How does dedecms determine that the secondary column is empty and not displayed?

dedecmsHow to determine whether the secondary column is empty and not displayed?

When developing a website with dedecms, if you need to call a secondary column, just use the channelartlist tag. However, if there is no secondary column under this column, an empty DIV will be generated. I tried running PHP to judge the default label, but it was not concise enough. The following is the simplest implementation method.

Recommended study: 梦Weavercms

The latest version of DedeCMS prohibits the running of template PHP. Backend → System → Basic System Parameters → Other Options → The default template engine is disabled Tag, just remove php.

{dede:channelartlist typeid='top'}
<li><a href="{dede:field name=&#39;typeurl&#39;/}">{dede:field name=&#39;typename&#39;/}</a>
{dede:php}
$id = $refObj->Fields[&#39;id&#39;];
$sql = ("SELECT * FROM dede_arctype where reid =&#39;$id&#39;");
$db->SetQuery($sql);
$db->Execute();
if($db->GetTotalRow()){
echo &#39;<ul>&#39;;
while($row = $db->GetArray()){
$url = str_replace(&#39;{cmspath}&#39;,&#39;&#39;,($row[typedir]));
echo "<li><a href=".$url.">".($row[typename])."</a></li>";
};
echo &#39;</ul>&#39;;
};
{/dede:php}
</li>
{/dede:channelartlist}

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