Auth_Yubico is a PHP class for verifying Yubico One-Time-Passwords. It is written as a PEAR module to make it easy to deploy.

Check out the two demo page for this project:

• http://demo.yubico.com/php-yubico/
• http://demo.yubico.com/php-yubico/demo.php
• http://demo.yubico.com/php-yubico/Modhex_Calculator.php

For more information see the documentation: ReadMe