Example code from Pheasant

pheasant.php

<?php


/**
 * A domain object using Pheasant for persistence
 */
class User extends DomainObject
{
	public function __construct($firstname, $lastname)
	{
		$this->firstname = $firstname;
		$this->lastname = $lastname;
	}

	private function attributes()
	{
		return array(
			Attribute::serial('userid', array('primary'=>true)),
			Attribute::string('firstname', 255),
			Attribute::string('lastname', 255, array('null'=>true, 'default'=>'frank')),
		);
	}

	private function relationships()
	{
		return array(
			'Group' => Relationship::hasOne('Group','groupid'),
		);
	}
}