public function modify()
    {
        $updLastModStm = $this->connection->prepare("UPDATE Page SET last_modified=FROM_UNIXTIME(?) WHERE page_id=?");
        $updLastModStm->bindParam(1, $this->lastModified);
        $updLastModStm->bindParam(2, $this->page_id);
        $this->lastModified = time();
        $updLastModStm->execute();
        return $this->lastModified;

    }