The problem of two-dimensional code band reference for the development scene of the WeChat public

postThe JSON data format is

{
    "action_name": "QR_LIMIT_SCENE",
    "action_info": {
        "scene": {
            "scene_id": 123
        }
    }
}

It is possible to generate a permanent parameter two-dimensional code with a parameter

https://mp.weixin.qq.com/cgi-…

We want to scan the two-dimensional code to recover the parameters of the public number in the two-dimensional code.
Then time
WeChat reply is

$postArr =$GLOBALS['HTTP_RAW_POST_DATA'];
$postObj = simplexml_load_string( $postArr );
    if($postObj->Event == 'SCAN'){
    $toUser   = $postObj->FromUserName;
    $fromUser = $postObj->ToUserName;
    $time     = time();
    $msgType  =  'text';
    $content  = 'Scavenging!'.$postObj-> EventKey;$template = "< xml>< ToUserName> <! [CDATA[%s]]> < /ToUserName>< FromUserName> <; [CDATA[%s]]> < /FromUserName>< CreateTime>%s< /CreateTime>< MsgType> <! [CDATA[%s]]> < /MsgType>< Content> <; [CDATA[%s]]> < /Content>< /xml> ";$info = sprintf ($template, $toUser, $fromUser, $time, $msgType, $content);Echo $info;

However, there is a public service failure after the scan. Please try again later.

What’s the problem