I need this code to be done in PHP.

I need it to load a page, then after 5 seconds it will go to a different page (and stay there).

Examples of places this is done is on download pages, when you click download and 5 seconds later it redirects you to the actual file.

I already have the page I want this on, all the text and everything, so all I need is the code to wait a few seconds, then forward to a different page (in the same window).

In Summary:
The page loads, waits a few seconds, and forwards to a different page.

Must be done in PHP.