public function gc(int $maxlifetime) : bool
    {
        static $stmt;
        if (!isset($stmt)) {
            $stmt = $this->pdo->prepare(
                "DELETE FROM cesession_session WHERE dateactive < ?"
            );
        }
        $stmt->execute([date('Y-m-d H:i:s', strtotime("-$maxlifetime second"))]);
        return ($affectedRows = $stmt->rowCount()) && $affectedRows;
    }