PHP后台开发微信公众号实例

本文主要和大家分享PHP后台开发微信公众号实例，包括微信接入、获取微信用户信息、微信支付、JSSDK配置参数获取等部分。如果读者对微信开发没有一个主观上的认识，那么建议读者先研读微信公众平台开发者文档，然后再阅读本文，效果更佳！

微信开发的完整例子已经整理在Github，欢迎查看： yii2-wechat-demo。【八宝粥的博客】

接入微信

Yii2后台配置

1.在app/config/params.php中配置token参数

return [ //微信接入 'wechat' =>[ 'token' => 'your token', ], ];

2.在app/config/main.php中配置路由

因为接口模块使用的RESTful API，所以需要定义路由规则。

'urlManager' => [ 'enablePrettyUrl' => true, 'enableStrictParsing' => true, 'showScriptName' => false, 'rules' => [ [ 'class' => 'yii\rest\UrlRule', 'controller' => 'wechat', 'extraPatterns' => [ 'GET valid' => 'valid', ], ], ], ],

3.在app/controllers中新建WechatController

<?php namespace api\controllers; use Yii; use yii\rest\ActiveController; class WechatController extends ActiveController { public $modelClass = &#39;&#39;; public function actionValid() { $echoStr = $_GET["echostr"]; $signature = $_GET["signature"]; $timestamp = $_GET["timestamp"]; $nonce = $_GET["nonce"]; //valid signature , option if($this->checkSignature($signature,$timestamp,$nonce)){ echo $echoStr; } } private function checkSignature($signature,$timestamp,$nonce) { // you must define TOKEN by yourself $token = Yii::$app->params[&#39;wechat&#39;][&#39;token&#39;]; if (!$token) { echo &#39;TOKEN is not defined!&#39;; } else { $tmpArr = array($token, $timestamp, $nonce); // use SORT_STRING rule sort($tmpArr, SORT_STRING); $tmpStr = implode( $tmpArr ); $tmpStr = sha1( $tmpStr ); if( $tmpStr == $signature ){ return true; }else{ return false; } } } }

微信公众号后台配置

在微信公众号后台配置URL和Token，然后提交验证即可。

URL:http://app.demo.com/wechats/valid Token:your token

获取用户信息

用户表设计

CREATE TABLE `wechat_user` ( `id` int(11) NOT NULL, `openid` varchar(255) COLLATE utf8_unicode_ci NOT NULL, `nickname` varchar(50) COLLATE utf8_unicode_ci NOT NULL COMMENT '微信昵称', `sex` tinyint(4) NOT NULL COMMENT '性别', `headimgurl` varchar(255) COLLATE utf8_unicode_ci NOT NULL COMMENT '头像', `country` varchar(50) COLLATE utf8_unicode_ci NOT NULL COMMENT '国家', `province` varchar(50) COLLATE utf8_unicode_ci NOT NULL COMMENT '省份', `city` varchar(50) COLLATE utf8_unicode_ci NOT NULL COMMENT '城市', `access_token` varchar(255) COLLATE utf8_unicode_ci NOT NULL, `refresh_token` varchar(255) COLLATE utf8_unicode_ci NOT NULL, `created_at` timestamp NULL DEFAULT CURRENT_TIMESTAMP ) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci; ALTER TABLE `wechat_user` ADD PRIMARY KEY (`id`);

获取用户信息的相关接口

1.用户授权接口：获取access_token、openid等；获取并保存用户资料到数据库

public function actionAccesstoken() { $code = $_GET["code"]; $state = $_GET["state"]; $appid = Yii::$app->params['wechat']['appid']; $appsecret = Yii::$app->params['wechat']['appsecret']; $request_url = 'https://api.weixin.qq.com/sns/oauth2/access_token?appid='.$appid.'&secret='.$appsecret.'&code='.$code.'&grant_type=authorization_code'; //初始化一个curl会话 $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, $request_url); curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); $result = curl_exec($ch); curl_close($ch); $result = $this->response($result); //获取token和openid成功，数据解析 $access_token = $result['access_token']; $refresh_token = $result['refresh_token']; $openid = $result['openid']; //请求微信接口，获取用户信息 $userInfo = $this->getUserInfo($access_token,$openid); $user_check = WechatUser::find()->where(['openid'=>$openid])->one(); if ($user_check) { //更新用户资料 } else { //保存用户资料 } //前端网页的重定向 if ($openid) { return $this->redirect($state.$openid); } else { return $this->redirect($state); } }

2.从微信获取用户资料

public function getUserInfo($access_token,$openid) { $request_url = 'https://api.weixin.qq.com/sns/userinfo?access_token='.$access_token.'&openid='.$openid.'&lang=zh_CN'; //初始化一个curl会话 $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, $request_url); curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); $result = curl_exec($ch); curl_close($ch); $result = $this->response($result); return $result; }

3.获取用户资料接口

public function actionUserinfo() { if(isset($_REQUEST["openid"])){ $openid = $_REQUEST["openid"]; $user = WechatUser::find()->where(['openid'=>$openid])->one(); if ($user) { $result['error'] = 0; $result['msg'] = '获取成功'; $result['user'] = $user; } else { $result['error'] = 1; $result['msg'] = '没有该用户'; } } else { $result['error'] = 1; $result['msg'] = 'openid为空'; } return $result; }

微信支付

1.微信支付接口：打包支付数据

public function actionPay(){ if(isset($_REQUEST["uid"])&&isset($_REQUEST["oid"])&&isset($_REQUEST["totalFee"])){ //uid、oid、totalFee $uid = $_REQUEST["uid"]; $oid = $_REQUEST["oid"]; $totalFee = $_REQUEST["totalFee"]; $timestamp = time(); //微信支付参数 $appid = Yii::$app->params['wechat']['appid']; $mchid = Yii::$app->params['wechat']['mchid']; $key = Yii::$app->params['wechat']['key']; $notifyUrl = Yii::$app->params['wechat']['notifyUrl']; //支付打包 $wx_pay = new WechatPay($mchid, $appid, $key); $package = $wx_pay->createJsBizPackage($uid, $totalFee, $oid, $notifyUrl, $timestamp); $result['error'] = 0; $result['msg'] = '支付打包成功'; $result['package'] = $package; return $result; }else{ $result['error'] = 1; $result['msg'] = '请求参数错误'; } return $result; }

2.接收微信发送的异步支付结果通知

public function actionNotify(){ $postStr = $GLOBALS["HTTP_RAW_POST_DATA"]; $postObj = simplexml_load_string($postStr, &#39;SimpleXMLElement&#39;, LIBXML_NOCDATA); // if ($postObj === false) { die(&#39;parse xml error&#39;); } if ($postObj->return_code != &#39;SUCCESS&#39;) { die($postObj->return_msg); } if ($postObj->result_code != &#39;SUCCESS&#39;) { die($postObj->err_code); } //微信支付参数 $appid = Yii::$app->params[&#39;wechat&#39;][&#39;appid&#39;]; $mchid = Yii::$app->params[&#39;wechat&#39;][&#39;mchid&#39;]; $key = Yii::$app->params[&#39;wechat&#39;][&#39;key&#39;]; $wx_pay = new WechatPay($mchid, $appid, $key); //验证签名 $arr = (array)$postObj; unset($arr[&#39;sign&#39;]); if ($wx_pay->getSign($arr, $key) != $postObj->sign) { die("签名错误"); } //支付处理正确-判断是否已处理过支付状态 $orders = Order::find()->where([&#39;uid&#39;=>$postObj->openid, &#39;oid&#39;=>$postObj->out_trade_no, &#39;status&#39; => 0])->all(); if(count($orders) > 0){ //更新订单状态 foreach ($orders as $order) { //更新订单 $order[&#39;status&#39;] = 1; $order->update(); } return &#39;<xml><return_code><![CDATA[SUCCESS]]></return_code><return_msg><![CDATA[OK]]></return_msg></xml>&#39;; } else { //订单状态已更新，直接返回 return &#39;<xml><return_code><![CDATA[SUCCESS]]></return_code><return_msg><![CDATA[OK]]></return_msg></xml>&#39;; } }

3.微信支付类 WechatPay.php

<?php namespace api\sdk; use Yii; class WechatPay { protected $mchid; protected $appid; protected $key; public function __construct($mchid, $appid, $key){ $this->mchid = $mchid; $this->appid = $appid; $this->key = $key; } public function createJsBizPackage($openid, $totalFee, $outTradeNo, $orderName, $notifyUrl, $timestamp){ $config = array( &#39;mch_id&#39; => $this->mchid, &#39;appid&#39; => $this->appid, &#39;key&#39; => $this->key, ); $unified = array( &#39;appid&#39; => $config[&#39;appid&#39;], &#39;attach&#39; => &#39;支付&#39;, &#39;body&#39; => $orderName, &#39;mch_id&#39; => $config[&#39;mch_id&#39;], &#39;nonce_str&#39; => self::createNonceStr(), &#39;notify_url&#39; => $notifyUrl, &#39;openid&#39; => $openid, &#39;out_trade_no&#39; => $outTradeNo, &#39;spbill_create_ip&#39; => &#39;127.0.0.1&#39;, &#39;total_fee&#39; => intval($totalFee * 100), &#39;trade_type&#39; => &#39;JSAPI&#39;, ); $unified[&#39;sign&#39;] = self::getSign($unified, $config[&#39;key&#39;]); $responseXml = self::curlPost(&#39;https://api.mch.weixin.qq.com/pay/unifiedorder&#39;, self::arrayToXml($unified)); $unifiedOrder = simplexml_load_string($responseXml, &#39;SimpleXMLElement&#39;, LIBXML_NOCDATA); if ($unifiedOrder === false) { die(&#39;parse xml error&#39;); } if ($unifiedOrder->return_code != &#39;SUCCESS&#39;) { die($unifiedOrder->return_msg); } if ($unifiedOrder->result_code != &#39;SUCCESS&#39;) { die($unifiedOrder->err_code); } $arr = array( "appId" => $config[&#39;appid&#39;], "timeStamp" => $timestamp, "nonceStr" => self::createNonceStr(), "package" => "prepay_id=" . $unifiedOrder->prepay_id, "signType" => &#39;MD5&#39;, ); $arr[&#39;paySign&#39;] = self::getSign($arr, $config[&#39;key&#39;]); return $arr; } public static function curlGet($url = &#39;&#39;, $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, $options); } //https请求 不验证证书和host curl_setopt($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 = &#39;&#39;, $postData = &#39;&#39;, $options = array()){ if (is_array($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, $options); } //https请求 不验证证书和host curl_setopt($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 = &#39;abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789&#39;; $str = &#39;&#39;; for ($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 . "&"; } } $reqPar = &#39;&#39;; if (strlen($buff)>0) { $reqPar = substr($buff, 0, strlen($buff) - 1); } return $reqPar; } }

获取JS-SDK的config参数

根据微信公众平台开发者文档：

所有需要使用JS-SDK的页面必须先注入配置信息，否则将无法调用（同一个url仅需调用一次，对于变化url的SPA的web app可在每次url变化时进行调用,目前Android微信客户端不支持pushState的H5新特性，所以使用pushState来实现web app的页面会导致签名失败，此问题会在Android6.2中修复）。

即：

wx.config({ debug: true, // 开启调试模式,调用的所有api的返回值会在客户端alert出来，若要查看传入的参数，可以在pc端打开，参数信息会通过log打出，仅在pc端时才会打印。 appId: '', // 必填，公众号的唯一标识 timestamp: , // 必填，生成签名的时间戳 nonceStr: '', // 必填，生成签名的随机串 signature: '',// 必填，签名，见附录1 jsApiList: [] // 必填，需要使用的JS接口列表，所有JS接口列表见附录2 });

1.微信支付类 WechatPay.php

<?php namespace api\sdk; use Yii; class WechatPay { public function getSignPackage($url) { $jsapiTicket = self::getJsApiTicket(); $timestamp = time(); $nonceStr = self::createNonceStr(); // 这里参数的顺序要按照 key 值 ASCII 码升序排序 $string = "jsapi_ticket=".$jsapiTicket."&noncestr=".$nonceStr."&timestamp=".$timestamp."&url=".$url; $signature = sha1($string); $signPackage = array( "appId" => $this->appid, "nonceStr" => $nonceStr, "timestamp" => $timestamp, "url" => $url, "signature" => $signature, "rawString" => $string ); return $signPackage; } public static function getJsApiTicket() { //使用Redis缓存 jsapi_ticket $redis = Yii::$app->redis; $redis_ticket = $redis->get(&#39;wechat:jsapi_ticket&#39;); if ($redis_ticket) { $ticket = $redis_ticket; } else { $accessToken = self::getAccessToken(); $url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?type=jsapi&access_token=".$accessToken; $res = json_decode(self::curlGet($url)); $ticket = $res->ticket; if ($ticket) { $redis->set(&#39;wechat:jsapi_ticket&#39;, $ticket); $redis->expire(&#39;wechat:jsapi_ticket&#39;, 7000); } } return $ticket; } public static function getAccessToken() { //使用Redis缓存 access_token $redis = Yii::$app->redis; $redis_token = $redis->get(&#39;wechat:access_token&#39;); if ($redis_token) { $access_token = $redis_token; } else { $appid = Yii::$app->params[&#39;wechat&#39;][&#39;appid&#39;]; $appsecret = Yii::$app->params[&#39;wechat&#39;][&#39;appsecret&#39;]; $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=".$appid."&secret=".$appsecret; $res = json_decode(self::curlGet($url)); $access_token = $res->access_token; if ($access_token) { $redis->set(&#39;wechat:access_token&#39;, $access_token); $redis->expire(&#39;wechat:access_token&#39;, 7000); } } return $access_token; } public static function curlGet($url = &#39;&#39;, $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, $options); } //https请求 不验证证书和host curl_setopt($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 = &#39;&#39;, $postData = &#39;&#39;, $options = array()){ if (is_array($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, $options); } //https请求 不验证证书和host curl_setopt($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 = &#39;abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789&#39;; $str = &#39;&#39;; for ($i = 0; $i<$length; $i++){ $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1); } return $str; } }

2.获取config参数接口

public function actionConfig(){ if (isset($_REQUEST['url'])) { $url = $_REQUEST['url']; //微信支付参数 $appid = Yii::$app->params['wechat']['appid']; $mchid = Yii::$app->params['wechat']['mchid']; $key = Yii::$app->params['wechat']['key']; $wx_pay = new WechatPay($mchid, $appid, $key); $package = $wx_pay->getSignPackage($url); $result['error'] = 0; $result['msg'] = '获取成功'; $result['config'] = $package; } else { $result['error'] = 1; $result['msg'] = '参数错误'; } return $result; }

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