Object relational mapping - Relations - Inheritance - One table many classes.php

<?php
class Entity extends Doctrine_Record {
    public function setTableDefinition() {
        $this->hasColumn('name','string',30);
        $this->hasColumn('username','string',20);
        $this->hasColumn('password','string',16);
        $this->hasColumn('created','integer',11);                                     	
    }
}

class User extends Entity { }

class Group extends Entity { }
?>