I am using sfOpenID plugin for Symfony, which doesn\'t support OpenID 2.0. That means, for example, that people using Yahoo! OpenID can\'t login to my site.
There is an
i had ( and i'm still having ) the same problem. Firstly there isn't any php5 openid library that is feature complete. The only one was abandoned for the one shipped with Zend Framework.
So you either write your own ( don't recomend , lot of work ), or use the one from Zend ( that is what i Use).
The problem is that it is heavily embeded into Zend and requires lots of ZF stuff.
Maybe i will publish a plugin similar to taOpenIDsfGuardPlugin but for use withouth sfGuard, because it's often asked for ( and i will need it for my future projects ;))