public function getPostsByHour(DateTime $From, DateTime $To) {
        $query = "SELECT HOUR(FROM_UNIXTIME(post_time)) AS hour, count(*) AS count
                    FROM nuke_bbposts 
                    WHERE post_time BETWEEN UNIX_TIMESTAMP(?) AND UNIX_TIMESTAMP(?)
                    GROUP BY HOUR(FROM_UNIXTIME(post_time))";