<?php/** * wechat php test *///define your tokendefine("TOKEN", "weixin");$wechatObj = new wechatCallbackapiTest();//$wechatObj->valid();$wechatObj->responseMsg();class wechatCallbackapiTest{ public function valid() {  $echoStr = $_GET["echostr"];  //valid signature , option  if($this->checkSignature()){   echo $echoStr;   exit;  } } public function responseMsg() {  //get post data, May be due to the different environments  $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];  //extract post data  if (!empty($postStr)){    $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);    $fromUsername = $postObj->FromUserName;    $toUsername = $postObj->ToUserName;    $keyword = trim($postObj->Content);    $time = time();    $textTpl = "<xml>       <ToUserName><![CDATA[%s]]></ToUserName>       <FromUserName><![CDATA[%s]]></FromUserName>       <CreateTime>%s</CreateTime>       <MsgType><![CDATA[%s]]></MsgType>       <Content><![CDATA[%s]]></Content>       <FuncFlag>0</FuncFlag>       </xml>";        if(!empty( $keyword ))    {     $msgType = "text";     if($keyword=="1"){     $contentStr = "qiphon";}     if($keyword=="2"){     $contentStr = "最新資訊：《環境違法行為舉報獎勵辦法》";}     if($keyword=="3"){     $contentStr = "31離婚協議/n32租房合同/n33交通事故協議書";}          $resultStr = sprintf($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( $tmpStr );  if( $tmpStr == $signature ){   return true;  }else{   return false;  } }}?>