WeChat public account development xml: Xml fields error, please check your response xml!

php code is as follows tp framework

responseMsg();
      }
    }
    public function responseMsg()
    {
    //get post data, May be due to the different environments
    $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];
    // $tmpstr = $postStr;
    libxml_disable_entity_loader(true);
    $postObj = simplexml_load_string($postStr,'SimpleXMLElement', LIBXML_NOCDATA);
    //extract post data
    if (strtolower( $postObj->MsgType ) == 'event'){
                /* libxml_disable_entity_loader is to prevent XML eXternal Entity Injection,
                   the best way is to check the validity of xml by yourself */
                   if (strtolower( $postObj->Event == 'subscribe')) {
                     $toUsername = $postObj->FromUserName;
                     $fromUsername = $postObj->ToUserName;
                     $time = time();
                     $MsgType = 'text';
                     $content = "欢迎访问我的公众号";
                     $textTpl = "%s";
                     $info = sprintf($textTpl,$toUsername,$fromUsername,$time,$MsgType,$content);
                     echo $info;
                   }
        }
    }
}

The test results are as follows:

http://120.27.115.59/wechat.php/Home/Index/wechat
成功或失败:
Decrypt Fail!  
错误原因:
Xml fields error, please check your response xml! 
状态码：
200    OK 
Headers：
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Connection: Keep-Alive
Date: Tue, 23 Aug 2016 10:23:34 GMT
X-Powered-By: PHP/5.5.9-1ubuntu4.14
Set-Cookie: PHPSESSID=4tlrj4jd7cgoo3ueaigc6753q7; path=/
Pragma: no-cache
Server: Apache/2.4.7 (Ubuntu)
Vary: Accept-Encoding
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Content-Type: text/html
Content-Length: 239
 
解密前xml:1471947814解密后xml:

Reply content:

php code is as follows tp framework

responseMsg();
      }
    }
    public function responseMsg()
    {
    //get post data, May be due to the different environments
    $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];
    // $tmpstr = $postStr;
    libxml_disable_entity_loader(true);
    $postObj = simplexml_load_string($postStr,'SimpleXMLElement', LIBXML_NOCDATA);
    //extract post data
    if (strtolower( $postObj->MsgType ) == 'event'){
                /* libxml_disable_entity_loader is to prevent XML eXternal Entity Injection,
                   the best way is to check the validity of xml by yourself */
                   if (strtolower( $postObj->Event == 'subscribe')) {
                     $toUsername = $postObj->FromUserName;
                     $fromUsername = $postObj->ToUserName;
                     $time = time();
                     $MsgType = 'text';
                     $content = "欢迎访问我的公众号";
                     $textTpl = "%s";
                     $info = sprintf($textTpl,$toUsername,$fromUsername,$time,$MsgType,$content);
                     echo $info;
                   }
        }
    }
}

test results are as follows:

http://120.27.115.59/wechat.php/Home/Index/wechat
成功或失败:
Decrypt Fail!  
错误原因:
Xml fields error, please check your response xml! 
状态码：
200    OK 
Headers：
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Connection: Keep-Alive
Date: Tue, 23 Aug 2016 10:23:34 GMT
X-Powered-By: PHP/5.5.9-1ubuntu4.14
Set-Cookie: PHPSESSID=4tlrj4jd7cgoo3ueaigc6753q7; path=/
Pragma: no-cache
Server: Apache/2.4.7 (Ubuntu)
Vary: Accept-Encoding
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Content-Type: text/html
Content-Length: 239
 
解密前xml:1471947814解密后xml:

Solved. . It seems to be a problem with TP