user_model.php

<?php defined('SYSPATH') or die('No direct script access.');

class User_Model extends ORM {

	protected $ignored_columns = array('birthday_day', 'birthday_month', 'birthday_year');

	public function validate(array & $array, $save = FALSE)
	{
		$array = Validation::factory($array)
			->pre_filter('trim')
			->add_rules('username', 'required', 'chars[a-z_.]')
			->add_rules('password', 'required', 'length[5,127]')
			->add_rules('birthday_day', 'required', 'digit')
			->add_rules('birthday_month', 'required', 'digit')
			->add_rules('birthday_year', 'required', 'digit');
			->add_callbacks('birthday_year', array($this, 'check_birthday'));

		return parent::validate($array, $save);
	}

	public function check_birthday(Validation $array, $field)
	{
		if (isset($array['birthday_day']) AND isset($array['birthday_month']) AND isset($array['birthday_year']))
		{
			// Create the birthday as a UNIX timestamp
			$this->birthday = mktime(0, 0, 0, $array['birthday_month'], $array['birthday_day'], $array['birthday_year']);
		}
	}

} // End User