DevShed finishes up their series looking at making a search engine with the Yahoo! web services in PHP5 in this last look at using the functionality they've created so far to make a more improved search.
This last installment of the series will be entirely focused on demonstrating how Inheritance can be used in a helpful way to build a set of child classes that will come in handy for consuming a specific Yahoo! Search Service.
They show how to use their current image search functionality and, with a few modifications, make a base class that can be used to support ech of the other search types (web, image, video) with common functionality and settings.