#39;; if (strlen($buff) > 0) { $reqString = substr($buff, 0, strlen($buff) - 1); } return $reqString; } /** * 生成签名 * @param [type] $params [description] * @return [type] [description] */ public function getSign($obj) { foreach ($obj as $k => $v) { $params[$k] = $v; } //签名步骤一:按字典序排序参数 ksort($params); $str = $this->ToUrlParams($params, false); //签名步骤二:在$str后加入key $str = $str."$key=".WxPayConf::KEY; //签名步骤三:md5加密 $str = md5($str); //签名步骤四:所有字符转为大写 $result = strtoupper($str); return $result; } /** * array转xml * @param [type] $arr [description] * @return [type] [description] */ public function arrayToXml($arr) { $xml = ""; foreach ($arr as $k => $v) { if (is_numeric($val)) { $xml .= "<".$key.">".$key."".$key.">"; } else { $xml .= "<".$key.">".$key.">"; } } $xml .= " "; return $xml; } /** * 将xml转为array * @param [type] $xml [description] * @return [type] [description] */ public function xmlToArray($xml) { $arr = json_decode(json_encode(simplexml_load_string($xml, &#39;SinpleXMLElement&#39;, LIBXML_NOCDATA)), true); return $arr; } /** * 以post方式提交xml到对应的接口 * @param [type] $xml [description] * @param [type] $url [description] * @param integer $second [description] * @return [type] [description] */ public function postXmlCurl($xml, $url, $secOnd= 30) { //初始化curl $ch = curl_init(); //设置超时 curl_setopt($ch, CURL_TIMEOUT, $second); curl_setopt($ch, CURL_URL, $url); //这里设置代理,如果有的话 //curl_setopt($ch,CURLOPT_PROXY, &#39;8.8.8.8&#39;); //curl_setopt($ch,CURLOPT_PROXYPORT, 8080); curl_setopt($ch, CURL_SSL_VERIFYHOST, FALSE); curl_setopt($ch, CURL_SSL_VERIFYPEER, FALSE); //设置header curl_setopt($ch, CURL_HEADER, FALSE); //要求结果为字符串且输出到屏幕上 curl_setopt($ch, CURL_RETURNTRANSFER, TRUE); //以post方式提交 curl_setopt($ch, CURL_POST, TRUE); curl_setopt($ch, CURL_POSTFIELDS, $xml); //执行curl $res = curl_exec($ch); if ($res) { curl_close($ch); return $res; } else { $error = curl_errno($ch); echo "curl出错,错误码:$error"."
"; echo "错误原因查询"; curl_close($ch); return false; } } } /** * 配置类 */ class WxPayConf { //微信公众号身份的唯一标识。 const APPID = &#39;wx654a22c6423213b7&#39;; //受理商ID,身份标识 const MCHID = &#39;10043241&#39;; const MCHNAME = &#39;KellyCen的博客&#39;; //商户支付密钥Key。 const KEY = &#39;0000000000000000000000000000000&#39;; //JSAPI接口中获取openid const APPSECRET = &#39;000000000000000000000000000&#39;; //证书路径,注意应该填写绝对路径 const SSLCERT_PATH = &#39;/home/WxPayCacert/apiclient_cert.pem&#39;; const SSLKEY_PATH = &#39;/home/WxPayCacert/apiclient_key.pem&#39;; const SSLCA_PATH = &#39;/home/WxPayCacert/rootca.pem&#39;; //本例程通过curl使用HTTP POST方法,此处可修改其超时时间,默认为30秒 const CURL_TIMEOUT = 30; } Wxpay_model.php
Wxpay_model.php
获取到code的URL后,将其分配到页面去,让用户去点击,用户进行点击后,就会从微信服务器获取到code,然后回调到redirect_uri所指的地址去。
2、获取到code后,会回调到redirect_uri所指向的地址去,这里是到了/Wxpay/confirm/,看看这个confirm方法是打算干嘛的:
/** * 手机端微信支付,此处是授权获取到code时的回调地址 * @param [type] $orderId 订单编号id * @return [type] [description] */ public function confirm($orderId) { //先确认用户是否登录 $this->ensureLogin(); //通过订单编号获取订单数据 $order = $this->wxpay_model->get($orderId); //验证订单是否是当前用户 $this->_verifyUser($order); //取得支付所需要的订单数据 $orderData = $this->returnOrderData[$orderId]; //取得jsApi所需要的数据 $wxJsApiData = $this->wxpay_model->wxPayJsApi($orderData); //将数据分配到模板去,在js里使用 $this->smartyData[&#39;wxJsApiData&#39;] = json_encode($wxJsApiData, JSON_UNESCAPED_UNICODE); $this->smartyData[&#39;order&#39;] = $orderData; $this->displayView(&#39;wxpay/confirm.tpl&#39;); }
这一步开始去取JSAPI支付接口所需要的数据了,这一步算是最主要的一步,这里还会调用统一下单接口获取到prepay_id,我们跳到
$this->wxpay_model->wxPayJsApi($orderData) 看看:
/** * 微信jsapi点击支付 * @param [type] $data [description] * @return [type] [description] */ public function wxPayJsApi($data) { $jsApi = new JsApi_handle(); //统一下单接口所需数据 $payData = $this->returnData($data); //获取code码,用以获取openid $code = $_GET[&#39;code&#39;]; $jsApi->setCode($code); //通过code获取openid $openid = $jsApi->getOpenId(); $unifiedOrderResult = null; if ($openid != null) { //取得统一下单接口返回的数据 $unifiedOrderResult = $this->getResult($payData, &#39;JSAPI&#39;, $openid); //获取订单接口状态 $returnMessage = $this->returnMessage($unifiedOrder, &#39;prepay_id&#39;); if ($returnMessage[&#39;resultCode&#39;]) { $jsApi->setPrepayId($retuenMessage[&#39;resultField&#39;]); //取得wxjsapi接口所需要的数据 $returnMessage[&#39;resultData&#39;] = $jsApi->getParams(); } return $returnMessage; } }
这里首先是取得下单接口所需要的数据;
接着获取到code码,通过code码获取到openid;
然后调用统一下单接口,取得下单接口的响应数据,即prepay_id;
最后取得微信支付JSAPI所需要的数据。
这就是上面这个方法所要做的事情,取到数据后,会将数据分配到模板里,然后根据官方文档所给的参考格式将其放在js里,如下面的代码:
点击支付
3、此时用户只需要点击支付,就可以开始进入支付界面了,接着就是输入密码,确认,最后会提示支付成功,紧接着网站会提供一个支付成功跳转页面。类似微信文档里所提供的图片这样,这里我就直接截取文档里的案例图了:
支付成功后,微信支付系统会将支付结果异步发送到此地址上/Wxpay/pay_callback/ ,我们来看一下这个方法
/** * 支付回调接口 * @return [type] [description] */ public function pay_callback() { $postData = &#39;&#39;; if (file_get_contents("php://input")) { $postData = file_get_contents("php://input"); } else { return; } $payInfo = array(); $notify = $this->wxpay_model->wxPayNotify($postData); if ($notify->checkSign == TRUE) { if ($notify->data[&#39;return_code&#39;] == &#39;FAIL&#39;) { $payInfo[&#39;status&#39;] = FALSE; $payInfo[&#39;msg&#39;] = &#39;通信出错&#39;; } elseif ($notify->data[&#39;result_code&#39;] == &#39;FAIL&#39;) { $payInfo[&#39;status&#39;] = FALSE; $payInfo[&#39;msg&#39;] = &#39;业务出错&#39;; } else { $payInfo[&#39;status&#39;] = TRUE; $payInfo[&#39;msg&#39;] = &#39;支付成功&#39;; $payInfo[&#39;sn&#39;]=substr($notify->data[&#39;out_trade_no&#39;],8); $payInfo[&#39;order_no&#39;] = $notify->data[&#39;out_trade_no&#39;]; $payInfo[&#39;platform_no&#39;]=$notify->data[&#39;transaction_id&#39;]; $payInfo[&#39;attach&#39;]=$notify->data[&#39;attach&#39;]; $payInfo[&#39;fee&#39;]=$notify->data[&#39;cash_fee&#39;]; $payInfo[&#39;currency&#39;]=$notify->data[&#39;fee_type&#39;]; $payInfo[&#39;user_sign&#39;]=$notify->data[&#39;openid&#39;]; } } $returnXml = $notify->returnXml(); echo $returnXml; $this->load->library(&#39;RedisCache&#39;); if($payInfo[&#39;status&#39;]){ //这里要记录到日志处理(略) $this->model->order->onPaySuccess($payInfo[&#39;sn&#39;], $payInfo[&#39;order_no&#39;], $payInfo[&#39;platform_no&#39;],&#39;&#39;, $payInfo[&#39;user_sign&#39;], $payInfo); $this->redis->RedisCache->set(&#39;order:payNo:&#39;.$payInfo[&#39;order_no&#39;],&#39;OK&#39;,5000); }else{ //这里要记录到日志处理(略) $this->model->order->onPayFailure($payInfo[&#39;sn&#39;], $payInfo[&#39;order_no&#39;], $payInfo[&#39;platform_no&#39;],&#39;&#39;, $payInfo[&#39;user_sign&#39;], $payInfo, &#39;订单支付失败 [&#39;.$payInfo[&#39;msg&#39;].&#39;]&#39;); } }
这方法就是对支付是否成功,对网站的支付相关逻辑进行后续处理,例如假如支付失败,就需要记录日志里说明此次交易失败,或者是做某一些逻辑处理,而支付成功又该如何做处理,等等。
这里我们就分析下这个方法 $this->wxpay_model->wxPayNotify($postData); 对异步返回的数据进行安全性校验,例如验证签名,看看model里的这个方法:
/** * 微信回调接口返回 验证签名并回应微信 * @param [type] $xml [description] * @return [type] [description] */ public function wxPayNotify($xml) { $notify = new Wxpay_server(); $notify->saveData($xml); //验证签名,并回复微信 //对后台通知交互时,如果微信收到商户的应答不是成功或者超时,微信认为通知失败 //微信会通过一定的策略(如30分钟共8次),定期重新发起通知 if ($notify->checkSign() == false) { $notify->setReturnParameter("return_code","FAIL");//返回状态码 $notify->setReturnParameter("return_msg","签名失败");//返回信息 } else { $notify->checkSign=TRUE; $notify->setReturnParameter("return_code","SUCCESS");//设置返回码 } return $notify; }
如果验证通过,则就开始进行交易成功或者失败时所要做的逻辑处理了,这逻辑处理的代码我就不写了,因为每一个网站的处理方式都不一样,我这里是这样处理的,我把思路写下,方便不懂的朋友可以按着我的思路去完善后续的处理:首先是查看数据库里的订单日志表,看这笔交易之前是否已经交易过了,交易过就不用再更新数据表了,如果没交易过,就会将之前存在redis的订单数据给取出来,再将这些数据插入到订单日志表里,差不多就这样处理。
好了,基于H5的微信支付接口开发详解就讲到这里,如果你认真理清博文里所讲解的思路,自己基本上也可以尝试开发此接口了,同时只要会了这个,你也基本上可以开发二维码支付,刷卡支付等等的支付接口。
这里我附上此次开发中的完整代码供大家阅读:
load->model(&#39;wxpay_model&#39;); //$this->load->model(&#39;wxpay&#39;); } public function index() { //微信支付 $this->smarty[&#39;wxPayUrl&#39;] = $this->wxpay_model->retWxPayUrl(); $this->displayView(&#39;wxpay/index.tpl&#39;); } /** * 手机端微信支付,此处是授权获取到code时的回调地址 * @param [type] $orderId 订单编号id * @return [type] [description] */ public function confirm($orderId) { //先确认用户是否登录 $this->ensureLogin(); //通过订单编号获取订单数据 $order = $this->wxpay_model->get($orderId); //验证订单是否是当前用户 $this->_verifyUser($order); //取得支付所需要的订单数据 $orderData = $this->returnOrderData[$orderId]; //取得jsApi所需要的数据 $wxJsApiData = $this->wxpay_model->wxPayJsApi($orderData); //将数据分配到模板去,在js里使用 $this->smartyData[&#39;wxJsApiData&#39;] = json_encode($wxJsApiData, JSON_UNESCAPED_UNICODE); $this->smartyData[&#39;order&#39;] = $orderData; $this->displayView(&#39;wxpay/confirm.tpl&#39;); } /** * 支付回调接口 * @return [type] [description] */ public function pay_callback() { $postData = &#39;&#39;; if (file_get_contents("php://input")) { $postData = file_get_contents("php://input"); } else { return; } $payInfo = array(); $notify = $this->wxpay_model->wxPayNotify($postData); if ($notify->checkSign == TRUE) { if ($notify->data[&#39;return_code&#39;] == &#39;FAIL&#39;) { $payInfo[&#39;status&#39;] = FALSE; $payInfo[&#39;msg&#39;] = &#39;通信出错&#39;; } elseif ($notify->data[&#39;result_code&#39;] == &#39;FAIL&#39;) { $payInfo[&#39;status&#39;] = FALSE; $payInfo[&#39;msg&#39;] = &#39;业务出错&#39;; } else { $payInfo[&#39;status&#39;] = TRUE; $payInfo[&#39;msg&#39;] = &#39;支付成功&#39;; $payInfo[&#39;sn&#39;]=substr($notify->data[&#39;out_trade_no&#39;],8); $payInfo[&#39;order_no&#39;] = $notify->data[&#39;out_trade_no&#39;]; $payInfo[&#39;platform_no&#39;]=$notify->data[&#39;transaction_id&#39;]; $payInfo[&#39;attach&#39;]=$notify->data[&#39;attach&#39;]; $payInfo[&#39;fee&#39;]=$notify->data[&#39;cash_fee&#39;]; $payInfo[&#39;currency&#39;]=$notify->data[&#39;fee_type&#39;]; $payInfo[&#39;user_sign&#39;]=$notify->data[&#39;openid&#39;]; } } $returnXml = $notify->returnXml(); echo $returnXml; $this->load->library(&#39;RedisCache&#39;); if($payInfo[&#39;status&#39;]){ //这里要记录到日志处理(略) $this->model->order->onPaySuccess($payInfo[&#39;sn&#39;], $payInfo[&#39;order_no&#39;], $payInfo[&#39;platform_no&#39;],&#39;&#39;, $payInfo[&#39;user_sign&#39;], $payInfo); $this->redis->RedisCache->set(&#39;order:payNo:&#39;.$payInfo[&#39;order_no&#39;],&#39;OK&#39;,5000); }else{ //这里要记录到日志处理(略) $this->model->order->onPayFailure($payInfo[&#39;sn&#39;], $payInfo[&#39;order_no&#39;], $payInfo[&#39;platform_no&#39;],&#39;&#39;, $payInfo[&#39;user_sign&#39;], $payInfo, &#39;订单支付失败 [&#39;.$payInfo[&#39;msg&#39;].&#39;]&#39;); } } /** * 返回支付所需要的数据 * @param [type] $orderId 订单号 * @param string $data 订单数据,当$data数据存在时刷新$orderData缓存,因为订单号不唯一 * @return [type] [description] */ public function returnOrderData($orderId, $data = &#39;&#39;) { //获取订单数据 $order = $this->wxpay_model->get($orderId); if (0 === count($order)) return false; if (empty($data)) { $this->load->library(&#39;RedisCache&#39;); //取得缓存在redis的订单数据 $orderData = $this->rediscache->getJson("order:orderData:".$orderId); if (empty($orderData)) { //如果redis里没有,则直接读数据库取 $this->load->model(&#39;order_model&#39;); $order = $this->order_model->get($orderId); if (0 === count($order)) { return false; } $data = $order; } else { //如果redis里面有的话,直接返回数据 return $orderData; } } //支付前缓存所需要的数据 $orderData[&#39;id&#39;] = $data[&#39;id&#39;]; $orderData[&#39;fee&#39;] = $data[&#39;fee&#39;]; //支付平台需要的数据 $orderData[&#39;user_id&#39;] = $data[&#39;user_id&#39;]; $orderData[&#39;sn&#39;] = $data[&#39;cn&#39;]; //这是唯一编号 $orderData[&#39;order_no&#39;] = substr(md5($data[&#39;sn&#39;].$data[&#39;fee&#39;]), 8, 8).$data[&#39;sn&#39;]; $orderData[&#39;fee&#39;] = $data[&#39;fee&#39;]; $orderData[&#39;time&#39;] = $data[&#39;time&#39;]; $orderData[&#39;goods_name&#39;] = $data[&#39;goods_name&#39;]; $orderData[&#39;attach&#39;] = $data[&#39;attach&#39;]; //将数据缓存到redis里面 $this->rediscache->set("order:orderData:".$orderId, $orderData, 3600*24); //做个标识缓存到redis,用以判断该订单是否已经支付了 $this->rediscache->set("order:payNo:".$orderData[&#39;order_no&#39;], "NO", 3600*24); return $orderData; } private function _verifyUser($order) { if (empty($order)) show_404(); if (0 === count($order)) show_404(); //判断订单表里的用户id是否是当前登录者的id if ($order[&#39;user_id&#39;] == $this->uid) return; show_error(&#39;只能查看自己的订单&#39;); } } 控制器:Wxpay.php
控制器:Wxpay.php
createOauthUrlForCode(); } /** * 微信jsapi点击支付 * @param [type] $data [description] * @return [type] [description] */ public function wxPayJsApi($data) { $jsApi = new JsApi_handle(); //统一下单接口所需数据 $payData = $this->returnData($data); //获取code码,用以获取openid $code = $_GET[&#39;code&#39;]; $jsApi->setCode($code); //通过code获取openid $openid = $jsApi->getOpenId(); $unifiedOrderResult = null; if ($openid != null) { //取得统一下单接口返回的数据 $unifiedOrderResult = $this->getResult($payData, &#39;JSAPI&#39;, $openid); //获取订单接口状态 $returnMessage = $this->returnMessage($unifiedOrder, &#39;prepay_id&#39;); if ($returnMessage[&#39;resultCode&#39;]) { $jsApi->setPrepayId($retuenMessage[&#39;resultField&#39;]); //取得wxjsapi接口所需要的数据 $returnMessage[&#39;resultData&#39;] = $jsApi->getParams(); } return $returnMessage; } } /** * 统一下单接口所需要的数据 * @param [type] $data [description] * @return [type] [description] */ public function returnData($data) { $payData[&#39;sn&#39;] = $data[&#39;sn&#39;]; $payData[&#39;body&#39;] = $data[&#39;goods_name&#39;]; $payData[&#39;out_trade_no&#39;] = $data[&#39;order_no&#39;]; $payData[&#39;total_fee&#39;] = $data[&#39;fee&#39;]; $payData[&#39;attach&#39;] = $data[&#39;attach&#39;]; return $payData; } /** * 返回统一下单接口结果 (参考https://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=9_1) * @param [type] $payData [description] * @param [type] $trade_type [description] * @param [type] $openid [description] * @return [type] [description] */ public function getResult($payData, $trade_type, $openid = null) { $unifiedOrder = new UnifiedOrder_handle(); if ($opneid != null) { $unifiedOrder->setParam(&#39;openid&#39;, $openid); } $unifiedOrder->setParam(&#39;body&#39;, $payData[&#39;body&#39;]); //商品描述 $unifiedOrder->setParam(&#39;out_trade_no&#39;, $payData[&#39;out_trade_no&#39;]); //商户订单号 $unifiedOrder->setParam(&#39;total_fee&#39;, $payData[&#39;total_fee&#39;]); //总金额 $unifiedOrder->setParam(&#39;attach&#39;, $payData[&#39;attach&#39;]); //附加数据 $unifiedOrder->setParam(&#39;notify_url&#39;, base_url(&#39;/Wxpay/pay_callback&#39;));//通知地址 $unifiedOrder->setParam(&#39;trade_type&#39;, $trade_type); //交易类型 //非必填参数,商户可根据实际情况选填 //$unifiedOrder->setParam("sub_mch_id","XXXX");//子商户号 //$unifiedOrder->setParam("device_info","XXXX");//设备号 //$unifiedOrder->setParam("time_start","XXXX");//交易起始时间 //$unifiedOrder->setParam("time_expire","XXXX");//交易结束时间 //$unifiedOrder->setParam("goods_tag","XXXX");//商品标记 //$unifiedOrder->setParam("product_id","XXXX");//商品ID return $unifiedOrder->getResult(); } /** * 返回微信订单状态 */ public function returnMessage($unifiedOrderResult,$field){ $arrMessage=array("resultCode"=>0,"resultType"=>"获取错误","resultMsg"=>"该字段为空"); if($unifiedOrderResult==null){ $arrMessage["resultType"]="未获取权限"; $arrMessage["resultMsg"]="请重新打开页面"; }elseif ($unifiedOrderResult["return_code"] == "FAIL") { $arrMessage["resultType"]="网络错误"; $arrMessage["resultMsg"]=$unifiedOrderResult[&#39;return_msg&#39;]; } elseif($unifiedOrderResult["result_code"] == "FAIL") { $arrMessage["resultType"]="订单错误"; $arrMessage["resultMsg"]=$unifiedOrderResult[&#39;err_code_des&#39;]; } elseif($unifiedOrderResult[$field] != NULL) { $arrMessage["resultCode"]=1; $arrMessage["resultType"]="生成订单"; $arrMessage["resultMsg"]="OK"; $arrMessage["resultField"] = $unifiedOrderResult[$field]; } return $arrMessage; } /** * 微信回调接口返回 验证签名并回应微信 * @param [type] $xml [description] * @return [type] [description] */ public function wxPayNotify($xml) { $notify = new Wxpay_server(); $notify->saveData($xml); //验证签名,并回复微信 //对后台通知交互时,如果微信收到商户的应答不是成功或者超时,微信认为通知失败 //微信会通过一定的策略(如30分钟共8次),定期重新发起通知 if ($notify->checkSign() == false) { $notify->setReturnParameter("return_code","FAIL");//返回状态码 $notify->setReturnParameter("return_msg","签名失败");//返回信息 } else { $notify->checkSign=TRUE; $notify->setReturnParameter("return_code","SUCCESS");//设置返回码 } return $notify; } } /** * JSAPI支付——H5网页端调起支付接口 */ class JsApi_handle extends JsApi_common { public $code;//code码,用以获取openid public $openid;//用户的openid public $parameters;//jsapi参数,格式为json public $prepay_id;//使用统一支付接口得到的预支付id public $curl_timeout;//curl超时时间 function __construct() { //设置curl超时时间 $this->curl_timeout = WxPayConf::CURL_TIMEOUT; } /** * 生成获取code的URL * @return [type] [description] */ public function createOauthUrlForCode() { //重定向URL $redirectUrl = "http://www.itcen.cn/wxpay/confirm/".$orderId."?showwxpaytitle=1"; $urlParams[&#39;appid&#39;] = WxPayConf::APPID; $urlParams[&#39;redirect_uri&#39;] = $redirectUrl; $urlParams[&#39;response_type&#39;] = &#39;code&#39;; $urlParams[&#39;scope&#39;] = &#39;snsapi_base&#39;; $urlParams[&#39;state&#39;] = "STATE"."#wechat_redirect"; //拼接字符串 $queryString = $this->ToUrlParams($urlParams, false); return "https://open.weixin.qq.com/connect/oauth2/authorize?".$queryString; } /** * 设置code * @param [type] $code [description] */ public function setCode($code) { $this->code = $code; } /** * 作用:设置prepay_id */ public function setPrepayId($prepayId) { $this->prepay_id = $prepayId; } /** * 作用:获取jsapi的参数 */ public function getParams() { $jsApiObj["appId"] = WxPayConf::APPID; $timeStamp = time(); $jsApiObj["timeStamp"] = "$timeStamp"; $jsApiObj["nonceStr"] = $this->createNoncestr(); $jsApiObj["package"] = "prepay_id=$this->prepay_id"; $jsApiObj["signType"] = "MD5"; $jsApiObj["paySign"] = $this->getSign($jsApiObj); $this->parameters = json_encode($jsApiObj); return $this->parameters; } /** * 通过curl 向微信提交code 用以获取openid * @return [type] [description] */ public function getOpenId() { //创建openid 的链接 $url = $this->createOauthUrlForOpenid(); //初始化 $ch = curl_init(); curl_setopt($ch, CURL_TIMEOUT, $this->curl_timeout); curl_setopt($ch, CURL_URL, $url); curl_setopt($ch, CURL_SSL_VERIFYPEER, FALSE); curl_setopt($ch, CURL_SSL_VERIFYHOST, FALSE); curl_setopt($ch, CURL_HEADER, FALSE); curl_setopt($ch, CURL_RETURNTRANSFER, TRUE); //执行curl $res = curl_exec($ch); curl_close($ch); //取出openid $data = json_decode($res); if (isset($data[&#39;openid&#39;])) { $this->openid = $data[&#39;openid&#39;]; } else { return null; } return $this->openid; } /** * 生成可以获取openid 的URL * @return [type] [description] */ public function createOauthUrlForOpenid() { $urlParams[&#39;appid&#39;] = WxPayConf::APPID; $urlParams[&#39;secret&#39;] = WxPayConf::APPSECRET; $urlParams[&#39;code&#39;] = $this->code; $urlParams[&#39;grant_type&#39;] = "authorization_code"; $queryString = $this->ToUrlParams($urlParams, false); return "https://api.weixin.qq.com/sns/oauth2/access_token?".$queryString; } } /** * 统一下单接口类 */ class UnifiedOrder_handle extends Wxpay_client_handle { public function __construct() { //设置接口链接 $this->url = "https://api.mch.weixin.qq.com/pay/unifiedorder"; //设置curl超时时间 $this->curl_timeout = WxPayConf::CURL_TIMEOUT; } } /** * 响应型接口基类 */ class Wxpay_server_handle extends JsApi_common{ public $data; //接收到的数据,类型为关联数组 public $returnParams; //返回参数,类型为关联数组 /** * 将微信请求的xml转换成关联数组 * @param [type] $xml [description] * @return [type] [description] */ public function saveData($xml) { $this->data = $this->xmlToArray($xml); } /** * 验证签名 * @return [type] [description] */ public function checkSign() { $tmpData = $this->data; unset($temData[&#39;sign&#39;]); $sign = $this->getSign($tmpData); if ($this->data[&#39;sign&#39;] == $sign) { return true; } return false; } /** * 设置返回微信的xml数据 */ function setReturnParameter($parameter, $parameterValue) { $this->returnParameters[$this->trimString($parameter)] = $this->trimString($parameterValue); } /** * 将xml数据返回微信 */ function returnXml() { $returnXml = $this->createXml(); return $returnXml; } } /** * 请求型接口的基类 */ class Wxpay_client_handle extends JsApi_common{ public $params; //请求参数,类型为关联数组 public $response; //微信返回的响应 public $result; //返回参数,类型类关联数组 public $url; //接口链接 public $curl_timeout; //curl超时时间 /** * 设置请求参数 * @param [type] $param [description] * @param [type] $paramValue [description] */ public function setParam($param, $paramValue) { $this->params[$this->tirmString($param)] = $this->trimString($paramValue); } /** * 获取结果,默认不使用证书 * @return [type] [description] */ public function getResult() { $this->postxml(); $this->result = $this->xmlToArray($this->response); return $this->result; } /** * post请求xml * @return [type] [description] */ public function postxml() { $xml = $this->createXml(); $this->respOnse= $this->postXmlCurl($xml, $this->curl, $this->curl_timeout); return $this->response; } public function createXml() { $this->params[&#39;appid&#39;] = WxPayConf::APPID; //公众号ID $this->params[&#39;mch_id&#39;] = WxPayConf::MCHID; //商户号 $this->params[&#39;nonce_str&#39;] = $this->createNoncestr(); //随机字符串 $this->params[&#39;sign&#39;] = $this->getSign($this->params); //签名 return $this->arrayToXml($this->params); } } /** * 所有接口的基类 */ class JsApi_common { function __construct() { } public function trimString($value) { $ret = null; if (null != $value) { $ret = trim($value); if (strlen($ret) == 0) { $ret = null; } } return $ret; } /** * 产生随机字符串,不长于32位 * @param integer $length [description] * @return [type] [description] */ public function createNoncestr($length = 32) { $chars = "abcdefghijklmnopqrstuvwxyz0123456789"; $str = &#39;&#39;; for ($i = 0; $i <$length; $i++) { $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1); } return $str; } /** * 格式化参数 拼接字符串,签名过程需要使用 * @param [type] $urlParams [description] * @param [type] $needUrlencode [description] */ public function ToUrlParams($urlParams, $needUrlencode) { $buff = ""; ksort($urlParams); foreach ($urlParams as $k => $v) { if($needUrlencode) $v = urlencode($v); $buff .= $k .&#39;=&#39;. $v .&#39;&&#39;; } $reqString = &#39;&#39;; if (strlen($buff) > 0) { $reqString = substr($buff, 0, strlen($buff) - 1); } return $reqString; } /** * 生成签名 * @param [type] $params [description] * @return [type] [description] */ public function getSign($obj) { foreach ($obj as $k => $v) { $params[$k] = $v; } //签名步骤一:按字典序排序参数 ksort($params); $str = $this->ToUrlParams($params, false); //签名步骤二:在$str后加入key $str = $str."$key=".WxPayConf::KEY; //签名步骤三:md5加密 $str = md5($str); //签名步骤四:所有字符转为大写 $result = strtoupper($str); return $result; } /** * array转xml * @param [type] $arr [description] * @return [type] [description] */ public function arrayToXml($arr) { $xml = ""; foreach ($arr as $k => $v) { if (is_numeric($val)) { $xml .= "<".$key.">".$key."".$key.">"; } else { $xml .= "<".$key.">".$key.">"; } } $xml .= " "; return $xml; } /** * 将xml转为array * @param [type] $xml [description] * @return [type] [description] */ public function xmlToArray($xml) { $arr = json_decode(json_encode(simplexml_load_string($xml, &#39;SinpleXMLElement&#39;, LIBXML_NOCDATA)), true); return $arr; } /** * 以post方式提交xml到对应的接口 * @param [type] $xml [description] * @param [type] $url [description] * @param integer $second [description] * @return [type] [description] */ public function postXmlCurl($xml, $url, $secOnd= 30) { //初始化curl $ch = curl_init(); //设置超时 curl_setopt($ch, CURL_TIMEOUT, $second); curl_setopt($ch, CURL_URL, $url); //这里设置代理,如果有的话 //curl_setopt($ch,CURLOPT_PROXY, &#39;8.8.8.8&#39;); //curl_setopt($ch,CURLOPT_PROXYPORT, 8080); curl_setopt($ch, CURL_SSL_VERIFYHOST, FALSE); curl_setopt($ch, CURL_SSL_VERIFYPEER, FALSE); //设置header curl_setopt($ch, CURL_HEADER, FALSE); //要求结果为字符串且输出到屏幕上 curl_setopt($ch, CURL_RETURNTRANSFER, TRUE); //以post方式提交 curl_setopt($ch, CURL_POST, TRUE); curl_setopt($ch, CURL_POSTFIELDS, $xml); //执行curl $res = curl_exec($ch); if ($res) { curl_close($ch); return $res; } else { $error = curl_errno($ch); echo "curl出错,错误码:$error"."
"; echo "错误原因查询"; curl_close($ch); return false; } } } /** * 配置类 */ class WxPayConf { //微信公众号身份的唯一标识。 const APPID = &#39;wx654a22c6423213b7&#39;; //受理商ID,身份标识 const MCHID = &#39;10043241&#39;; const MCHNAME = &#39;KellyCen的博客&#39;; //商户支付密钥Key。 const KEY = &#39;0000000000000000000000000000000&#39;; //JSAPI接口中获取openid const APPSECRET = &#39;000000000000000000000000000&#39;; //证书路径,注意应该填写绝对路径 const SSLCERT_PATH = &#39;/home/WxPayCacert/apiclient_cert.pem&#39;; const SSLKEY_PATH = &#39;/home/WxPayCacert/apiclient_key.pem&#39;; const SSLCA_PATH = &#39;/home/WxPayCacert/rootca.pem&#39;; //本例程通过curl使用HTTP POST方法,此处可修改其超时时间,默认为30秒 const CURL_TIMEOUT = 30; } 模型:Wxpay_model.php
微信支付 视图:index.tpl
里面所用到的一些自定义函数可以在我上一篇博文里找找,那里已经提供了代码参考了。
更多基于H5的微信支付开发详解 相关文章请关注PHP中文网!