title: Good PHP ORM Library?
body: <p>Is there a good object-relational-mapping library for PHP? </p>
  
  <p>I know of <a href="http://www.php.net/manual/en/intro.pdo.php" rel="noreferrer">PDO</a>/ADO, but they seem to only provide abstraction of differences between database vendors not an actual mapping between the domain model and the relational model. I'm looking for a PHP library that functions similarly to the way <a href="http://en.wikipedia.org/wiki/Hibernate_%28Java%29" rel="noreferrer">Hibernate</a> does for Java and NHibernate does for .NET.</p>