Single Logout with SAML 2.0 and PHP

Back in February, Marina Sum and I co-wrote an article on the OpenSSO SAML 2.0 PHP Extension, or Lightbulb, as it was then known. The sequel to that article - Single Logout: A Demo just went live at Sun Developer Network: Marina and I provide an update on Project Lightbulb’s evolution into an OpenSSO Extension as well as a look at circles of trust and single logout in SAML 2.0. As before, we look at a simple example message flow, then delve down into the PHP code to see how it all works. Click here for the article.