微信自动回复-安全模式-消息加解密方式

    public function WxToken(Request $request)
    {
        if (!empty($request->echostr)) {
            $nonce = $request->input('nonce');
            $echostr = $request->input('echostr');
            $token = config('type.wechat.Token');
            $timestamp = $request->input('timestamp');
            $signature = $request->input('signature');
            $array = array($token, $timestamp, $nonce);
            sort($array, SORT_STRING);
            $str = sha1(implode($array));
            echo $echostr;
        } else {
            $msg_signature = $request->input('msg_signature');
            $nonce = $request->input('nonce');
            $timestamp = $request->input['timestamp'];
            $postStr = file_get_contents("php://input");
            $postArr = json_decode(json_encode(simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA)), true);
            $encryptData = $postArr['Encrypt'];
            //自动回复
            $this->AutoResponseMsg($msg_signature, $timestamp, $encryptData, $nonce);
        }
    }
    /**
     * 自动回复
     */
    public function AutoResponseMsg($msg_signature, $timestamp, $encryptData, $nonce)
    {
        $token = config('type.wechat.Token');
        $encodingAesKey = config('type.wechat.EncodingAESKey');
        $appId = config('type.wechat.AppID');
        $pc = new WXBizMsgCryptTool($token, $encodingAesKey, $appId);
        $decryptData = '';
        $errCode = $pc->decryptMsg($msg_signature, $timestamp, $nonce, $encryptData, $decryptData);

        Logger::info('code', ['code' => $errCode], 'code');
        if ($errCode == 0) {
            // 解密成功，处理消息
            $res = json_decode(json_encode(simplexml_load_string($decryptData, 'SimpleXMLElement', LIBXML_NOCDATA)), true);
            $FromUserName = $res['FromUserName']; //获取发送方帐号（OpenID）
            $ToUserName = $res['ToUserName']; //获取接收方账号
            $html = "自定义回复文本";
            echo $this->txt($html, $FromUserName, $ToUserName);
            exit();
            // TODO: 处理消息
        } else {
            exit('Decrypt error');
        }
    }


    public function txt($content, $FromUserName, $ToUserName)
    {
        $time = time();
        $xml = "<xml>
              <ToUserName><![CDATA[{$FromUserName}]]></ToUserName>
              <FromUserName><![CDATA[{$ToUserName}]]></FromUserName>
              <CreateTime>{$time}</CreateTime>
              <MsgType><![CDATA[text]]></MsgType>
              <Content><![CDATA[{$content}]]></Content>
            </xml>";
        return $xml;
    }

WXBizMsgCryptTool文件

链接：https://pan.baidu.com/s/1iSCpbXI7mf7kZ7G3Er_fAg 
提取码：prv0 

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