It's simply called Validation, and it is a very simple and straightforward PHP 5.3 based validation library. The goal for them is to make validation easy and painless, using clever constructs like chaining and enabling developers to create reuseable components.

He shows a sample of how it all works by creating a validator that checks to be sure a given value is numeric. He also shows how you can chain the validation methods to create more complicated rules and even check for a set of value types (ex. numbers 1-10 or the string "NO"). You can find the code for Validate on their github repository.

Women's contributions often go unacknowledged, their innovations seldom mentioned, their faces rarely recognized. We want you to tell the world about these unsung heroines. [...] If women need female role models, let's come together to highlight the women in technology that we look up to. Let's create new role models and make sure that whenever the question "Who are the leading women in tech?" is asked, that we all have a list of candidates on the tips of our tongues.

Members of the PHP community have already started making their blog posts (and tweets) about the day - here's a list:

• PHPWomen - the Ada Lovelace Pledge
• Zend Developer Zone - Finding Ada in the PHP Community
• Chris Hartjes - Ada Lovelace Day - Celebrating Women In Technology
• Lorna Mitchell - Ada Lovelace Day: Kathy Sierra
• Rob Allen - In honour of Ada Lovelace
• Derick Rethans - Finding Ada
• Lukas Smith - Finding Ada
• Elizabeth Naramore - For Ada Lovelace Day, My Ode to uberChick
• BinaryKitten - Ada Lovelace day 2009 - @LornaJane #ALD09
• Elizabeth Smith - Ada Lovelace Day 2009
• Stefan Koopmanschap - Ada Lovelace Day - Women in PHP