How to write imageboard

Hello,
I found out that kusaba x is pretty old shit. What's this whole think about generating html files? Can't it be done simply by sql queries every time and do it with some ajax? How would you write it?

Thanks dudes but really, i know PHP and MySql and all those things like windows and ms paint.

I already did couple of things but I just asked you if making it normal way is good choice. Thanks for this big  discussion ;))