Cache\Adapter\Filesystem\FilesystemCachePool::fetchObjectFromCache PHP Method

    protected function fetchObjectFromCache($key)
    {
        $empty = [false, null, []];
        $file = $this->getFilePath($key);
        if (!$this->filesystem->has($file)) {
            return $empty;
        }
        try {
            $data = unserialize($this->filesystem->read($file));
        } catch (FileNotFoundException $e) {
            return $empty;
        }
        if ($data[0] !== null && time() > $data[0]) {
            foreach ($data[2] as $tag) {
                $this->removeListItem($this->getTagKey($tag), $key);
            }
            $this->forceClear($key);
            return $empty;
        }
        return [true, $data[1], $data[2]];
    }