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<?php
/**
*
* @package phpBB3
* @copyright (c) 2013 phpBB Group
* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
*
*/
namespace phpbb;
/**
* @ignore
*/
if (!defined('IN_PHPBB'))
{
exit;
}
/**
* A class with various functions that are related to paths, files and the filesystem
* @package phpBB3
*/
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] !== '..')
{
array_pop($filtered);
}
else
{
$filtered[] = $part;
}
}
$path = implode('/', $filtered);
return $path;
}
}
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