How do I create a ‘next product’, ‘previous product’ in PHP?

We’ve a google search page that lists quite a few products according to certain search criteria accessed.Each product features a ‘details’ hyperlink that leads to a item details page with the product.I would like to ‘remember’ the particular recordset if the user visits the particulars page to ensure that I can provide the individual a ‘previous product’ in addition to ‘next product’ button so they really don’t have to go back to the search results page each and every time they interested in another product inside the search outcomes.

When will i go about it I’m somewhat confused/stuck and could really employ some help/inspiration.

Since Hubpages uses PHP, this may be good enough:

Upcoming and Past Links :
http://codex.hubpages.org/Next_and_Previous_Links

Ron.