PHP and windowing

In reading through my PHP text, I find no great references to PHP's windowing ability; therefore, I presume it has none. To preserve a screen image, I need to open a pop-up to write the contents of a shopping cart and then close the window. Am I correct in thinking this will be a: PHP -> Javascript (window open) -> PHP to display shopping cart from a data base -> Javascript to close the window -> PHP to the instigating module. Or, does someone know something that is not in the books and that windowing can be accomplished with straight PHP because I don't want to introduce another layer of unnecessary complexity. Thankx ... folks. Bob Sears, Owner WebWyshez