I am getting your points. AMP is another framework that helps to create the user interface. You can PHP programming with AMP because of PHP files can contain text, HTML, CSS, JavaScript, and PHP code. There are three parts of AMP that you need to understand.
1. AMP HTML
2.AMP JS
3. AMP Cache
How to start work on AMP with PHP?
This is a better way to rank on Google at first priority. You need to understand the basics to advance the skills of AMP with PHP programming.
If you have basic skills for PHP, CSS, HTML, JS then you will be able to install and use AMP on the website with PHP.
Requirements -
1. PHP ,HTML ,CSS and JS skills
2. MYSQL Server
3.AMPGeneratorOne library. This is an open-source framework.
4. Text Editor.
https://amp.dev/
Start learning from basics
https://medium.com/cook-php/how-to-easily-create-a-amp-site-in-9-step-using-php-98e7fcdc93