Gdn_Cache::getRevision PHP Method

    public function getRevision($ForcePrefix = null, $Force = false)
    {
        static $CacheRevision = false;
        if ($CacheRevision === false || $Force) {
            $ConfigPrefix = $ForcePrefix;
            if (is_null($ConfigPrefix)) {
                $ConfigPrefix = $this->getPrefix(null, false);
            }
            $CacheRevisionKey = "{$ConfigPrefix}.Revision";
            $CacheRevision = $this->get($CacheRevisionKey, array(Gdn_Cache::FEATURE_NOPREFIX => true));
            if ($CacheRevision === Gdn_Cache::CACHEOP_FAILURE) {
                $CacheRevision = 1;
            }
        }
        return $CacheRevision;
    }