RequestComments::getLastComment PHP Method

    private function getLastComment($requestId)
    {
        $sth = $this->db->prepare('SELECT * FROM request_comments WHERE request = ? ORDER BY id DESC LIMIT 1');
        $sth->bindParam(1, $requestId, PDO::PARAM_INT);
        $sth->execute();
        return $sth->fetch(PDO::FETCH_ASSOC);
    }