Detailed explanation of the idea of ​​adding secondary navigation in PHPCMS V9

I looked at phpcms today and found a problem when writing the secondary navigation. When querying the navigation bar information, the $r[arrchildid] returned was not consistent with what I imagined. The document said that the sub-column id was returned, but it was somewhat different.

Starting idea:

Homepage

{pc:content action="category" catid="0" num="10" siteid="$siteid" order="listorder ASC"}
{loop $data $r}
{if $r[arrchildid]}{$r[catname]}{pc:content action="category" catid="$r[catid]" num="10" siteid="$siteid" order="listorder ASC" return="data2"}
{loop $data2 $v}{$v[catname]}{/loop}
{/pc}{/if}
{/loop}
{/pc}

General idea: Check whether there is a sub-column id under the document, and if so, output the secondary navigation. Line 5 of the code is to detect whether there is a sub-column ID under the column, but I found that when there is no sub-column, the ID of the current column will be returned, which makes the judgment unable to achieve the expected effect, so I changed my mind and the code is as follows:

Homepage

{pc:content action="category" catid="0" num="10" siteid="$siteid" order="listorder ASC"}
{loop $data $r}
{if $r[arrchildid] != $r[catid]}{$r[catname]}{pc:content action="category" catid="$r[catid]" num="10" siteid="$siteid" order="listorder ASC" return="data2"}
{loop $data2 $v}{$v[catname]}{/loop}
{/pc}{else}{$r[catname]}{/if}
{/loop}
{/pc}

Determine whether the obtained sub-column id is equal to the column id. If it is equal, it means there is no sub-column. If it is not equal, it means there is a sub-column and the sub-column is displayed.

The above is the PHPCMS V9 added by the editor to add secondary navigation. Detailed explanation of the ideas, I hope it will be helpful to everyone. If you have any questions, please leave me a message and the editor will reply to you in time. I would also like to thank you all for your support of the Script House website!

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