An PHP 5 library for easy openid authentication. The stable version works only as a consumer, but there's an alpha version of a provider class avaiable in the git repository.
Since the OpenID protocol was obsoleted by the OpenID Foundation, this library is obsolete as well, and as such, is not mantained anymore.
Features (of the consumer class):
The code is hosted on gitorious: http://gitorious.org/lightopenid The stable version can be downloaded here, but the newest one is available only from gitorious.
If you have any questions/problems regarding the library, send me a message.
If you look for an user interface (identity selector) to use with LightOpenID, see http://code.google.com/p/openid-selector/ .