


PHP WeChat public platform development subscription event processing_PHP tutorial
[PHP WeChat public platform development series]
01. Configure WeChat interface
02. Public platform sample code analysis
03. Subscription event (subscribe) processing
URL of this article: http://www.phpchina.com/archives/view-43367-1.html
This series is contributed by PHPChina's specially invited author @David_Tang. Please indicate the author's information and the address of this article when reprinting.
1. Introduction
When a new user follows the WeChat public platform, a subscription event will be generated, namely subscribe event. There is no corresponding reply to this event in the default code.
After new users pay attention to the public platform, they may want to know what functions the platform provides and how to use the platform. In layman's terms, it is the "instruction manual" of the platform.
This article will describe in detail the processing of the subscribe event and reply to the corresponding information to improve interactivity.
2. Idea analysis
WeChat currently provides five message types, namely:
- Text message (text);
- Picture message (image);
- Geolocation message (location);
- Link message (link);
- Event push (event);
After receiving a message, you first need to make a judgment on the message type, and then process different types of messages. In event push, event types are divided into three types: subscribe (subscription), unsubscribe (cancel subscription), and CLICK (custom menu click event). One more judgment is required; after it is judged to be a subscribe event, the event will be determined according to the settings. Welcome message, reply to the user.
3. Determine the message type

$postObj = simplexml_load_string($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; }

Description:
$RX_TYPE = trim($postObj->MsgType); Get the message type;
case "text":
$resultStr = $this->handleText($postObj); Use the handleText() function to process text messages;
case "event":
$resultStr = $this->handleEvent($postObj); Use the handleEvent() function to handle event push;
4. Determine the event type

switch ($object->Event) { case "subscribe": $contentStr = "感谢您关注【卓锦苏州】"."\n"."微信号:zhuojinsz"."\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; }

Description:
If it is a subscribe event, set the reply content as "Thank you for paying attention to [Zhuojin Suzhou]...";
>5. Complete code

<?php /** * wechat php test */ //define your token define("TOKEN", "zhuojin"); $wechatObj = new wechatCallbackapiTest(); $wechatObj->responseMsg(); //$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); $RX_TYPE = trim($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【卓锦苏州】"."\n"."微信号:zhuojinsz"."\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; } } } ?>


Load balancing affects session management, but can be resolved with session replication, session stickiness, and centralized session storage. 1. Session Replication Copy session data between servers. 2. Session stickiness directs user requests to the same server. 3. Centralized session storage uses independent servers such as Redis to store session data to ensure data sharing.

Sessionlockingisatechniqueusedtoensureauser'ssessionremainsexclusivetooneuseratatime.Itiscrucialforpreventingdatacorruptionandsecuritybreachesinmulti-userapplications.Sessionlockingisimplementedusingserver-sidelockingmechanisms,suchasReentrantLockinJ

Alternatives to PHP sessions include Cookies, Token-based Authentication, Database-based Sessions, and Redis/Memcached. 1.Cookies manage sessions by storing data on the client, which is simple but low in security. 2.Token-based Authentication uses tokens to verify users, which is highly secure but requires additional logic. 3.Database-basedSessions stores data in the database, which has good scalability but may affect performance. 4. Redis/Memcached uses distributed cache to improve performance and scalability, but requires additional matching

Sessionhijacking refers to an attacker impersonating a user by obtaining the user's sessionID. Prevention methods include: 1) encrypting communication using HTTPS; 2) verifying the source of the sessionID; 3) using a secure sessionID generation algorithm; 4) regularly updating the sessionID.

The article discusses PHP, detailing its full form, main uses in web development, comparison with Python and Java, and its ease of learning for beginners.

PHP handles form data using $\_POST and $\_GET superglobals, with security ensured through validation, sanitization, and secure database interactions.

The article compares PHP and ASP.NET, focusing on their suitability for large-scale web applications, performance differences, and security features. Both are viable for large projects, but PHP is open-source and platform-independent, while ASP.NET,

PHP's case sensitivity varies: functions are insensitive, while variables and classes are sensitive. Best practices include consistent naming and using case-insensitive functions for comparisons.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Atom editor mac version download
The most popular open source editor

mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

Dreamweaver Mac version
Visual web development tools

SublimeText3 Linux new version
SublimeText3 Linux latest version

Dreamweaver CS6
Visual web development tools
