So I want to make PvP turn-based web game,
I am mostly done with Front-end. (you can find the link below)
& the problem is I don’t how make it multiplayer, I researched & found out that PhP & Ajax could help
Though I don’t know much about both of them.
I just made a php registration and login form, but I really couldn’t find anything that would suit a Browser – turn based multiplayer game.

Can someone guide me where I should start from?

The Page I made just with CSS & a tad bit of JS

You can find the live demo here : http://decorprints.in/Miscrits/
also this is Responsive!

The assests were taken from a facebook game that died, (I am trying bring back something similar to it)
they are just placeholders for now I will change it if this gets big.