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
     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/validToken: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 '
     
      
      
      
      
     ';    } else {        //订单状态已更新，直接返回        return '
     
      
      
      
      
     ';    }}3.微信支付类 WechatPay.php
     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 = "
     
      ";        foreach ($arr as $key => $val){            if (is_numeric($val)) {                $xml .= "<" . $key . ">" . $val . "
      ";            } else {                $xml .= "<" . $key . ">
      ";            }        }        $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
      $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;}