File Source for Back.php

<?php
/* vim: set expandtab tabstop=4 shiftwidth=4: */
// +----------------------------------------------------------------------+
// | PHP version 4.0 |
// +----------------------------------------------------------------------+
// | Copyright (c) 1997-2003 The PHP Group |
// +----------------------------------------------------------------------+
// | This source file is subject to version 2.0 of the PHP license, |
// | that is bundled with this package in the file LICENSE, and is |
// | available at through the world-wide-web at |
// | http://www.php.net/license/2_02.txt. |
// | If you did not receive a copy of the PHP license and are unable to |
// | obtain it through the world-wide-web, please send a note to |
// | license@php.net so we can mail you a copy immediately. |
// +----------------------------------------------------------------------+
// | Author: Alexey Borzov <avb@php.net> |
// +----------------------------------------------------------------------+
//
// $Id: Back.php 6184 2005-09-07 10:08:17Z bmol $
require_once 'HTML/QuickForm/Action.php';
/**
* The action for a 'back' button of wizard-type multipage form.
*
* @author Alexey Borzov <avb@php.net>
* @package HTML_QuickForm_Controller
* @version $Revision: 6184 $
*/
class HTML_QuickForm_Action_Back extends HTML_QuickForm_Action
{
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()) {
$data['valid'][$pageName] = $page->validate();
}
// get the previous page and go to it
// we don't check validation status here, 'jump' handler should
if (null === ($prevName = $page->controller->getPrevName($pageName))) {
return $page->handle('jump');
} else {
$prev =& $page->controller->getPage($prevName);
return $prev->handle('jump');
}
}
}
?>

Source for file Back.php