如何对微信公众号基本配置

 <?php namespace appweixincontroller;use thinkController;define("TOKEN", "******");//这里要输入你的token值// $wechatObj = new wechatCallbackapiTest();// $wechatObj->valid();class Wx2 extends Controller {        public function index()      {          $echoStr = $_GET["echostr"];            //valid signature , option          if($this-&gt;checkSignature()){              ob_clean(); //丢弃缓存中的内容            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-&gt;FromUserName;                  $toUsername = $postObj-&gt;ToUserName;                  $keyword = trim($postObj-&gt;Content);                  $time = time();                  $textTpl = "<xml>                              <tousername></tousername>                              <fromusername></fromusername>                              <createtime>%s</createtime>                              <msgtype></msgtype>                              <content></content>                              <funcflag>0</funcflag>                              </xml>";                               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,SORT_STRING); 72         $tmpStr = implode( $tmpArr );          $tmpStr = sha1( $tmpStr );                    if( $tmpStr == $signature ){              return true;          }else{              return false;          }      }}