用户在关注与取消关注公众号时, 微信会把这个事件推送到开发者填写的 URL 方便开发者给用户下发欢迎消息或者做帐号的解绑
下面是一个微信公众平台关注和取消关注的实例:
- <?php
- define("TOKEN", "w3note"); // 定义识别码
- $wechatObj = new wechatCallbackapiTest(); // 实例化 wechatCallbackapiTest 类
- if (!isset($_GET["echostr"])) {
- $wechatObj--->responseMsg();
- } else {
- $wechatObj->valid();
- }
- class wechatCallbackapiTest {
- public function valid() {
- $echoStr = $_GET["echostr"];
- if ($this->checkSignature()) {
- echo $echoStr;
- exit;
- }
- }
- public function responseMsg() // 执行接收器方法
- {
- $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];
- if (!empty($postStr)) {
- $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
- $RX_TYPE = trim($postObj->MsgType);
- switch ($RX_TYPE) {
- case "event":
- $result = $this->receiveEvent($postObj);
- breadk;
- }
- echo $result;
- } else {
- echo "";
- exit;
- }
- }
- private function receiveEvent($object) {
- $content = "";
- switch ($postObj->Event) {
- case "subscribe":
- $content = "欢迎关注网志博客"; // 这里是向关注者发送的提示信息
- break;
- case "unsubscribe":
- $content = "";
- break;
- }
- $result = $this->transmitText($object, $content);
- return $result;
- }
- private function transmitText($object, $content) {
- $textTpl = "
- %s
- 0
- ";
- $result = sprintf($textTpl, $object->FromUserName, $object->$ToUserName, time() , $content);
- return $result;
- }
- 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;
- }
- }
- }
- ?>
代码相关参数说明:
参数 描述
ToUserName 开发者微信号
FromUserName 发送方帐号 (一个 OpenID)
CreateTime 消息创建时间 (整型)
MsgType 消息类型, event
Event 事件类型, subscribe(订阅)unsubscribe(取消订阅)
来源: https://www.php1.cn/detail/php-4f0ef204f3.html