$signature = $_GET["signature"];
 $timestamp = $_GET["timestamp"];
 $nonce = $_GET["nonce"];
 $echostr=$_GET["echostr"];

 $token = TOKEN;//這里改成你第一步操作時填寫的token
 $tmpArr = array($token, $timestamp, $nonce);
 sort($tmpArr, SORT_STRING);
 $tmpStr = implode( $tmpArr );
 $tmpStr = sha1( $tmpStr );

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

<?php
//驗證signature
//$signature = $_GET["signature"];
//$timestamp = $_GET["timestamp"];
//$nonce = $_GET["nonce"];
//$echostr=$_GET["echostr"];
//
//$token = TOKEN;//這里改成你第一步操作時填寫的token
//$tmpArr = array($token, $timestamp, $nonce);
//sort($tmpArr, SORT_STRING);
//$tmpStr = implode( $tmpArr );
//$tmpStr = sha1( $tmpStr );
//
//if ($tmpStr == $signature ) {
// return $echostr;
//} else {
// return false;
//}
include_once './Xcxmsg.php';
$xcxmsg = new Xcxmsg();
$postStr = file_get_contents('php://input');
if (!$postStr)
 return false;
$postArr = json_decode($postStr, true);
if (!isset($postArr['MsgType']) || !isset($postArr['FromUserName']))
 return false;
$data = ["touser" => $postArr['FromUserName']];
$accessToken = $xcxmsg->getAccessToken();
$url = "https://api.weixin.qq.com/cgi-bin/message/custom/send?access_token=" . $accessToken;
switch ($postArr['MsgType']) {
 case "text":
 //如用戶發(fā)送的是文字信息，這里處理
 //回復圖文鏈接，也可以回復別的類型，根據(jù)需要
 $data['msgtype'] = "link";
 $data['link'] = [
  "title" => "hello",
  "description" => "Is Really A Happy Day",
  "url" => "LINK_URL",//連接url
  "thumb_url" =>"THUMB_URL" //圖片url
 ];
 $json = json_encode($data, JSON_UNESCAPED_UNICODE);
 $xcxmsg->curl($json, $url);
 break;
 case "image": //如用戶發(fā)送圖片消息，進入這里
 //服務端回復 圖片，也可以回復別的類型，根據(jù)需要
 $data['msgtype'] = "image";
 $data['image'] = ['media_id' => 'media_id值']; // 執(zhí)行 $xcxmsg->upload($accessToken)返回的 media_id
 $json = json_encode($data, JSON_UNESCAPED_UNICODE);
 $xcxmsg->curl($json, $url);
 case "miniprogrampage":
 //如用戶發(fā)送小程序卡片，進入這里
 //這里服務端回復小卡片，也可以回復別的類型，根據(jù)需要
 $data['msgtype'] = "miniprogrampage";
 $data['miniprogrampage'] = [
  "title" => "title",
  "pagepath" => "pages/index/index",
  "thumb_media_id" => "media_id值"];// 執(zhí)行 $xcxmsg->upload($accessToken)返回的 media_id
 $json = json_encode($data, JSON_UNESCAPED_UNICODE);
 $xcxmsg->curl($json, $url);
 break;
 case "event":
 //如用戶進入會話事件
 //這里可以回復文本
 $data['msgtype'] = "text";
 $data['text'] = [
  "content" => "Hello World",
  ];
 $json = json_encode($data, JSON_UNESCAPED_UNICODE);
 $xcxmsg->curl($json, $url);
 break;
 default:
}

<button open-type="contact" >客服消息</button>