Yii2.0实现微信公众号后台开发

本文内容较多，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！另外本文的分章节版本可以在 八宝粥的博客 找到。

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 = '';        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['wechat']['token'];          if (!$token) {              echo 'TOKEN is not defined!';          } 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, 'SimpleXMLElement', LIBXML_NOCDATA);      //      if ($postObj === false) {          die('parse xml error');      }      if ($postObj->return_code != 'SUCCESS') {          die($postObj->return_msg);      }      if ($postObj->result_code != 'SUCCESS') {          die($postObj->err_code);      }        //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);        //验证签名      $arr = (array)$postObj;      unset($arr['sign']);      if ($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      $orders = Order::find()->where(['uid'=>$postObj->openid, 'oid'=>$postObj->out_trade_no, 'status' => 0])->all();        if(count($orders) > 0){          //更新订单状态          foreach ($orders as $order) {              //更新订单              $order['status'] = 1;              $order->update();          }          return '<xml><return_code><![CDATA[SUCCESS]]></return_code><return_msg><![CDATA[OK]]></return_msg></xml>';      } else {          //订单状态已更新，直接返回          return '<xml><return_code><![CDATA[SUCCESS]]></return_code><return_msg><![CDATA[OK]]></return_msg></xml>';      }  }

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(              'mch_id' => $this->mchid,              'appid' => $this->appid,              'key' => $this->key,          );          $unified = array(              'appid' => $config['appid'],              'attach' => '支付',              'body' => $orderName,              'mch_id' => $config['mch_id'],              'nonce_str' => self::createNonceStr(),              'notify_url' => $notifyUrl,              'openid' => $openid,              'out_trade_no' => $outTradeNo,              'spbill_create_ip' => '127.0.0.1',              'total_fee' => intval($totalFee * 100),              'trade_type' => 'JSAPI',          );          $unified['sign'] = self::getSign($unified, $config['key']);          $responseXml = self::curlPost('https://api.mch.weixin.qq.com/pay/unifiedorder', self::arrayToXml($unified));          $unifiedOrder = simplexml_load_string($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,              "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 = '', $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 = '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;      }    }

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=".$nonceStr."×tamp=".$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 = $redis->get('wechat:jsapi_ticket');          if ($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('wechat:jsapi_ticket', $ticket);                  $redis->expire('wechat:jsapi_ticket', 7000);              }          }          return $ticket;      }        public static function getAccessToken() {          //使用Redis缓存 access_token          $redis = Yii::$app->redis;          $redis_token = $redis->get('wechat:access_token');          if ($redis_token) {              $access_token = $redis_token;          } else {              $appid = Yii::$app->params['wechat']['appid'];              $appsecret = Yii::$app->params['wechat']['appsecret'];              $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=".$appid."&secret=".$appsecret;              $res = json_decode(self::curlGet($url));              $access_token = $res->access_token;              if ($access_token) {                  $redis->set('wechat:access_token', $access_token);                  $redis->expire('wechat:access_token', 7000);              }          }          return $access_token;      }        public static function curlGet($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 = '', $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 = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';          $str = '';          for ($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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