How to make php work with webpack dev server?

Question

PHP

Hello. I describe the essence of the issue. I did a front-end for a small project (it's a test, purely for study). The tools used are "webpack, webpack-dev-server, ospanel ". I start webpack-dev-server, ospanel. In JavaScript, I make ajax requests to the php file. He reads it and returns me the answer, but as text and in it all php as plain text. Those. it turns out ospanel does not work. Explain, please, why so?