I'm making a php interpreter in rust

Hello everyone, I would like to share with you my new project (it is still in development, in fact I started with it a few weeks ago), it is a PHP interpreter in Rust, I decided to make such a big project because I am the type of person who learns better with projects, and I think I can learn a lot from this (and I have already learned a lot), I would like to know what I can do better or what I am doing well. Here is the repository :D: https://github.com/Davidflogar/phpl