利用array判断列表有图片调图片，没图片留空

{dede:list pagesize='10'}    <dd><a href="[field:arcurl/]">[field:title/]</a></dd>    <dt>        <div class="left">        [field:array runphp='yes']        if(empty(@me['litpic']) || @me['litpic'] =='/images/defaultpic.gif')        @me = "";        else        @me = "<a href='{@me['arcurl']}' target=\"_blank\"><img src='{@me['litpic']}' width='200' height='150'/></a>";        [/field:array]        </div>        <div class="right">[field:infos/]...</div>    </dt>{/dede:list}