如何对微信公众号基本配置

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<?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->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->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";  
                    $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;  
        }  
    }


}