复制代码
简单描述：
<!--{if $mtag[tag_count]>0}-->

<!--{eval $mtags = DB::fetch_all("SELECT a.tagid, a.tagname, count(b.tagid) as tag_count FROM ".DB::table("common_tag")." a LEFT JOIN ".DB::table("common_tagitem")." b on b.tagid=a.tagid WHERE a.`status` = 0 group by b.tagid ORDER BY a.`tagid` DESC LIMIT 0,100");}-->
<a href=http://www.ym97.com/discuz/"misc.php?mod=tag&id=$mtag[tagid]" target="_blank" class="xi2">$mtag[tagname]{$mtag[tag_count]}</a>
</div>
查询tag的两个表common_tag和common_tagitem，获取tagid，tagname两个字段，并统计tagid个数，分组合计，按tagid倒序排序，取前100条。
<!--{/loop}-->
如果要按标签相关帖子数来排序，ORDER BY `tag_count`。
<!--{loop $mtags $mtag}-->

<!--{/if}-->
<div class="fmtags">