微信公众消息开发wx_sample.php没有自动回复。求大神解决下。

今天注册了微信公众开发者，用了官网给的接口文件，但是用微信发消息没有自动回复。wx_sample.php内容：
<?php
/**
* wechat php test
*/

//define your token
define("TOKEN", "ldge331");
$wechatObj = new wechatCallbackapiTest();
$wechatObj->valid();

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";
$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);
$tmpStr = implode( $tmpArr );
$tmpStr = sha1( $tmpStr );

if( $tmpStr == $signature ){
return true;
}else{
return false;
}
}
}

?>

服务器没有问题，用了微信测试工具测试了下是能正常请求的：
200 OK
Connection: close
Date: Sun, 27 Jul 2014 09:17:51 GMT
X-Powered-By: ASP.NET
Server: Microsoft-IIS/6.0
Content-Type: text/html

提示:
请求成功

因为这个示例只调用了校验的方法没有调用回复的方法

<?php
/**
  * wechat php test
  */

//define your token
define("TOKEN", "ldge331");
$wechatObj = new wechatCallbackapiTest();
//$wechatObj->valid();这里调用了校验的方法,验证完url后注释掉就行了


/*这样调用回复的方法，具体什么逻辑修改responseMsg函数*/
$wechatObj->responseMsg();


class wechatCallbackapiTest
{
public function valid()
    {
        $echoStr = $_GET["echostr"];

        //valid signature , option
        if($this->checkSignature()){
         echo $echoStr;
         exit;
        }
    }

    public function responseMsg()//这是回复信息的方法
    {
//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);
$tmpStr = implode( $tmpArr );
$tmpStr = sha1( $tmpStr );

if( $tmpStr == $signature ){
return true;
}else{
return false;
}
}
}

?>

温馨提示：内容为网友见解，仅供参考

当前网址：https://22.t2y.org/zz/c6hfiiic0cit6s6c0sh.html