Kdchxue describes how to call subtopics in the parent section of V9

We need to use subtopics of calling columns when creating templates. The following article will teach you how to achieve the goal, which is quite simple. The Code is as follows:

On the second-level column list page, call:
<! --
* Obtain subtopics
* @ Param $ parentid parent ID
* @ Param $ type topic type
* @ Param $ whether self contains itself 0 is not included
* @ Param $ siteid site ID
-->
<Divclass = "arrchildid_list">
{PHP $ j = 1 ;}
{Loop subcat ($ parentid) $ v}
{PHP if ($ V ['type']! = 0) continue ;}
<A href = "{$ V [url]}"> [{$ V [catname]}] </a>
{/Loop}
</Div>

On the first-level topic list page, call the [or first-level topic page]:

<! --
* Obtain subtopics
* @ Param $ parentid parent ID
* @ Param $ type topic type
* @ Param $ whether self contains itself 0 is not included
* @ Param $ siteid site ID
-->
<Divclass = "arrchildid_list">
{PHP $ j = 1 ;}{ loop subcat ($ catid) $ v}
{PHP if ($ V ['type']! = 0) continue ;}
<A href = "{$ V [url]}"> [{$ V [catname]}] </a>
{/Loop}
</Div>
 
PS: when calling the list page of the second-level column, you can also call it as follows:
{PC: Content action = "category" catid = "$ parentid" num = "25" siteid = "$ siteid" Order = "listorder ASC "}
{Loop $ data $ R}
<A href = "{$ R [url]}" >{$ R [catname]} </a> <span >|</span>
{/Loop}
{/PC}

Parameters are as follows:

Field	Type	Default Value	Description
Catid	Smallint	None	Topic ID
Siteid	Tinyint (3)	0	Site ID
Module	Varchar (15)	None	Module ID
Type	Tinyint (1)	1	Topic type ID
Modelid	Tinyint (5)	5	Model ID
Parentid	Smallint (5)	5	Parent topic
Arrparentid	Varchar (255)	None	All parent Columns
Child	Tinyint (1)	0	Subtopic
Arrchildid	Mediumtext	None	All subtopics
Catname	Varchar (30)	None	Topic name
Image	Varchar (100)	None	Topic Image
Description	Mediumtext	None	Topic description
Parentdir	Varchar (100)	None	Parent topic directory
Catdir	Varchar (30)	None	Topic directory
URL	Varchar (100)	None	Topic Link
Items	Mediumint (8)	0	Number of topic content
Hits	INT (10)	0	Clicks
Setting	Mediumtext	None	Topic settings
Listorder	Smallint (5)	0	Sort
Ismenu	Tinyint (1)	0	Show?
Sethtml	Tinyint (1)	0	Generate to root directory?
Letter	Varchar (30)	None	Topic pinyin