Example password validation

gistfile1.php

<?php 
class User extends AppModel {
	var $validate = array(
		'first_name' => array('rule' => 'notEmpty', 'message' => 'Please enter a first name.'),
		'last_name' => array('rule' => 'notEmpty', 'message' => 'Please enter a last name.'),
		'phone' => array('rule' => array('phone', null, 'us'), 'allowEmpty' => true, 'message' => 'Please enter a valid phone number.'),
		'email' => array(
			'email' => array('rule' => array('email', true), 'message' => 'Please use a valid email address.'),
			'isUnique' => array('rule' => 'isUnique', 'message' => 'This email address is already being used.')
		),
		'password_confirm' => array(
			'characters' => array('rule' => 'alphaNumeric', 'message' => 'Please enter a valid password.', 'last' => true),
			'confirm' => array('rule' => 'confirmPassword', 'message' => 'These passwords do not match.')
		)
	);
	
	function confirmPassword() {
		# Verify password and confirm match
		return $this->data['User']['password'] == Security::hash($this->data['User']['password_confirm'], null, true);
	}
}