Adapter/File.php
protected function getRaw($Key)
    {
        $CacheFile = $this->getCacheFile($Key);
        if (!file_exists($CacheFile)) {
            return false;
        }

        return unserialize(file_get_contents($CacheFile));
    }
protected function getRaw($Key)
    {
        $CacheFile = $this->getCacheFile($Key);
        if (!file_exists($CacheFile)) {
            return false;
        }

        return unserialize(file_get_contents($CacheFile));
    }
Read Value From File
@param string $Key