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這篇文章將為大家詳細講解有關如何實現基于H5的微信支付開發,小編覺得挺實用的,因此分享給大家做個參考,希望大家閱讀完這篇文章后可以有所收獲。
一、前言
為何我還寫一篇微信支付接口的博文呢?第一,我們必須知道,所謂的工作經驗很多都是靠總結出來的,你只有總結了更多知識,積累了更多經驗,你才能在該行業中脫穎而出,我個人覺得如今的招聘,很多都需要工作經驗(1年、3年、5年....),其實,工作時間的長久不能衡量一個人技術水平的高低,有的人一年的工作經驗能拿3年工作經驗的程序猿的工資,有的3年工作經驗的卻有可能比別人只有一年工作經驗的還低,所以說,總結才能讓自己的知識體系,經驗深度更牛逼更穩固(雖然寫一篇博文挺花費時間的);第二,寫博文分享給大家還是挺有成就感的,首先是能讓新手從我分享的博文中能學到東西,并且能快速將博文所講解的技術運用到實際中來,所以我寫的博文基本上能讓新人快速讀懂并且容易理解,另外,技術大神的話,看到博文有講解的不對之處,還可以指出,并且可以交流,何樂而不為呢,我們需要的就是分享和交流。
扯遠了,直接進入該主題的詳解。
現在的微信支付方式有N種,看下圖,有刷卡支付、公眾號支付、掃碼支付和APP支付,另外還有支付工具的開發,本博文選擇的是公眾號支付借口而開發進行講解,其他幾種支付接口開發基本上思路都是一樣的,只要你能看懂我這博文所講解的基本思路,你基本上也能獨自開發其他幾個支付接口。
二、思路詳解
我們可以拿微信支付接口文檔里的業務流程時序圖看看,如下圖,基本思路是這樣子:首先在后臺生成一個鏈接,展示給用戶讓用戶點擊(例如頁面上有微信支付的按鈕),用戶點擊按鈕后,網站后臺會根據訂單的相關信息生成一個支付訂單,此時會調用統一下單接口,對微信支付系統發起請求,而微信支付系統受到請求后,會根據請求過來的數據,生成一個 預支付交易會話標識(prepay_id,就是通過這個來識別該訂單的),我們的網站收到微信支付系統的響應后,會得到prepay_id,然后通過自己構造微信支付所需要的參數,接著將支付所需參數返回給客戶端,用戶此時可能會有一個訂單信息頁,會有一個按鈕,點擊支付,此時會調用JSAPI接口對微信支付系統發起 請求支付,微信支付系統檢查了請求的相關合法性之后,就會提示輸入密碼,用戶此時輸入密碼確認,微信支付系統會對其進行驗證,通過的話會返回支付結果,然后微信跳轉會H5頁面,這其中有一步是異步通知網站支付結果,我們網站需要對此進行處理(比如說異步支付結果通過后,需要更新數據表或者訂單信息,例如標志用戶已支付該訂單了,同時也需要更新訂單日志,防止用戶重復提交訂單)。
三、代碼講解
本次開發環境用的是php5.6 + MySQL + Redis + Linux + Apache,所選用的框架的CI框架(這些環境不一定需要和我的一致,框架也可以自己選擇,反正自己稍微修改下代碼就能移植過去了)。
微信支付接口的開發代碼我已經提前寫好了,在這里我對其進行分析講解,方便大家能輕松理解,當然,假如你有一定的基礎,直接看代碼就能理清所有流程了,并且我的代碼基本上都寫上了注釋(對于新手來說,這一點比微信文檔所提供的代碼好一點)。
1、構造一個鏈接展示給用戶
這里我們提前需要知道一個點,那就是請求統一下單接口需要微信用戶的openid(詳情可看這https://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=9_1),而獲取openid需要先獲取code(詳情可看這微信登錄接口),所以我們需要構造一個獲取code的URL:
Wxpay.php文件: <?php defined('BASEPATH') OR exit('No direct script access allowed'); class Wxpay extends MY_Controller { public function __construct() { parent::__construct(); $this->load->model('wxpay_model'); //$this->load->model('wxpay'); } public function index() { //微信支付 $this->smarty['wxPayUrl'] = $this->wxpay_model->retWxPayUrl(); $this->displayView('wxpay/index.tpl'); } }
在這先看看model里所寫的幾個類:model里有幾個類:微信支付類、統一下單接口類、響應型接口基類、請求型接口基類、所有接口基類、配置類。為何要分那么多類而不在一個類里實現所有的方法的,因為,這樣看起來代碼邏輯清晰,哪個類該干嘛就干嘛。
這里我直接附上model的代碼了,里面基本上每一個類每一個方法甚至每一行代碼都會有解釋的了,這里我就不對其展開一句句分析了:
<?php defined('BASEPATH') OR exit('No direct script access allowed'); class Wxpay_model extends CI_Model { public function __construct() { parent::__construct(); } /** * 返回可以獲得微信code的URL (用以獲取openid) * @return [type] [description] */ public function retWxPayUrl() { $jsApi = new JsApi_handle(); return $jsApi->createOauthUrlForCode(); } /** * 微信jsapi點擊支付 * @param [type] $data [description] * @return [type] [description] */ public function wxPayJsApi($data) { $jsApi = new JsApi_handle(); //統一下單接口所需數據 $payData = $this->returnData($data); //獲取code碼,用以獲取openid $code = $_GET['code']; $jsApi->setCode($code); //通過code獲取openid $openid = $jsApi->getOpenId(); $unifiedOrderResult = null; if ($openid != null) { //取得統一下單接口返回的數據 $unifiedOrderResult = $this->getResult($payData, 'JSAPI', $openid); //獲取訂單接口狀態 $returnMessage = $this->returnMessage($unifiedOrder, 'prepay_id'); if ($returnMessage['resultCode']) { $jsApi->setPrepayId($retuenMessage['resultField']); //取得wxjsapi接口所需要的數據 $returnMessage['resultData'] = $jsApi->getParams(); } return $returnMessage; } } /** * 統一下單接口所需要的數據 * @param [type] $data [description] * @return [type] [description] */ public function returnData($data) { $payData['sn'] = $data['sn']; $payData['body'] = $data['goods_name']; $payData['out_trade_no'] = $data['order_no']; $payData['total_fee'] = $data['fee']; $payData['attach'] = $data['attach']; return $payData; } /** * 返回統一下單接口結果 (參考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('openid', $openid); } $unifiedOrder->setParam('body', $payData['body']); //商品描述 $unifiedOrder->setParam('out_trade_no', $payData['out_trade_no']); //商戶訂單號 $unifiedOrder->setParam('total_fee', $payData['total_fee']); //總金額 $unifiedOrder->setParam('attach', $payData['attach']); //附加數據 $unifiedOrder->setParam('notify_url', base_url('/Wxpay/pay_callback'));//通知地址 $unifiedOrder->setParam('trade_type', $trade_type); //交易類型 //非必填參數,商戶可根據實際情況選填 //$unifiedOrder->setParam("sub_mch_id","XXXX");//子商戶號 //$unifiedOrder->setParam("device_info","XXXX");//設備號 //$unifiedOrder->setParam("time_start","XXXX");//交易起始時間 //$unifiedOrder->setParam("time_expire","XXXX");//交易結束時間 //$unifiedOrder->setParam("goods_tag","XXXX");//商品標記 //$unifiedOrder->setParam("product_id","XXXX");//商品ID return $unifiedOrder->getResult(); } /** * 返回微信訂單狀態 */ public function returnMessage($unifiedOrderResult,$field){ $arrMessage=array("resultCode"=>0,"resultType"=>"獲取錯誤","resultMsg"=>"該字段為空"); if($unifiedOrderResult==null){ $arrMessage["resultType"]="未獲取權限"; $arrMessage["resultMsg"]="請重新打開頁面"; }elseif ($unifiedOrderResult["return_code"] == "FAIL") { $arrMessage["resultType"]="網絡錯誤"; $arrMessage["resultMsg"]=$unifiedOrderResult['return_msg']; } elseif($unifiedOrderResult["result_code"] == "FAIL") { $arrMessage["resultType"]="訂單錯誤"; $arrMessage["resultMsg"]=$unifiedOrderResult['err_code_des']; } elseif($unifiedOrderResult[$field] != NULL) { $arrMessage["resultCode"]=1; $arrMessage["resultType"]="生成訂單"; $arrMessage["resultMsg"]="OK"; $arrMessage["resultField"] = $unifiedOrderResult[$field]; } return $arrMessage; } /** * 微信回調接口返回 驗證簽名并回應微信 * @param [type] $xml [description] * @return [type] [description] */ public function wxPayNotify($xml) { $notify = new Wxpay_server(); $notify->saveData($xml); //驗證簽名,并回復微信 //對后臺通知交互時,如果微信收到商戶的應答不是成功或者超時,微信認為通知失敗 //微信會通過一定的策略(如30分鐘共8次),定期重新發起通知 if ($notify->checkSign() == false) { $notify->setReturnParameter("return_code","FAIL");//返回狀態碼 $notify->setReturnParameter("return_msg","簽名失敗");//返回信息 } else { $notify->checkSign=TRUE; $notify->setReturnParameter("return_code","SUCCESS");//設置返回碼 } return $notify; } } /** * JSAPI支付——H5網頁端調起支付接口 */ class JsApi_handle extends JsApi_common { public $code;//code碼,用以獲取openid public $openid;//用戶的openid public $parameters;//jsapi參數,格式為json public $prepay_id;//使用統一支付接口得到的預支付id public $curl_timeout;//curl超時時間 function __construct() { //設置curl超時時間 $this->curl_timeout = WxPayConf::CURL_TIMEOUT; } /** * 生成獲取code的URL * @return [type] [description] */ public function createOauthUrlForCode() { //重定向URL $redirectUrl = "http://www.itcen.cn/wxpay/confirm/".$orderId."?showwxpaytitle=1"; $urlParams['appid'] = WxPayConf::APPID; $urlParams['redirect_uri'] = $redirectUrl; $urlParams['response_type'] = 'code'; $urlParams['scope'] = 'snsapi_base'; $urlParams['state'] = "STATE"."#wechat_redirect"; //拼接字符串 $queryString = $this->ToUrlParams($urlParams, false); return "https://open.weixin.qq.com/connect/oauth3/authorize?".$queryString; } /** * 設置code * @param [type] $code [description] */ public function setCode($code) { $this->code = $code; } /** * 作用:設置prepay_id */ public function setPrepayId($prepayId) { $this->prepay_id = $prepayId; } /** * 作用:獲取jsapi的參數 */ 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; } /** * 通過curl 向微信提交code 用以獲取openid * @return [type] [description] */ public function getOpenId() { //創建openid 的鏈接 $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); //執行curl $res = curl_exec($ch); curl_close($ch); //取出openid $data = json_decode($res); if (isset($data['openid'])) { $this->openid = $data['openid']; } else { return null; } return $this->openid; } /** * 生成可以獲取openid 的URL * @return [type] [description] */ public function createOauthUrlForOpenid() { $urlParams['appid'] = WxPayConf::APPID; $urlParams['secret'] = WxPayConf::APPSECRET; $urlParams['code'] = $this->code; $urlParams['grant_type'] = "authorization_code"; $queryString = $this->ToUrlParams($urlParams, false); return "https://api.weixin.qq.com/sns/oauth3/access_token?".$queryString; } } /** * 統一下單接口類 */ class UnifiedOrder_handle extends Wxpay_client_handle { public function __construct() { //設置接口鏈接 $this->url = "https://api.mch.weixin.qq.com/pay/unifiedorder"; //設置curl超時時間 $this->curl_timeout = WxPayConf::CURL_TIMEOUT; } } /** * 響應型接口基類 */ class Wxpay_server_handle extends JsApi_common{ public $data; //接收到的數據,類型為關聯數組 public $returnParams; //返回參數,類型為關聯數組 /** * 將微信請求的xml轉換成關聯數組 * @param [type] $xml [description] * @return [type] [description] */ public function saveData($xml) { $this->data = $this->xmlToArray($xml); } /** * 驗證簽名 * @return [type] [description] */ public function checkSign() { $tmpData = $this->data; unset($temData['sign']); $sign = $this->getSign($tmpData); if ($this->data['sign'] == $sign) { return true; } return false; } /** * 設置返回微信的xml數據 */ function setReturnParameter($parameter, $parameterValue) { $this->returnParameters[$this->trimString($parameter)] = $this->trimString($parameterValue); } /** * 將xml數據返回微信 */ function returnXml() { $returnXml = $this->createXml(); return $returnXml; } } /** * 請求型接口的基類 */ class Wxpay_client_handle extends JsApi_common{ public $params; //請求參數,類型為關聯數組 public $response; //微信返回的響應 public $result; //返回參數,類型類關聯數組 public $url; //接口鏈接 public $curl_timeout; //curl超時時間 /** * 設置請求參數 * @param [type] $param [description] * @param [type] $paramValue [description] */ public function setParam($param, $paramValue) { $this->params[$this->tirmString($param)] = $this->trimString($paramValue); } /** * 獲取結果,默認不使用證書 * @return [type] [description] */ public function getResult() { $this->postxml(); $this->result = $this->xmlToArray($this->response); return $this->result; } /** * post請求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['appid'] = WxPayConf::APPID; //公眾號ID $this->params['mch_id'] = WxPayConf::MCHID; //商戶號 $this->params['nonce_str'] = $this->createNoncestr(); //隨機字符串 $this->params['sign'] = $this->getSign($this->params); //簽名 return $this->arrayToXml($this->params); } } /** * 所有接口的基類 */ 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; } /** * 產生隨機字符串,不長于32位 * @param integer $length [description] * @return [type] [description] */ public function createNoncestr($length = 32) { $chars = "abcdefghijklmnopqrstuvwxyz0123456789"; $str = ''; for ($i = 0; $i < $length; $i++) { $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1); } return $str; } /** * 格式化參數 拼接字符串,簽名過程需要使用 * @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 .'='. $v .'&'; } $reqString = ''; if (strlen($buff) > 0) { $reqString = substr($buff, 0, strlen($buff) - 1); } return $reqString; } /** * 生成簽名 * @param [type] $params [description] * @return [type] [description] */ public function getSign($obj) { foreach ($obj as $k => $v) { $params[$k] = $v; } //簽名步驟一:按字典序排序參數 ksort($params); $str = $this->ToUrlParams($params, false); //簽名步驟二:在$str后加入key $str = $str."$key=".WxPayConf::KEY; //簽名步驟三:md5加密 $str = md5($str); //簽名步驟四:所有字符轉為大寫 $result = strtoupper($str); return $result; } /** * array轉xml * @param [type] $arr [description] * @return [type] [description] */ public function arrayToXml($arr) { $xml = "<xml>"; foreach ($arr as $k => $v) { if (is_numeric($val)) { $xml .= "<".$key.">".$key."</".$key.">"; } else { $xml .= "<".$key."><![CDATA[".$val."]]></".$key.">"; } } $xml .= "</xml>"; return $xml; } /** * 將xml轉為array * @param [type] $xml [description] * @return [type] [description] */ public function xmlToArray($xml) { $arr = json_decode(json_encode(simplexml_load_string($xml, 'SinpleXMLElement', LIBXML_NOCDATA)), true); return $arr; } /** * 以post方式提交xml到對應的接口 * @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 $ch = curl_init(); //設置超時 curl_setopt($ch, CURL_TIMEOUT, $second); curl_setopt($ch, CURL_URL, $url); //這里設置代理,如果有的話 //curl_setopt($ch,CURLOPT_PROXY, '8.8.8.8'); //curl_setopt($ch,CURLOPT_PROXYPORT, 8080); curl_setopt($ch, CURL_SSL_VERIFYHOST, FALSE); curl_setopt($ch, CURL_SSL_VERIFYPEER, FALSE); //設置header curl_setopt($ch, CURL_HEADER, FALSE); //要求結果為字符串且輸出到屏幕上 curl_setopt($ch, CURL_RETURNTRANSFER, TRUE); //以post方式提交 curl_setopt($ch, CURL_POST, TRUE); curl_setopt($ch, CURL_POSTFIELDS, $xml); //執行curl $res = curl_exec($ch); if ($res) { curl_close($ch); return $res; } else { $error = curl_errno($ch); echo "curl出錯,錯誤碼:$error"."<br>"; echo "<a href='http://curl.haxx.se/libcurl/c/libcurl-errors.html'>錯誤原因查詢</a></br>"; curl_close($ch); return false; } } } /** * 配置類 */ class WxPayConf { //微信公眾號身份的唯一標識。 const APPID = 'wx654a22c6423213b7'; //受理商ID,身份標識 const MCHID = '10043241'; const MCHNAME = 'KellyCen的博客'; //商戶支付密鑰Key。 const KEY = '0000000000000000000000000000000'; //JSAPI接口中獲取openid const APPSECRET = '000000000000000000000000000'; //證書路徑,注意應該填寫絕對路徑 const SSLCERT_PATH = '/home/WxPayCacert/apiclient_cert.pem'; const SSLKEY_PATH = '/home/WxPayCacert/apiclient_key.pem'; const SSLCA_PATH = '/home/WxPayCacert/rootca.pem'; //本例程通過curl使用HTTP POST方法,此處可修改其超時時間,默認為30秒 const CURL_TIMEOUT = 30; } Wxpay_model.php
Wxpay_model.php
獲取到code的URL后,將其分配到頁面去,讓用戶去點擊,用戶進行點擊后,就會從微信服務器獲取到code,然后回調到redirect_uri所指的地址去。
2、獲取到code后,會回調到redirect_uri所指向的地址去,這里是到了/Wxpay/confirm/,看看這個confirm方法是打算干嘛的:
/** * 手機端微信支付,此處是授權獲取到code時的回調地址 * @param [type] $orderId 訂單編號id * @return [type] [description] */ public function confirm($orderId) { //先確認用戶是否登錄 $this->ensureLogin(); //通過訂單編號獲取訂單數據 $order = $this->wxpay_model->get($orderId); //驗證訂單是否是當前用戶 $this->_verifyUser($order); //取得支付所需要的訂單數據 $orderData = $this->returnOrderData[$orderId]; //取得jsApi所需要的數據 $wxJsApiData = $this->wxpay_model->wxPayJsApi($orderData); //將數據分配到模板去,在js里使用 $this->smartyData['wxJsApiData'] = json_encode($wxJsApiData, JSON_UNESCAPED_UNICODE); $this->smartyData['order'] = $orderData; $this->displayView('wxpay/confirm.tpl'); }
這一步開始去取JSAPI支付接口所需要的數據了,這一步算是最主要的一步,這里還會調用統一下單接口獲取到prepay_id,我們跳到
$this->wxpay_model->wxPayJsApi($orderData) 看看:
/** * 微信jsapi點擊支付 * @param [type] $data [description] * @return [type] [description] */ public function wxPayJsApi($data) { $jsApi = new JsApi_handle(); //統一下單接口所需數據 $payData = $this->returnData($data); //獲取code碼,用以獲取openid $code = $_GET['code']; $jsApi->setCode($code); //通過code獲取openid $openid = $jsApi->getOpenId(); $unifiedOrderResult = null; if ($openid != null) { //取得統一下單接口返回的數據 $unifiedOrderResult = $this->getResult($payData, 'JSAPI', $openid); //獲取訂單接口狀態 $returnMessage = $this->returnMessage($unifiedOrder, 'prepay_id'); if ($returnMessage['resultCode']) { $jsApi->setPrepayId($retuenMessage['resultField']); //取得wxjsapi接口所需要的數據 $returnMessage['resultData'] = $jsApi->getParams(); } return $returnMessage; } }
這里首先是取得下單接口所需要的數據;
接著獲取到code碼,通過code碼獲取到openid;
然后調用統一下單接口,取得下單接口的響應數據,即prepay_id;
最后取得微信支付JSAPI所需要的數據。
這就是上面這個方法所要做的事情,取到數據后,會將數據分配到模板里,然后根據官方文檔所給的參考格式將其放在js里,如下面的代碼:
<!doctype html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <!-- Make sure that we can test against real IE8 --> <meta http-equiv="X-UA-Compatible" content="IE=8" /> <title></title> </head> <body> <a href="javascript:callpay();" id="btnOrder">點擊支付</a> </body> <script type="text/javascript"> //將數據付給js變量 var wxJsApiData = {$wxJsApiData}; function onBridgeReady() { //格式參考官方文檔 https://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=7_7&index=6 WeixinJSBridge.invoke( 'getBrandWCPayRequest', $.parseJSON(wxJsApiData.resultData), function(res){ if(res.err_msg == "get_brand_wcpay_request:ok" ){ window.location.href="/wxpay/paysuccess/"+{$order.sn}; } } ); } function callpay() { if(!wxJsApiData.resultCode){ alert(wxJsApiData.resultType+","+wxJsApiData.resultMsg+"!"); return false; } if (typeof WeixinJSBridge == "undefined"){ if( document.addEventListener ){ document.addEventListener('WeixinJSBridgeReady', onBridgeReady, false); }else if (document.attachEvent){ document.attachEvent('WeixinJSBridgeReady', onBridgeReady); document.attachEvent('onWeixinJSBridgeReady', onBridgeReady); } }else{ onBridgeReady(); } } </script> </html>
3、此時用戶只需要點擊支付,就可以開始進入支付界面了,接著就是輸入密碼,確認,最后會提示支付成功,緊接著網站會提供一個支付成功跳轉頁面。類似微信文檔里所提供的圖片這樣,這里我就直接截取文檔里的案例圖了:
4、這里還有一步,就是微信支付系統會異步通知網站后臺用戶的支付結果。在獲取統一下單數據時,我們指定了一個通知地址,在model里可以找到
支付成功后,微信支付系統會將支付結果異步發送到此地址上/Wxpay/pay_callback/ ,我們來看一下這個方法
/** * 支付回調接口 * @return [type] [description] */ public function pay_callback() { $postData = ''; 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['return_code'] == 'FAIL') { $payInfo['status'] = FALSE; $payInfo['msg'] = '通信出錯'; } elseif ($notify->data['result_code'] == 'FAIL') { $payInfo['status'] = FALSE; $payInfo['msg'] = '業務出錯'; } else { $payInfo['status'] = TRUE; $payInfo['msg'] = '支付成功'; $payInfo['sn']=substr($notify->data['out_trade_no'],8); $payInfo['order_no'] = $notify->data['out_trade_no']; $payInfo['platform_no']=$notify->data['transaction_id']; $payInfo['attach']=$notify->data['attach']; $payInfo['fee']=$notify->data['cash_fee']; $payInfo['currency']=$notify->data['fee_type']; $payInfo['user_sign']=$notify->data['openid']; } } $returnXml = $notify->returnXml(); echo $returnXml; $this->load->library('RedisCache'); if($payInfo['status']){ //這里要記錄到日志處理(略) $this->model->order->onPaySuccess($payInfo['sn'], $payInfo['order_no'], $payInfo['platform_no'],'', $payInfo['user_sign'], $payInfo); $this->redis->RedisCache->set('order:payNo:'.$payInfo['order_no'],'OK',5000); }else{ //這里要記錄到日志處理(略) $this->model->order->onPayFailure($payInfo['sn'], $payInfo['order_no'], $payInfo['platform_no'],'', $payInfo['user_sign'], $payInfo, '訂單支付失敗 ['.$payInfo['msg'].']'); } }
這方法就是對支付是否成功,對網站的支付相關邏輯進行后續處理,例如假如支付失敗,就需要記錄日志里說明此次交易失敗,或者是做某一些邏輯處理,而支付成功又該如何做處理,等等。
這里我們就分析下這個方法 $this->wxpay_model->wxPayNotify($postData); 對異步返回的數據進行安全性校驗,例如驗證簽名,看看model里的這個方法:
/** * 微信回調接口返回 驗證簽名并回應微信 * @param [type] $xml [description] * @return [type] [description] */ public function wxPayNotify($xml) { $notify = new Wxpay_server(); $notify->saveData($xml); //驗證簽名,并回復微信 //對后臺通知交互時,如果微信收到商戶的應答不是成功或者超時,微信認為通知失敗 //微信會通過一定的策略(如30分鐘共8次),定期重新發起通知 if ($notify->checkSign() == false) { $notify->setReturnParameter("return_code","FAIL");//返回狀態碼 $notify->setReturnParameter("return_msg","簽名失敗");//返回信息 } else { $notify->checkSign=TRUE; $notify->setReturnParameter("return_code","SUCCESS");//設置返回碼 } return $notify; }
如果驗證通過,則就開始進行交易成功或者失敗時所要做的邏輯處理了,這邏輯處理的代碼我就不寫了,因為每一個網站的處理方式都不一樣,我這里是這樣處理的,我把思路寫下,方便不懂的朋友可以按著我的思路去完善后續的處理:首先是查看數據庫里的訂單日志表,看這筆交易之前是否已經交易過了,交易過就不用再更新數據表了,如果沒交易過,就會將之前存在redis的訂單數據給取出來,再將這些數據插入到訂單日志表里,差不多就這樣處理。
好了,基于H5的微信支付接口開發詳解就講到這里,如果你認真理清博文里所講解的思路,自己基本上也可以嘗試開發此接口了,同時只要會了這個,你也基本上可以開發二維碼支付,刷卡支付等等的支付接口。
這里我附上此次開發中的完整代碼供大家閱讀:
<?php defined('BASEPATH') OR exit('No direct script access allowed'); class Wxpay extends MY_Controller { public function __construct() { parent::__construct(); $this->load->model('wxpay_model'); //$this->load->model('wxpay'); } public function index() { //微信支付 $this->smarty['wxPayUrl'] = $this->wxpay_model->retWxPayUrl(); $this->displayView('wxpay/index.tpl'); } /** * 手機端微信支付,此處是授權獲取到code時的回調地址 * @param [type] $orderId 訂單編號id * @return [type] [description] */ public function confirm($orderId) { //先確認用戶是否登錄 $this->ensureLogin(); //通過訂單編號獲取訂單數據 $order = $this->wxpay_model->get($orderId); //驗證訂單是否是當前用戶 $this->_verifyUser($order); //取得支付所需要的訂單數據 $orderData = $this->returnOrderData[$orderId]; //取得jsApi所需要的數據 $wxJsApiData = $this->wxpay_model->wxPayJsApi($orderData); //將數據分配到模板去,在js里使用 $this->smartyData['wxJsApiData'] = json_encode($wxJsApiData, JSON_UNESCAPED_UNICODE); $this->smartyData['order'] = $orderData; $this->displayView('wxpay/confirm.tpl'); } /** * 支付回調接口 * @return [type] [description] */ public function pay_callback() { $postData = ''; 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['return_code'] == 'FAIL') { $payInfo['status'] = FALSE; $payInfo['msg'] = '通信出錯'; } elseif ($notify->data['result_code'] == 'FAIL') { $payInfo['status'] = FALSE; $payInfo['msg'] = '業務出錯'; } else { $payInfo['status'] = TRUE; $payInfo['msg'] = '支付成功'; $payInfo['sn']=substr($notify->data['out_trade_no'],8); $payInfo['order_no'] = $notify->data['out_trade_no']; $payInfo['platform_no']=$notify->data['transaction_id']; $payInfo['attach']=$notify->data['attach']; $payInfo['fee']=$notify->data['cash_fee']; $payInfo['currency']=$notify->data['fee_type']; $payInfo['user_sign']=$notify->data['openid']; } } $returnXml = $notify->returnXml(); echo $returnXml; $this->load->library('RedisCache'); if($payInfo['status']){ //這里要記錄到日志處理(略) $this->model->order->onPaySuccess($payInfo['sn'], $payInfo['order_no'], $payInfo['platform_no'],'', $payInfo['user_sign'], $payInfo); $this->redis->RedisCache->set('order:payNo:'.$payInfo['order_no'],'OK',5000); }else{ //這里要記錄到日志處理(略) $this->model->order->onPayFailure($payInfo['sn'], $payInfo['order_no'], $payInfo['platform_no'],'', $payInfo['user_sign'], $payInfo, '訂單支付失敗 ['.$payInfo['msg'].']'); } } /** * 返回支付所需要的數據 * @param [type] $orderId 訂單號 * @param string $data 訂單數據,當$data數據存在時刷新$orderData緩存,因為訂單號不唯一 * @return [type] [description] */ public function returnOrderData($orderId, $data = '') { //獲取訂單數據 $order = $this->wxpay_model->get($orderId); if (0 === count($order)) return false; if (empty($data)) { $this->load->library('RedisCache'); //取得緩存在redis的訂單數據 $orderData = $this->rediscache->getJson("order:orderData:".$orderId); if (empty($orderData)) { //如果redis里沒有,則直接讀數據庫取 $this->load->model('order_model'); $order = $this->order_model->get($orderId); if (0 === count($order)) { return false; } $data = $order; } else { //如果redis里面有的話,直接返回數據 return $orderData; } } //支付前緩存所需要的數據 $orderData['id'] = $data['id']; $orderData['fee'] = $data['fee']; //支付平臺需要的數據 $orderData['user_id'] = $data['user_id']; $orderData['sn'] = $data['cn']; //這是唯一編號 $orderData['order_no'] = substr(md5($data['sn'].$data['fee']), 8, 8).$data['sn']; $orderData['fee'] = $data['fee']; $orderData['time'] = $data['time']; $orderData['goods_name'] = $data['goods_name']; $orderData['attach'] = $data['attach']; //將數據緩存到redis里面 $this->rediscache->set("order:orderData:".$orderId, $orderData, 3600*24); //做個標識緩存到redis,用以判斷該訂單是否已經支付了 $this->rediscache->set("order:payNo:".$orderData['order_no'], "NO", 3600*24); return $orderData; } private function _verifyUser($order) { if (empty($order)) show_404(); if (0 === count($order)) show_404(); //判斷訂單表里的用戶id是否是當前登錄者的id if ($order['user_id'] == $this->uid) return; show_error('只能查看自己的訂單'); } } 控制器:Wxpay.php
控制器:Wxpay.php
<?php defined('BASEPATH') OR exit('No direct script access allowed'); class Wxpay_model extends CI_Model { public function __construct() { parent::__construct(); } /** * 返回可以獲得微信code的URL (用以獲取openid) * @return [type] [description] */ public function retWxPayUrl() { $jsApi = new JsApi_handle(); return $jsApi->createOauthUrlForCode(); } /** * 微信jsapi點擊支付 * @param [type] $data [description] * @return [type] [description] */ public function wxPayJsApi($data) { $jsApi = new JsApi_handle(); //統一下單接口所需數據 $payData = $this->returnData($data); //獲取code碼,用以獲取openid $code = $_GET['code']; $jsApi->setCode($code); //通過code獲取openid $openid = $jsApi->getOpenId(); $unifiedOrderResult = null; if ($openid != null) { //取得統一下單接口返回的數據 $unifiedOrderResult = $this->getResult($payData, 'JSAPI', $openid); //獲取訂單接口狀態 $returnMessage = $this->returnMessage($unifiedOrder, 'prepay_id'); if ($returnMessage['resultCode']) { $jsApi->setPrepayId($retuenMessage['resultField']); //取得wxjsapi接口所需要的數據 $returnMessage['resultData'] = $jsApi->getParams(); } return $returnMessage; } } /** * 統一下單接口所需要的數據 * @param [type] $data [description] * @return [type] [description] */ public function returnData($data) { $payData['sn'] = $data['sn']; $payData['body'] = $data['goods_name']; $payData['out_trade_no'] = $data['order_no']; $payData['total_fee'] = $data['fee']; $payData['attach'] = $data['attach']; return $payData; } /** * 返回統一下單接口結果 (參考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('openid', $openid); } $unifiedOrder->setParam('body', $payData['body']); //商品描述 $unifiedOrder->setParam('out_trade_no', $payData['out_trade_no']); //商戶訂單號 $unifiedOrder->setParam('total_fee', $payData['total_fee']); //總金額 $unifiedOrder->setParam('attach', $payData['attach']); //附加數據 $unifiedOrder->setParam('notify_url', base_url('/Wxpay/pay_callback'));//通知地址 $unifiedOrder->setParam('trade_type', $trade_type); //交易類型 //非必填參數,商戶可根據實際情況選填 //$unifiedOrder->setParam("sub_mch_id","XXXX");//子商戶號 //$unifiedOrder->setParam("device_info","XXXX");//設備號 //$unifiedOrder->setParam("time_start","XXXX");//交易起始時間 //$unifiedOrder->setParam("time_expire","XXXX");//交易結束時間 //$unifiedOrder->setParam("goods_tag","XXXX");//商品標記 //$unifiedOrder->setParam("product_id","XXXX");//商品ID return $unifiedOrder->getResult(); } /** * 返回微信訂單狀態 */ public function returnMessage($unifiedOrderResult,$field){ $arrMessage=array("resultCode"=>0,"resultType"=>"獲取錯誤","resultMsg"=>"該字段為空"); if($unifiedOrderResult==null){ $arrMessage["resultType"]="未獲取權限"; $arrMessage["resultMsg"]="請重新打開頁面"; }elseif ($unifiedOrderResult["return_code"] == "FAIL") { $arrMessage["resultType"]="網絡錯誤"; $arrMessage["resultMsg"]=$unifiedOrderResult['return_msg']; } elseif($unifiedOrderResult["result_code"] == "FAIL") { $arrMessage["resultType"]="訂單錯誤"; $arrMessage["resultMsg"]=$unifiedOrderResult['err_code_des']; } elseif($unifiedOrderResult[$field] != NULL) { $arrMessage["resultCode"]=1; $arrMessage["resultType"]="生成訂單"; $arrMessage["resultMsg"]="OK"; $arrMessage["resultField"] = $unifiedOrderResult[$field]; } return $arrMessage; } /** * 微信回調接口返回 驗證簽名并回應微信 * @param [type] $xml [description] * @return [type] [description] */ public function wxPayNotify($xml) { $notify = new Wxpay_server(); $notify->saveData($xml); //驗證簽名,并回復微信 //對后臺通知交互時,如果微信收到商戶的應答不是成功或者超時,微信認為通知失敗 //微信會通過一定的策略(如30分鐘共8次),定期重新發起通知 if ($notify->checkSign() == false) { $notify->setReturnParameter("return_code","FAIL");//返回狀態碼 $notify->setReturnParameter("return_msg","簽名失敗");//返回信息 } else { $notify->checkSign=TRUE; $notify->setReturnParameter("return_code","SUCCESS");//設置返回碼 } return $notify; } } /** * JSAPI支付——H5網頁端調起支付接口 */ class JsApi_handle extends JsApi_common { public $code;//code碼,用以獲取openid public $openid;//用戶的openid public $parameters;//jsapi參數,格式為json public $prepay_id;//使用統一支付接口得到的預支付id public $curl_timeout;//curl超時時間 function __construct() { //設置curl超時時間 $this->curl_timeout = WxPayConf::CURL_TIMEOUT; } /** * 生成獲取code的URL * @return [type] [description] */ public function createOauthUrlForCode() { //重定向URL $redirectUrl = "http://www.itcen.cn/wxpay/confirm/".$orderId."?showwxpaytitle=1"; $urlParams['appid'] = WxPayConf::APPID; $urlParams['redirect_uri'] = $redirectUrl; $urlParams['response_type'] = 'code'; $urlParams['scope'] = 'snsapi_base'; $urlParams['state'] = "STATE"."#wechat_redirect"; //拼接字符串 $queryString = $this->ToUrlParams($urlParams, false); return "https://open.weixin.qq.com/connect/oauth3/authorize?".$queryString; } /** * 設置code * @param [type] $code [description] */ public function setCode($code) { $this->code = $code; } /** * 作用:設置prepay_id */ public function setPrepayId($prepayId) { $this->prepay_id = $prepayId; } /** * 作用:獲取jsapi的參數 */ 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; } /** * 通過curl 向微信提交code 用以獲取openid * @return [type] [description] */ public function getOpenId() { //創建openid 的鏈接 $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); //執行curl $res = curl_exec($ch); curl_close($ch); //取出openid $data = json_decode($res); if (isset($data['openid'])) { $this->openid = $data['openid']; } else { return null; } return $this->openid; } /** * 生成可以獲取openid 的URL * @return [type] [description] */ public function createOauthUrlForOpenid() { $urlParams['appid'] = WxPayConf::APPID; $urlParams['secret'] = WxPayConf::APPSECRET; $urlParams['code'] = $this->code; $urlParams['grant_type'] = "authorization_code"; $queryString = $this->ToUrlParams($urlParams, false); return "https://api.weixin.qq.com/sns/oauth3/access_token?".$queryString; } } /** * 統一下單接口類 */ class UnifiedOrder_handle extends Wxpay_client_handle { public function __construct() { //設置接口鏈接 $this->url = "https://api.mch.weixin.qq.com/pay/unifiedorder"; //設置curl超時時間 $this->curl_timeout = WxPayConf::CURL_TIMEOUT; } } /** * 響應型接口基類 */ class Wxpay_server_handle extends JsApi_common{ public $data; //接收到的數據,類型為關聯數組 public $returnParams; //返回參數,類型為關聯數組 /** * 將微信請求的xml轉換成關聯數組 * @param [type] $xml [description] * @return [type] [description] */ public function saveData($xml) { $this->data = $this->xmlToArray($xml); } /** * 驗證簽名 * @return [type] [description] */ public function checkSign() { $tmpData = $this->data; unset($temData['sign']); $sign = $this->getSign($tmpData); if ($this->data['sign'] == $sign) { return true; } return false; } /** * 設置返回微信的xml數據 */ function setReturnParameter($parameter, $parameterValue) { $this->returnParameters[$this->trimString($parameter)] = $this->trimString($parameterValue); } /** * 將xml數據返回微信 */ function returnXml() { $returnXml = $this->createXml(); return $returnXml; } } /** * 請求型接口的基類 */ class Wxpay_client_handle extends JsApi_common{ public $params; //請求參數,類型為關聯數組 public $response; //微信返回的響應 public $result; //返回參數,類型類關聯數組 public $url; //接口鏈接 public $curl_timeout; //curl超時時間 /** * 設置請求參數 * @param [type] $param [description] * @param [type] $paramValue [description] */ public function setParam($param, $paramValue) { $this->params[$this->tirmString($param)] = $this->trimString($paramValue); } /** * 獲取結果,默認不使用證書 * @return [type] [description] */ public function getResult() { $this->postxml(); $this->result = $this->xmlToArray($this->response); return $this->result; } /** * post請求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['appid'] = WxPayConf::APPID; //公眾號ID $this->params['mch_id'] = WxPayConf::MCHID; //商戶號 $this->params['nonce_str'] = $this->createNoncestr(); //隨機字符串 $this->params['sign'] = $this->getSign($this->params); //簽名 return $this->arrayToXml($this->params); } } /** * 所有接口的基類 */ 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; } /** * 產生隨機字符串,不長于32位 * @param integer $length [description] * @return [type] [description] */ public function createNoncestr($length = 32) { $chars = "abcdefghijklmnopqrstuvwxyz0123456789"; $str = ''; for ($i = 0; $i < $length; $i++) { $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1); } return $str; } /** * 格式化參數 拼接字符串,簽名過程需要使用 * @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 .'='. $v .'&'; } $reqString = ''; if (strlen($buff) > 0) { $reqString = substr($buff, 0, strlen($buff) - 1); } return $reqString; } /** * 生成簽名 * @param [type] $params [description] * @return [type] [description] */ public function getSign($obj) { foreach ($obj as $k => $v) { $params[$k] = $v; } //簽名步驟一:按字典序排序參數 ksort($params); $str = $this->ToUrlParams($params, false); //簽名步驟二:在$str后加入key $str = $str."$key=".WxPayConf::KEY; //簽名步驟三:md5加密 $str = md5($str); //簽名步驟四:所有字符轉為大寫 $result = strtoupper($str); return $result; } /** * array轉xml * @param [type] $arr [description] * @return [type] [description] */ public function arrayToXml($arr) { $xml = "<xml>"; foreach ($arr as $k => $v) { if (is_numeric($val)) { $xml .= "<".$key.">".$key."</".$key.">"; } else { $xml .= "<".$key."><![CDATA[".$val."]]></".$key.">"; } } $xml .= "</xml>"; return $xml; } /** * 將xml轉為array * @param [type] $xml [description] * @return [type] [description] */ public function xmlToArray($xml) { $arr = json_decode(json_encode(simplexml_load_string($xml, 'SinpleXMLElement', LIBXML_NOCDATA)), true); return $arr; } /** * 以post方式提交xml到對應的接口 * @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 $ch = curl_init(); //設置超時 curl_setopt($ch, CURL_TIMEOUT, $second); curl_setopt($ch, CURL_URL, $url); //這里設置代理,如果有的話 //curl_setopt($ch,CURLOPT_PROXY, '8.8.8.8'); //curl_setopt($ch,CURLOPT_PROXYPORT, 8080); curl_setopt($ch, CURL_SSL_VERIFYHOST, FALSE); curl_setopt($ch, CURL_SSL_VERIFYPEER, FALSE); //設置header curl_setopt($ch, CURL_HEADER, FALSE); //要求結果為字符串且輸出到屏幕上 curl_setopt($ch, CURL_RETURNTRANSFER, TRUE); //以post方式提交 curl_setopt($ch, CURL_POST, TRUE); curl_setopt($ch, CURL_POSTFIELDS, $xml); //執行curl $res = curl_exec($ch); if ($res) { curl_close($ch); return $res; } else { $error = curl_errno($ch); echo "curl出錯,錯誤碼:$error"."<br>"; echo "<a href='http://curl.haxx.se/libcurl/c/libcurl-errors.html'>錯誤原因查詢</a></br>"; curl_close($ch); return false; } } } /** * 配置類 */ class WxPayConf { //微信公眾號身份的唯一標識。 const APPID = 'wx654a22c6423213b7'; //受理商ID,身份標識 const MCHID = '10043241'; const MCHNAME = 'KellyCen的博客'; //商戶支付密鑰Key。 const KEY = '0000000000000000000000000000000'; //JSAPI接口中獲取openid const APPSECRET = '000000000000000000000000000'; //證書路徑,注意應該填寫絕對路徑 const SSLCERT_PATH = '/home/WxPayCacert/apiclient_cert.pem'; const SSLKEY_PATH = '/home/WxPayCacert/apiclient_key.pem'; const SSLCA_PATH = '/home/WxPayCacert/rootca.pem'; //本例程通過curl使用HTTP POST方法,此處可修改其超時時間,默認為30秒 const CURL_TIMEOUT = 30; } 模型:Wxpay_model.php
<!doctype html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <!-- Make sure that we can test against real IE8 --> <meta http-equiv="X-UA-Compatible" content="IE=8" /> <title></title> </head> <body> <a href="{$wxPayUrl}">微信支付</a> </body> </html> 視圖:index.tpl
<!doctype html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <!-- Make sure that we can test against real IE8 --> <meta http-equiv="X-UA-Compatible" content="IE=8" /> <title></title> </head> <body> <a href="javascript:callpay();" id="btnOrder">點擊支付</a> </body> <script type="text/javascript"> //將數據付給js變量 var wxJsApiData = {$wxJsApiData}; function onBridgeReady() { //格式參考官方文檔 https://pay.weixin.qq.com/wiki/doc/api/jsapi.php?chapter=7_7&index=6 WeixinJSBridge.invoke( 'getBrandWCPayRequest', $.parseJSON(wxJsApiData.resultData), function(res){ if(res.err_msg == "get_brand_wcpay_request:ok" ){ window.location.href="/wxpay/paysuccess/"+{$order.sn}; } } ); } function callpay() { if(!wxJsApiData.resultCode){ alert(wxJsApiData.resultType+","+wxJsApiData.resultMsg+"!"); return false; } if (typeof WeixinJSBridge == "undefined"){ if( document.addEventListener ){ document.addEventListener('WeixinJSBridgeReady', onBridgeReady, false); }else if (document.attachEvent){ document.attachEvent('WeixinJSBridgeReady', onBridgeReady); document.attachEvent('onWeixinJSBridgeReady', onBridgeReady); } }else{ onBridgeReady(); } } </script> </html> 視圖:confirm.tpl
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