织梦dedecms判断文章是否为推荐文章

{dede:arclist row='10' typeid='typeid' titlelen='36' runphp='yes'} {dede:loop value=$dls}     {if preg_match('/c/', $fields[flag])}         <strong>推荐文章: </strong>     {/if}     <a href="[field:arcurl]" title="[field:title]">[field:title]</a> {/dede:loop} {/dede:arclist}