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48 lines
871 B
PHP
48 lines
871 B
PHP
<?php
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/**
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*
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* @package phpBB3
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* @copyright (c) 2013 phpBB Group
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* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
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*
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*/
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namespace phpbb;
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/**
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* A class with various functions that are related to paths, files and the filesystem
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* @package phpBB3
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*/
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class filesystem
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{
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/**
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* Eliminates useless . and .. components from specified path.
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*
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* @param string $path Path to clean
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* @return string Cleaned path
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*/
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public function clean_path($path)
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{
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$exploded = explode('/', $path);
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$filtered = array();
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foreach ($exploded as $part)
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{
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if ($part === '.' && !empty($filtered))
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{
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continue;
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}
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if ($part === '..' && !empty($filtered) && $filtered[sizeof($filtered) - 1] !== '..')
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{
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array_pop($filtered);
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}
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else
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{
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$filtered[] = $part;
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}
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}
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$path = implode('/', $filtered);
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return $path;
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}
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}
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