$posledni = mysql_query ("SELECT phpbb_posts.`topic_id`, phpbb_posts.`forum_id`, phpbb_posts.`post_text`, phpbb_topics.`topic_title` FROM `phpbb_posts` LEFT JOIN `phpbb_topics` ON phpbb_posts.`topic_id`=phpbb_topics.`topic_id` GROUP BY phpbb_posts.`topic_id` ORDER BY `post_id` DESC LIMIT 0,5");