How to Implement an API in PHP Learning from a PHP CRUD REST API Example that Uses the MVC Design Pattern
Here is a nice article to learn about building an API with a PHP MVC framework: https://phpclasses.org/blog/package/13200/post/1-How-to-Implement-an-API-in-PHP-Learning-from-a-PHP-CRUD-REST-API-Example-that-Uses-the-MVC-Design-Pattern--.html