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This article is about how dedecms determines whether the second-level column is empty or not. The editor thought it was very practical, so I shared it with you as a reference. Let's follow the editor and have a look.

How does dedecms judge whether the secondary column is empty or not?

When developing a website with dedecms, if you need to call the second-level column, use the channerartlist tag on the line, but if there is no second-level column under this column, there will be an empty DIV. Try the default tag to run PHP judgment, it is not concise enough, the following is the most concise implementation.

The latest version of DedeCMS forbids template PHP to run. Background → system → system basic parameters → other options → default template engine disable tags, just remove php.

{dede:channelartlist typeid='top'} {dede:field name='typename'/} {dede:php} $id= $refObj- > Fields ['id']; $sql = ("SELECT * FROM dede_arctype where reid =' $id'"); $db- > SetQuery ($sql); $db- > Execute (); if ($db- > GetTotalRow ()) {echo'; while ($row = $db- > GetArray ()) {$url = str_replace ('{cmspath}','', ($row [typedir])); echo ". ($row [typename]). Echo';}; {/ dede:php} {/ dede:channelartlist} Thank you for reading! On dedecms how to judge whether the second column is empty or not to share here, I hope the above content can be of some help to you, so that you can learn more knowledge. If you think the article is good, you can share it and let more people see it.

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