I dont think what you need is PHP, but i could be mis-understanding your question. To make the page sleep and than revist try a meta refresh.
<META HTTP-EQUIV=Refresh CONTENT="10; URL=test.html">
But if you want to visit a page you have no control over you could try a javascript to create an entry popup to load the page. Here is a page with some scripts to do that but i could get any of the scripts to work but i might have something turned off/on to block that.

-Stephen