elFinder\elFinderVolumeLocalFileSystem::_extract PHP Method

    protected function _extract($path, $arc)
    {
        if ($this->quarantine) {
            $dir = $this->quarantine . DIRECTORY_SEPARATOR . str_replace(' ', '_', microtime()) . basename($path);
            $archive = $dir . DIRECTORY_SEPARATOR . basename($path);
            if (!@mkdir($dir)) {
                return false;
            }
            chmod($dir, 0777);
            // copy in quarantine
            if (!copy($path, $archive)) {
                return false;
            }
            // extract in quarantine
            $this->_unpack($archive, $arc);
            unlink($archive);
            // get files list
            $ls = array();
            foreach (scandir($dir) as $i => $name) {
                if ($name != '.' && $name != '..') {
                    $ls[] = $name;
                }
            }
            // no files - extract error ?
            if (empty($ls)) {
                return false;
            }
            $this->archiveSize = 0;
            // find symlinks
            $symlinks = $this->_findSymlinks($dir);
            // remove arc copy
            $this->remove($dir);
            if ($symlinks) {
                return $this->setError(elFinder::ERROR_ARC_SYMLINKS);
            }
            // check max files size
            if ($this->options['maxArcFilesSize'] > 0 && $this->options['maxArcFilesSize'] < $this->archiveSize) {
                return $this->setError(elFinder::ERROR_ARC_MAXSIZE);
            }
            // archive contains one item - extract in archive dir
            if (count($ls) == 1) {
                $this->_unpack($path, $arc);
                $result = dirname($path) . DIRECTORY_SEPARATOR . $ls[0];
            } else {
                // for several files - create new directory
                // create unique name for directory
                $name = basename($path);
                if (preg_match('/\\.((tar\\.(gz|bz|bz2|z|lzo))|cpio\\.gz|ps\\.gz|xcf\\.(gz|bz2)|[a-z0-9]{1,4})$/i', $name, $m)) {
                    $name = substr($name, 0, strlen($name) - strlen($m[0]));
                }
                $test = dirname($path) . DIRECTORY_SEPARATOR . $name;
                if (file_exists($test) || is_link($test)) {
                    $name = $this->uniqueName(dirname($path), $name, '-', false);
                }
                $result = dirname($path) . DIRECTORY_SEPARATOR . $name;
                $archive = $result . DIRECTORY_SEPARATOR . basename($path);
                if (!$this->_mkdir(dirname($path), $name) || !copy($path, $archive)) {
                    return false;
                }
                $this->_unpack($archive, $arc);
                @unlink($archive);
            }
            return file_exists($result) ? $result : false;
        }
    }