微信公众号订阅事件及文本回复

冷不防 2022-03-30 08:54 292阅读 0赞

代码实现效果：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hhb3l1bnl1bjg4OA_size_16_color_FFFFFF_t_70][]

<?php
    /**
      * wechat php test
      */
    
    //define your token
    define("TOKEN", "mengxianglei");
    $wechatObj = new wechatCallbackapiTest();
    if(!isset($_GET['echostr'])){
    $wechatObj->responseMsg();
    }else{
    $wechatObj->valid();
    }
    //$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 = file_get_contents('php://input');    //全局变量的信息    可以接收
    
            //extract post data
            if (!empty($postStr)){
                    
                    $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
                    $RX_TYPE = trim($postObj->MsgType);
    
                    switch($RX_TYPE)
                    {
                        case "text":
                            $resultStr = $this->handleText($postObj);
                            break;
                        case "event":
                            $resultStr = $this->handleEvent($postObj);
                            break;
                        default:
                            $resultStr = "Unknow msg type: ".$RX_TYPE;
                            break;
                    }
                    echo $resultStr;
            }else {
                echo "";
                exit;
            }
        }
    
        public function handleText($postObj)
        {
            $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...";
            }
        }
    
        public function handleEvent($object)
        {
            $contentStr = "";
            switch ($object->Event)
            {
                case "subscribe":
                    $contentStr = "感谢您关注【1803A班级】"."\n"."微信号：php1803A"."\n"."卓越锦绣，名城苏州，我们为您提供苏州本地生活指南，苏州相关信息查询，做最好的苏州微信平台。"."\n"."目前平台功能如下："."\n"."【1】 查天气，如输入：苏州天气"."\n"."【2】 查公交，如输入：苏州公交178"."\n"."【3】 翻译，如输入：翻译I love you"."\n"."【4】 苏州信息查询，如输入：苏州观前街"."\n"."更多内容，敬请期待...";
                    break;
                default :
                    $contentStr = "Unknow Event: ".$object->Event;
                    break;
            }
            $resultStr = $this->responseText($object, $contentStr);
            return $resultStr;
        }
        
        public function responseText($object, $content, $flag=0)
        {
            $textTpl = "<xml>
                        <ToUserName><![CDATA[%s]]></ToUserName>
                        <FromUserName><![CDATA[%s]]></FromUserName>
                        <CreateTime>%s</CreateTime>
                        <MsgType><![CDATA[text]]></MsgType>
                        <Content><![CDATA[%s]]></Content>
                        <FuncFlag>%d</FuncFlag>
                        </xml>";
            $resultStr = sprintf($textTpl, $object->FromUserName, $object->ToUserName, time(), $content, $flag);
            return $resultStr;
        }
    
        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;
            }
        }
    }
    
    ?>

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hhb3l1bnl1bjg4OA_size_16_color_FFFFFF_t_70]: /images/20220330/e35464c51aa8422a9b297a20bbbdd26d.png