Gumdrop\FileHandler::listFiles PHP Метод

    private function listFiles($filter_callback, $location = '')
    {
        if ($location == '') {
            $location = $this->app->getSourceLocation();
        }
        $files = array();
        $items = glob($location . '/*');
        if (is_array($items) && count($items) > 0) {
            foreach ($items as $item) {
                $relative_path = ltrim(str_replace(realpath($location), '', realpath($item)), DIRECTORY_SEPARATOR);
                if (strpos($relative_path, '_') !== 0) {
                    if (is_dir($item)) {
                        $files = array_merge($files, $this->listFiles($filter_callback, $item));
                    } else {
                        $filter_callback_result = $filter_callback($item);
                        if ($filter_callback_result !== false && !$this->isBlacklisted($item)) {
                            $files[] = $filter_callback_result;
                        }
                    }
                }
            }
        }
        return $files;
    }