织梦有缩略图显示,没有显示随机指定图片的办法

[field:array runphp='yes']@me = (strpos(@me['litpic'],'defaultpic') ? "<a class='focus' href='{@me['arcurl']}'><img src='/images/default/".mt_rand(1,30).".jpg' class='thumb' /></a>" : "<a class='focus' href='{@me['arcurl']}'><img src='{@me['litpic']}'class='thumb'/></a>");[/field:array]

{dede:field name='array' runphp='yes'}@me = (strpos(@me['litpic'],'defaultpic') ? "<img src='/images/default/".mt_rand(1,30).".jpg' alt='{@me['title']}' />" : "<img src='{@me['litpic']}' alt='{@me['title']}' />");{/dede:field}