khosb/application/classes/valid.php

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

/**
 * Array and variable validation.
 *
 * @package    OSB/Modifications
 * @category   Classes
 * @author     Deon George
 * @copyright  (c) 2010 Deon George
 * @license    http://dev.leenooks.net/license.html
 */
class Valid extends Kohana_Valid {
	/**
	 * Checks if a field matches the value of another field, if it is set.
	 * Field is ignored if it is blank.
	 *
	 * @param   array    array of values
	 * @param   string   field name
	 * @param   string   field name to match
	 * @return  boolean
	 */
	public static function matches_ifset($array, $field, $match)
	{   
		return isset($array[$match]) ? ($array[$field] === $array[$match]) : TRUE;
	}
}
?>