SitePoint.com has a new article today from Harry Fuecks covering the use of PHP applications to interact with Excel (using a Worksheet Server).

From time to time, someone does something with PHP that is truly unique -- something that goes far beyond the norm of PHP applications listed at Hotscripts and leaves you truly impressed by the capabilities of this language. One prime example is Jedox's Worksheet Server, a truly unique combination of Microsoft Excel and PHP that enables users to build "online spreadsheets".

He introduces the Worksheet server, shows you a bit of how PHP interacts with it, and even gives some sample code to get you started along the right path. Unfortunately, the Worksheet Server is a commercial product, and looking at the pricing it's clear this package isn't meant for the home user