/** * Return an array of stored cache ids which match given tags * * In case of multiple tags, a logical AND is made between tags * * @param array $tags array of tags * @return array array of matching cache ids (string) */ public function getIdsMatchingTags($tags = array()) { if ($tags) { return (array) $this->_redis->sInter($this->_preprocessTagIds($tags)); } return array(); }