how to upload php website on github.

Question

I have created a php website and try to upload on github but it not working.

Answer 1

As a repo? Or are you trying to deploy it?
If you're trying to deploy a site on Github, note that you can only use static pages. Github doesn't support any backend deployment with your site. You could host the pages there and then link to a server somewhere else that handles the PHP, but if that's the case then you'd probably be better off just hosting the whole thing somewhere else.
If you're trying to upload a repo, please check their tutorials for info.