Anonymous Reader writes "Almost half of eBay's transactions occur through its Webservices
platform. These three tutorials shows you how to create applications
in PHP5 that interact with eBay through Webservices.
Build an eBay search engine
This tutorial shows you how to build a small application that allows
users to execute ad hoc queries against eBay through eBay's SOAP API.
Use the eBay SOAP API and Webservices
This tutorial focuses on integrating an application with eBay's
Webservices, using the authentication and authorization system, and
making API calls.
Develop eBay applications with PHP5 and Webservices
This tutorial will give you a solid understanding of the mechanics of
the interaction between PHP5, eBay Webservices and the eBay XML API."