This package is based on the libradius of FreeBSD, with some modifications and
extensions.

This PECL provides full support for RADIUS authentication (RFC 2865) and
RADIUS accounting (RFC 2866), works on Unix and on Windows. Its an easy way to
authenticate your users against the user-database of your OS (for example
against Windows Active-Directory via IAS).

WWW: http://pecl.php.net/package/radius/