Can we generate a php page in background?

First of all, I want to create a futuristic racing game on a website. It's build inside a framework (laravel).

I want my users to register for a race that will begin soon after. So here is the big deal, I want to have access to the race in a page at any time of the race. The page will simulate the race and give live results on whats going to all the users.

The problem is that I don't know where to begin with and the most important point... is it possible to generate a background page that run code by itself and can be accessible at any time?

Thank you for answering/helping me :)

via Chebli Mohamed