Nette\Caching\Storages\FileStorage::readData PHP Method

    protected function readData($meta)
    {
        $data = stream_get_contents($meta[self::HANDLE]);
        flock($meta[self::HANDLE], LOCK_UN);
        fclose($meta[self::HANDLE]);
        if (empty($meta[self::META_SERIALIZED])) {
            return $data;
        } else {
            return unserialize($data);
        }
    }