Free Open Source PHP ORM

What is Doctrine?

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Doctrine is a PHP ORM (object relational mapper) for PHP 5.2.3+ that sits on top of a powerful PHP DBAL (database abstraction layer). One of its key features is the ability to optionally write database queries in an OO (object oriented) SQL-dialect called DQL inspired by Hibernates HQL. This provides developers with a powerful alternative to SQL that maintains a maximum of flexibility without requiring needless code duplication.