Source for file back.php

<?php
/* vim: set number autoindent tabstop=2 shiftwidth=2 softtabstop=2: */
 
/**
* Back action
*
* PHP versions 4 and 5
*
* LICENSE: This source file is subject to version 3.0 of the PHP license
* that is available through the world-wide-web at the following URI:
* http://www.php.net/license/3_0.txt.  If you did not receive a copy of
* the PHP License and are unable to obtain it through the web, please
* send a note to license@php.net so we can mail you a copy immediately.
*
* @category   HTML
* @package    HTML_QuickForm_Wizard
* @author     Fabio Ambrosanio <fabio@ambrosanio.com>
* @license    http://www.php.net/license/3_01.txt  PHP
* @version    @package_version@
*
*  $Id: back.php,v 1.1 2006/12/09 15:05:56 fabamb Exp $
*/
 
require_once 'HTML/QuickForm/Action/Back.php';
 
/**
 * This class implements "back" action that is to save form's data and go to previous page
 *
 */
class HTML_QuickForm_Wizard_back extends HTML_QuickForm_Action_Back
{
    function perform(&$page, $actionName)
    {
        // save the form values and validation status to the session
        $page->isFormBuilt() or $page->buildForm();
        $pageName =  $page->getAttribute('id');
        $data     =& $page->controller->container();
        $data['values'][$pageName] = $page->exportValues();
        if (!$page->controller->isModal()) {
            if (PEAR::isError($valid = $page->validate())) {
                return $valid;
            }
            $data['valid'][$pageName] = $valid;
        }
 
        // gets back page from stack
        $backName = $page->controller->getBackName($pageName);
 
        //
        $prev =& $page->controller->getPage($backName);
        $prev->handle('jump');
    }
}
?>