I need a php lib that can auth using OpenID against sites offering this service, like Google, Yahoo, Wordpress, etc... Anyone used any lib that actuallly works? I've tryied a few but couldn't get any to auth against Google, Yahoo, or Wordpress.
I would highly recommend LightOpenID by Mewp. It comes with a great example and has no unusual dependencies (the only requirement you need to be aware of is that of the CURL PHP extension). It's entirely self-contained, it's only one file, and the code is very readable. There are more tasty details.