The PHP community also has a powerful database integration tool at their disposal: a project known as Doctrine. This open source project not only simplifies the task of mapping database tables to PHP's object-oriented class structure, but also facilitates the management of your data and schemas over the project lifecycle.

Jason Gilmore's article introduces Doctrine and shows you how to begin mapping your database tables to PHP objects. Read the whole article here: http://www.developer.com/db/article.php/3887336/Doctrine-Object-Relational-Mapping-for-Your-PHP-Development.htm