How to read messages from public channel PHP

For php language.
Could someone please help me understand how to use and what need to use to get all messages from public channels?

How to use JSON.stringify in php (Telegram.WebApp.initDataUnsafe)

I wanted to use this data in php but I didn’t succeed
While using it in javascript is like this

Callback_query: Clicking the button does not respond and does not receive any information

怎么样搞才能，点击按钮有反应，上网查了好多没有一个能用的