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<?php
/**
* @package Joomla.Platform
* @subpackage Form
* @copyright Copyright (C) 2005 - 2015 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE.txt
*/
defined('JPATH_PLATFORM') or die;
use Joomla\Registry\Registry;
/**
* Form Rule class for the Joomla Platform.
* Requires the value entered be one of the options in a field of type="list"
*
* @since 11.1
*/
class JFormRuleOptions extends JFormRule
{
/**
* Method to test the value.
*
* @param SimpleXMLElement $element The SimpleXMLElement object representing the <field /> tag for the form field object.
* @param mixed $value The form field value to validate.
* @param string $group The field name group control value. This acts as as an array container for the field.
* For example if the field has name="foo" and the group value is set to "bar" then the
* full field name would end up being "bar[foo]".
* @param Registry $input An optional Registry object with the entire data set to validate against the entire form.
* @param JForm $form The form object for which the field is being tested.
*
* @return boolean True if the value is valid, false otherwise.
*
* @since 11.1
*/
public function test(SimpleXMLElement $element, $value, $group = null, Registry $input = null, JForm $form = null)
{
// Make an array of all available option values.
$options = array();
foreach ($element->option as $opt)
{
$options[] = $opt->attributes()->value;
}
// There may be multiple values in the form of an array (if the element is checkboxes, for example).
if (is_array($value))
{
// If all values are in the $options array, $diff will be empty and the options valid.
$diff = array_diff($value, $options);
return empty($diff);
}
else
{
// In this case value must be a string
return in_array((string) $value, $options);
}
}
}