Conditional If based on day/time

[gensoup]

Newbe here; I want to create a small php file that will load one file if the date/time is between two date/times, and another file otherwise. Essentially I need for the first file to be available only for a period of hours. Is this doable? Thanks.

[PhPHelper]

yeah that can be done with php but php won't know what the actual time is inless your calling it from a server and in that case time zones will come into play.

If a user from the uk gets a file another user from say america might get a different file since on a different time zone. You could just the users local time from their computer you would need javascript to do that as php is server side and javascript is client side.