IBM developerWorks has just published my article on creating REST applications with the Slim PHP micro-framework.
Slim is one of the new breed of PHP micro-frameworks, inspired by Sinatra. It enables rapid web application development and prototyping without the performance overhead and learning curve of full-fledged frameworks. The article examines Slim in detail, using it to rapidly build and deploy a REST API with support for authentication and multiple request/response formats.
Read the full article here. You can also view slides from my presentation on this topic here.