system/helpers/xml_helper.php

<?php
/**
 * CodeIgniter
 *
 * An open source application development framework for PHP 5.2.4 or newer
 *
 * NOTICE OF LICENSE
 *
 * Licensed under the Open Software License version 3.0
 *
 * This source file is subject to the Open Software License (OSL 3.0) that is
 * bundled with this package in the files license.txt / license.rst.  It is
 * also available through the world wide web at this URL:
 * http://opensource.org/licenses/OSL-3.0
 * If you did not receive a copy of the license and are unable to obtain it
 * through the world wide web, please send an email to
 * licensing@ellislab.com so we can send you a copy immediately.
 *
 * @package		CodeIgniter
 * @author		EllisLab Dev Team
 * @copyright	Copyright (c) 2008 - 2014, EllisLab, Inc. (http://ellislab.com/)
 * @license		http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
 * @link		http://codeigniter.com
 * @since		Version 1.0
 * @filesource
 */
defined('BASEPATH') OR exit('No direct script access allowed');

/**
 * CodeIgniter XML Helpers
 *
 * @package		CodeIgniter
 * @subpackage	Helpers
 * @category	Helpers
 * @author		EllisLab Dev Team
 * @link		http://codeigniter.com/user_guide/helpers/xml_helper.html
 */

// ------------------------------------------------------------------------

if ( ! function_exists('xml_convert'))
{
	/**
	 * Convert Reserved XML characters to Entities
	 *
	 * @param	string
	 * @param	bool
	 * @return	string
	 */
	function xml_convert($str, $protect_all = FALSE)
	{
		$temp = '__TEMP_AMPERSANDS__';

		// Replace entities to temporary markers so that
		// ampersands won't get messed up
		$str = preg_replace('/&#(\d+);/', $temp.'\\1;', $str);

		if ($protect_all === TRUE)
		{
			$str = preg_replace('/&(\w+);/', $temp.'\\1;', $str);
		}

		$str = str_replace(
			array('&', '<', '>', '"', "'", '-'),
			array('&amp;', '&lt;', '&gt;', '&quot;', '&apos;', '&#45;'),
			$str
		);

		// Decode the temp markers back to entities
		$str = preg_replace('/'.$temp.'(\d+);/', '&#\\1;', $str);

		if ($protect_all === TRUE)
		{
			return preg_replace('/'.$temp.'(\w+);/', '&\\1;', $str);
		}

		return $str;
	}
}

/* End of file xml_helper.php */
/* Location: ./system/helpers/xml_helper.php */