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<?php
/**
*
* This file is part of the phpBB Forum Software package.
*
* @copyright (c) phpBB Limited <https://www.phpbb.com>
* @license GNU General Public License, version 2 (GPL-2.0)
*
* For full copyright and license information, please see
* the docs/CREDITS.txt file.
*
*/
namespace phpbb;
/**
* A class with various functions that are related to paths, files and the filesystem
*/
class filesystem
{
/**
* Eliminates useless . and .. components from specified path.
*
* @param string $path Path to clean
* @return string Cleaned path
*/
public function clean_path($path)
{
$exploded = explode('/', $path);
$filtered = array();
foreach ($exploded as $part)
{
if ($part === '.' && !empty($filtered))
{
continue;
}
if ($part === '..' && !empty($filtered) && $filtered[sizeof($filtered) - 1] !== '.' && $filtered[sizeof($filtered) - 1] !== '..')
{
array_pop($filtered);
}
else
{
$filtered[] = $part;
}
}
$path = implode('/', $filtered);
return $path;
}
}
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