boolean.php

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<?php
/**
 * @package     Joomla.Platform
 * @subpackage  Form
 *
 * @copyright   Copyright (C) 2005 - 2013 Open Source Matters, Inc. All rights reserved.
 * @license     GNU General Public License version 2 or later; see LICENSE
 */

defined('JPATH_PLATFORM') or die;

/**
 * Form Rule class for the Joomla Platform.
 *
 * @package     Joomla.Platform
 * @subpackage  Form
 * @since       11.1
 */
class JFormRuleBoolean extends JFormRule
{
        /**
         * The regular expression to use in testing a form field value.
         *
         * @var    string
         * @since  11.1
         */
        protected $regex = '^(?:[01]|true|false)$';

        /**
         * The regular expression modifiers to use when testing a form field value.
         *
         * @var    string
         * @since  11.1
         */
        protected $modifiers = 'i';
}