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<?php
/**
 * @package     Joomla.Plugin
 * @subpackage  Fields.URL
 *
 * @copyright   Copyright (C) 2005 - 2020 Open Source Matters, Inc. All rights reserved.
 * @license     GNU General Public License version 2 or later; see LICENSE.txt
 */

defined('_JEXEC') or die;

JLoader::import('components.com_fields.libraries.fieldsplugin', JPATH_ADMINISTRATOR);

/**
 * Fields URL Plugin
 *
 * @since  3.7.0
 */
class PlgFieldsUrl extends FieldsPlugin
{
	/**
	 * Transforms the field into a DOM XML element and appends it as a child on the given parent.
	 *
	 * @param   stdClass    $field   The field.
	 * @param   DOMElement  $parent  The field node parent.
	 * @param   JForm       $form    The form.
	 *
	 * @return  DOMElement
	 *
	 * @since   3.7.0
	 */
	public function onCustomFieldsPrepareDom($field, DOMElement $parent, JForm $form)
	{
		$fieldNode = parent::onCustomFieldsPrepareDom($field, $parent, $form);

if (!$fieldNode)
		{
			return $fieldNode;
		}

$fieldNode->setAttribute('validate', 'url');

if (! $fieldNode->getAttribute('relative'))
		{
			$fieldNode->removeAttribute('relative');
		}

return $fieldNode;
	}
}

/home/lili/public_html/plugins/fields/url/url.php