discuz-调用楼主新帖数据代码出现问题，求指教（php）

<code><!--{eval $threads = DB::fetch_all("SELECT tid FROM ".DB::('forum_thread')." WHERE authorid = ".$postlist['authorid']." AND displayorder >=0 ORDER BY `dateline` DESC LIMIT 0, 5");}--><!--{loop $threads $thread}--><li><a href="forum.php?mod=viewthread&tid='.%24thread%5Btid%5D.'" target="_blank">'.$thread[subject].'</a></li>
<!--{/loop}--></code>

<code><!--{eval $threads = C::t('forum_thread')->fetch_all_by_authorid_displayorder(array_keys($tids), $displayorder, $dglue, $postlist[authorid];}--><!--{loop $threads $thread}--><li><a href="forum.php?mod=viewthread&tid='.%24thread%5Btid%5D.'" target="_blank">'.$thread[subject].'</a></li>
<!--{/loop}--></code>