各位大神 求微信关注后自动回复图文 PHP代码

我用的如下代码。。。不知道哪里错了 PHP小白 token验证是通过的 目的是关注公众号后自动发一个图文 求助啊 正确的应该怎么写

<?php
define("TOKEN", "weixin");

$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

$tmpstr = $postArr;

    //处理消息,并设置回复类型
    $postObj = simplexml_load_string($postArr);
    if(strtolower($postObj->MsgType)=='event'){


             if (strtolower($postObj->MsgType) == "text" && trim($postObj->Content == "单图文")){

          $toUser    =  $postObj->FromUserName;

          $fromUser  =  $postObj->ToUserName;

          $array = array(
              array(
                "title"=>"XXX",
                "description"=>"XXXXXXX",
                "picUrl"=>"httpXXXXn1.jpg",
                "url"=>"httpsXXX.com/",
              ),
          );

          $template  =  "<xml>
                        <ToUserName><![CDATA[%s]]></ToUserName>
                        <FromUserName><![CDATA[%s]]></FromUserName>
                        <CreateTime>%s</CreateTime>
                        <MsgType><![CDATA[%s]]></MsgType>
                        <ArticleCount>".count($array)."</ArticleCount>
                        <Articles>";

          foreach ($array as $key => $v) {
              $template  .= "<item>
                            <Title><![CDATA[".$v['title']."]]></Title>
                            <Description><![CDATA[".$v['description']."]]></Description>
                            <PicUrl><![CDATA[".$v['picUrl']."]]></PicUrl>
                            <Url><![CDATA[".$v['url']."]]></Url>
                            </item>";
          }


          $template.= "</Articles></xml>";

          $time     = time();

          echo  sprintf( $template,$toUser,$fromUser,$time,"news");
 }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;

    }

}

}

?>

https://www.cnblogs.com/xqschool/p/6745113.html

<?php
header("Content-type: text/html; charset=utf-8"); 
$nonce = $_GET['nonce'];
$token = 'winxin';
$timestamp = $_GET['timestamp'];
if (isset($_GET['echostr'])) {
    if (bindServerCheck()) {
        echo $_GET['echostr'];
    }
    exit();
}
responseMsg();

 //消息回复
function responseMsg() {
    //1.获取到微信推送过来post数据（xml格式）
    $postArr = $GLOBALS['HTTP_RAW_POST_DATA'];
    //2.处理消息类型，并设置回复类型和内容
    $postObj = simplexml_load_string($postArr, 'SimpleXMLElement', LIBXML_NOCDATA);
    //判断该数据包是否是订阅de事件推送
    if (strtolower($postObj->MsgType) == 'event') {
        //如果是关注 subscribe事件
        if (strtolower($postObj->Event) == 'subscribe') {
            $toUser = $postObj->FromUserName;
            $fromUser = $postObj->ToUserName;
            $time = time();
            $msgType = 'text';
            $content = '欢迎关注我的微信公众号 test 123';

 
             //修改为
              if (is_utf8($content)) {
                $content = $content;
              } else {
               $content = iconv('gb2312', 'UTF-8//IGNORE', $content);
              }

            $template = "
                            <![CDATA[%s]]>
                            <![CDATA[%s]]>
                            %s
                            <![CDATA[%s]]>
                            <![CDATA[%s]]>
                            ";
            $info = sprintf($template, $toUser, $fromUser, $time, $msgType, $content);
            echo $info;
        }
    }
}

// 开发者模式绑定校验
function bindServerCheck($token) {
    $signature = $_GET["signature"];
    $timestamp = $_GET["timestamp"];
    $nonce = $_GET["nonce"];
    $tmpArr = array(
        $token,
        $timestamp,
        $nonce
    );
    sort($tmpArr);
    $tmpStr = implode($tmpArr);
    $tmpStr = sha1($tmpStr);
    if ($tmpStr == $signature) {
        return true;
    } else {
        return false;
    }
}

  function to_utf8($in) 
{ 
        if (is_array($in)) { 
            foreach ($in as $key => $value) { 
                $out[to_utf8($key)] = to_utf8($value); 
            } 
        } elseif(is_string($in)) { 
            if(mb_detect_encoding($in) != "UTF-8") 
                return utf8_encode($in); 
            else 
                return $in; 
        } else { 
            return $in; 
        } 
        return $out; 
} 

 function is_utf8($str)
{
  return preg_match('//u', $str);
}

?>