Tani’s OpenID Authentication 2.0 Library

OpenID Authentication 1.1/2.0 support PHP Library

Support : OpenID 1.x and 2.0 with
Simple Registration Extension 1.0/1.1d5 (SReg)
Provider Authentication Policy Extension 1.0 (PAPE)
Attribute eXchange specification Extension 1.0 (AX)
User Interface Extension 1.0d05 (UI)
OAuth Extension 1.0d (OAuth Hybrid)

== Require ==
GMP extension or pear/Math_BigInteger
cURL extension or pear/HTTP_Request2