When developing WeChat public accounts, we often need to interact with WeChat servers for messages, including receiving messages from users and replying to messages. In order to ensure security and correctness, we need to verify the message and respond with the corresponding message interface. This article will introduce an example of how to use PHP to implement WeChat public platform message interface verification and message interface response.
First, we need to understand the verification rules of the WeChat public platform message interface. When we configure the message interface in the background of the official account, we need to fill in a Token. This Token will be used to verify the received messages. The WeChat server will send a GET request to our server, which contains four parameters: signature, timestamp, nonce and echostr. Our server needs to verify based on these parameters and return echostr to the WeChat server to complete the verification.
Next, we use PHP code to implement the functions of message interface verification and message interface response. First, we create a file called "wechat.php" and add the following code:
<?php
// 配置Token
$token = "your_token";
// 验证消息的签名
function checkSign