Use WeChat public account to be careful.

New user subscription, will be pushed by a "hello2bizuser" text before, change to push a "subscribe" event.
This in PHP how to write Ah, I now have a public account, but people concerned about me, can not immediately send a message.

 Valid (); Class Wechatcallbackapitest{public function valid () {$echoStr = $_get["Echostr"];        Valid signature, option if ($this->checksignature ()) {echo $echoStr;        Exit }} Public Function responsemsg () {//get post data, could be due to the different environments$poststr = $GLOBALS ["      Http_raw_post_data "]; Extract Post Dataif (!empty ($POSTSTR)) {$POSTOBJ = simplexml_load_string ($postStr, ' SimpleX                Mlelement ', libxml_nocdata);                $fromUsername = $POSTOBJ->fromusername;                $toUsername = $POSTOBJ->tousername;                $keyword = Trim ($postObj->content);                $time = time (); $TEXTTPL = "
 
   
    
    %s 0 
    %s 
 
    
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    %s 
 
    
 
 
 
 
 
 

  
 ";                if (!empty ($keyword)) {$msgType = "text";                $CONTENTSTR = "Welcome to WeChat world!";                $RESULTSTR = sprintf ($TEXTTPL, $fromUsername, $toUsername, $time, $msgType, $CONTENTSTR);                Echo $resultStr;                }else{echo "Input something ...";        }}else {echo "";        Exit        }}private function Checksignature () {$signature = $_get["signature"];        $timestamp = $_get["timestamp"];        $nonce = $_get["nonce"]; $token = token, $TMPARR = Array ($token, $timestamp, $nonce), sort ($TMPARR), $tmpStr = implode ($TMPARR); $tmpStr = SHA1 ($tmp STR); if ($tmpStr = = $signature) {return true;} Else{return false;}}? >

This is the official demo, ask the Great God to teach

Reply to discussion (solution)

I sent it to you before number 26th. A text is a content in XML ...
The time you send after the event you are reading $keyword = Trim ($postObj->content); Change into
$keyword = Trim ($postObj->event); Then judge

NN now, thank you upstairs.

 Responsemsg (); class Wechatcallbackapitest{public function valid () {$echoStr = $_get["Echostr"];        Valid signature, option if ($this->checksignature ()) {echo $echoStr;        Exit }} Public Function responsemsg () {//get post data, could be due to the different environments$poststr = $GLOBALS ["      Http_raw_post_data "]; Extract Post Dataif (!empty ($POSTSTR)) {$POSTOBJ = simplexml_load_string ($postStr, ' SimpleX                Mlelement ', libxml_nocdata);                $fromUsername = $POSTOBJ->fromusername;          $toUsername = $POSTOBJ->tousername;          $msgType = Strtolower (Trim ($postObj->msgtype));          if ($msgType = = ' event ') {$keyword = Trim ($postObj->event);                }else{$keyword = Trim ($postObj->content);}                $time = time (); $TEXTTPL = "
 
   
    %s 
    
    %s 
    
   
    %s  
     %s 
     
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      0 
     
   
  
 "; if (!empty ($keyword)) {if ($keyword = = ' Subscribe ') {$contentStr = "even                  ";                  }else{$contentStr = "text";                } $msgType = "text";                $RESULTSTR = sprintf ($TEXTTPL, $fromUsername, $toUsername, $time, $msgType, $CONTENTSTR);                Echo $resultStr;                }else{echo "Input something ...";        }}else {echo "";        Exit        }}private function Checksignature () {$signature = $_get["signature"];        $timestamp = $_get["timestamp"];        $nonce = $_get["nonce"]; $token = token, $TMPARR = Array ($token, $timestamp, $nonce), sort ($TMPARR), $tmpStr = implode ($TMPARR); $tmpStr = SHA1 ($tmp STR); if ($tmpStr = = $signature) {return true;} Else{return false;}}? >

