Actually, you should research about the story why php was created... it was primarily envisioned as a templating language and the creator wanted people to use c/c++ for business logic etc, however people didn't do that because it was easier with php.

There is absolutely no reason why a website should be build with c, sry...

Edit: link to rasmus lerdorf on 25 years php: https://m.youtube.com/watch?v=wCZ5TJCBWMg