private static function buildMemcachedMutex($name, &$memcache, $timeout = 3) { if (!getenv("MEMCACHE_HOST")) { return; } $memcache = new \Memcached(); $memcache->addServer(getenv("MEMCACHE_HOST"), 11211); return new MemcachedMutex($name, $memcache, $timeout); }