elFinder\elFinder::open PHP Method

    protected function open($args)
    {
        $target = $args['target'];
        $init = !empty($args['init']);
        $tree = !empty($args['tree']);
        $volume = $this->volume($target);
        $cwd = $volume ? $volume->dir($target, true) : false;
        $hash = $init ? 'default folder' : '#' . $target;
        // on init request we can get invalid dir hash -
        // dir which can not be opened now, but remembered by client,
        // so open default dir
        if ((!$cwd || !$cwd['read']) && $init) {
            $volume = $this->default;
            $cwd = $volume->dir($volume->defaultPath(), true);
        }
        if (!$cwd) {
            return array('error' => $this->error(self::ERROR_OPEN, $hash, self::ERROR_DIR_NOT_FOUND));
        }
        if (!$cwd['read']) {
            return array('error' => $this->error(self::ERROR_OPEN, $hash, self::ERROR_PERM_DENIED));
        }
        $files = array();
        // get folders trees
        if ($args['tree']) {
            foreach ($this->volumes as $id => $v) {
                if (($tree = $v->tree('', 0, $cwd['hash'])) != false) {
                    $files = array_merge($files, $tree);
                }
            }
        }
        // get current working directory files list and add to $files if not exists in it
        if (($ls = $volume->scandir($cwd['hash'])) === false) {
            return array('error' => $this->error(self::ERROR_OPEN, $cwd['name'], $volume->error()));
        }
        foreach ($ls as $file) {
            if (!in_array($file, $files)) {
                $files[] = $file;
            }
        }
        $result = array('cwd' => $cwd, 'options' => $volume->options($cwd['hash']), 'files' => $files);
        if (!empty($args['init'])) {
            $result['api'] = $this->version;
            $result['uplMaxSize'] = ini_get('upload_max_filesize');
            $result['netDrivers'] = array_keys(self::$netDrivers);
        }
        return $result;
    }