I\'m beginning work on adding SAML SSO support to a project and am looking for any helpful resources specifically geared towards PHP. I understand the basic concepts and hav
I think that SimpleSAMLPHP is the way to go to make your application act as a full-fledged SAML 2.0 Service Provider. It's indeed a complete stack, but you can narrow down the functionalities to the bare minimum.
From my experience, configuration is a lot simpler than with Shibboleth. This step is simplified with the configuration website that ships with the distribution package.
The impact on each PHP page is relatively small: http://simplesamlphp.org/docs/1.8/simplesamlphp-sp#section_6
This is the solution we opted for on our Zend environment.