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✏️ Editing: renderfield.php

<?php
/**
 * @package     Joomla.Site
 * @subpackage  Layout
 *
 * @copyright   Copyright (C) 2005 - 2019 Open Source Matters, Inc. All rights reserved.
 * @license     GNU General Public License version 2 or later; see LICENSE.txt
 */

defined('JPATH_BASE') or die;

extract($displayData);

/**
 * Layout variables
 * ---------------------
 *    $options         : (array)  Optional parameters
 *    $label           : (string) The html code for the label (not required if $options['hiddenLabel'] is true)
 *    $input           : (string) The input field html code
 */

if (!empty($options['showonEnabled']))
{
	JHtml::_('jquery.framework');
	JHtml::_('script', 'jui/cms.js', array('version' => 'auto', 'relative' => true));
}

$class = empty($options['class']) ? '' : ' ' . $options['class'];
$rel   = empty($options['rel']) ? '' : ' ' . $options['rel'];

/**
 * @TODO:
 *
 * As mentioned in #8473 (https://github.com/joomla/joomla-cms/pull/8473), ...
 * as long as we cannot access the field properties properly, this seems to
 * be the way to go for now.
 *
 * On a side note: Parsing html is seldom a good idea.
 * https://stackoverflow.com/questions/1732348/regex-match-open-tags-except-xhtml-self-contained-tags/1732454#1732454
 */
preg_match('/class=\"([^\"]+)\"/i', $input, $match);

$required     = (strpos($input, 'aria-required="true"') !== false || (!empty($match[1]) && strpos($match[1], 'required') !== false));
$typeOfSpacer = (strpos($label, 'spacer-lbl') !== false);

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