帝国cms列表某个字段php判断值为空没有填写就不显示

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$_nowclass=$empire->fetch1("select * from {$dbtbpre}enewsclass where classid='$r[classid]'");
if($r[leixing]==1){$leixing='/skin/images/697d72c337a3443a499aa82a75fa3848.png';}else{$leixing='/skin/images/c3b68b548bb563c5fbe2b10c1622c978.png';}
if($r['appid']!=''){$appid='<a href="[!--titleurl--]" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  target="_blank" class="label on" data-v-0e2f59fc="">版本合集</a>';}else{$appid='';}
$listtemp=' <div class="item" style="background-image:url( '.$leixing.' );" data-v-04823eb6="">
<div class="name" data-v-04823eb6="">
<a href="[!--titleurl--]" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  target="_blank" title="[!--title--] [!--bb--]" class="name-text" data-v-04823eb6="">[!--title--] [!--bb--]</a> <!---->
'.$appid.'
<div title="[!--smalltext--]" class="text" data-v-04823eb6="">
[!--smalltext--]
</div>
<div class="other" data-v-04823eb6="">
<span data-v-04823eb6=""><i class="iconfont icon-time-on" data-v-04823eb6=""></i>[!--newstime--]</span> <!----> <a href="[!--titleurl--]" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  target="_blank" data-v-04823eb6=""><i class="iconfont icon-look-on" data-v-04823eb6=""></i>查看示图</a>

</div>
</div>
</div>';