The IBM developerWorks website has a new tutorial posted showing how to create a web service with the combination of PHP and the Eclipse IDE.

Learn how to build Web services in PHP using the PHP Development Tools plug-in in Eclipse Europa. Become familiar with the PDT project, and learn how to create and deploy useful PHP projects, learn about the philosophy behind contract-first development, and understand the basic parts that make up a Web Services Description Language (WSDL) file.

You'll have to register/sign in to get to it. They give an introduction to the PHP Development Tools for Eclipse, creating a WSDL file visually in the IDE and integrating it all to work with your Eclipse front-end.