public function toPhpFileCache($sKey, $mContents)
    {
        //only simple arrays are supported
        if (is_array($mContents) && ($sCachePath = $this->getCacheFilePath($sKey, false, 'php'))) {
            // setting meta
            $this->setCacheMeta($sKey, ["serialize" => false, "cachepath" => $sCachePath]);

            // caching..
            $this->toFileCache($sKey, $mContents);
        }
    }