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<?php
/**
* Joomla! Content Management System
*
* @copyright (C) 2008 Open Source Matters, Inc. <https://www.joomla.org>
* @license GNU General Public License version 2 or later; see LICENSE.txt
*/
namespace Joomla\CMS\HTML\Helpers;
\defined('JPATH_PLATFORM') or die;
use Joomla\CMS\Document\HtmlDocument;
use Joomla\CMS\Factory;
use Joomla\CMS\Session\Session;
use Joomla\Utilities\ArrayHelper;
/**
* Utility class for form elements
*
* @since 1.5
*/
abstract class Form
{
/**
* Array containing information for loaded files.
*
* @var array
*
* @since 3.8.0
*/
protected static $loaded = array();
/**
* Displays a hidden token field to reduce the risk of CSRF exploits
*
* Use in conjunction with Session::checkToken()
*
* @param array $attribs Input element attributes.
*
* @return string A hidden input field with a token
*
* @see Session::checkToken()
* @since 1.5
*/
public static function token(array $attribs = array())
{
$attributes = '';
if ($attribs !== array())
{
$attributes .= ' ' . ArrayHelper::toString($attribs);
}
return '<input type="hidden" name="' . Session::getFormToken() . '" value="1"' . $attributes . '>';
}
/**
* Add CSRF form token to Joomla script options that developers can get it by Javascript.
*
* @param string $name The script option key name.
*
* @return void
*
* @since 3.8.0
*/
public static function csrf($name = 'csrf.token')
{
if (isset(static::$loaded[__METHOD__][$name]))
{
return;
}
/** @var HtmlDocument $doc */
$doc = Factory::getDocument();
if (!$doc instanceof HtmlDocument || $doc->getType() !== 'html')
{
return;
}
$doc->addScriptOptions($name, Session::getFormToken());
static::$loaded[__METHOD__][$name] = true;
}
}