Are there any videos or cases on separate front-end and back-end development of thinkphp? ?

Question

Collecting information on the Internet Since I learned PHP by myself, I have not been able to contact the front-end and back-end separation development. I don’t know how to start. I kindly ask the experts to give me some advice. If there is a teaching video on thinkphp’s front-end and front-end separation, I would be really grateful.

At present, the information I have searched for is relatively one-sided. I have not encountered any more detailed articles or cases that talk about PHP front-end and back-end development.