<?php
/**
* CodeIgniter
*
* An open source application development framework for PHP
*
* This content is released under the MIT License (MIT)
*
* Copyright (c) 2014 - 2015, British Columbia Institute of Technology
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* @package CodeIgniter
* @author EllisLab Dev Team
* @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (http://ellislab.com/)
* @copyright Copyright (c) 2014 - 2015, British Columbia Institute of Technology (http://bcit.ca/)
* @license http://opensource.org/licenses/MIT MIT License
* @link http://codeigniter.com
* @since Version 1.0.0
* @filesource
*/
defined('BASEPATH') OR exit('No direct script access allowed');

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

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

if ( ! function_exists('set_realpath'))
{
/**
* Set Realpath
*
* @param string
* @param bool checks to see if the path exists
* @return string
*/
function set_realpath($path, $check_existance = FALSE)
{
// Security check to make sure the path is NOT a URL. No remote file inclusion!
if (preg_match('#^(http:\/\/|https:\/\/|www\.|ftp)#i', $path) OR filter_var($path, FILTER_VALIDATE_IP) === $path )
{
show_error('The path you submitted must be a local server path, not a URL');
}

// Resolve the path
if (realpath($path) !== FALSE)
{
$path = realpath($path);
}
elseif ($check_existance && ! is_dir($path) && ! is_file($path))
{
show_error('Not a valid path: '.$path);
}

// Add a trailing slash, if this is a directory
return is_dir($path) ? rtrim($path, DIRECTORY_SEPARATOR).DIRECTORY_SEPARATOR : $path;
}
}