Implementation of nested loops of data by category in Thinkphp and nested in thinkphp

Implementation of nested loops of data by category in Thinkphp and nested in thinkphp

This article describes how to implement a nested loop of data in Thinkphp by category. Share it with you for your reference. The specific implementation method is as follows:

During thinkphp, nested loops are used in the loop, and the second loop is associated with the outside.
The thinkphp official website provides the following documents:

Copy codeThe Code is as follows: <volist name = "list" id = "vo">
<Volist name = "vo ['sub']" id = "sub">
{$ Sub. name}
</Volist>
</Volist>

The tables I want to use here are: classification table (table 1) and data table (table 2)
The effect to be achieved is:

<Table 1_1>
<Table 2_1/>
<Table 2_2>
</Table 1_1>
<Table 1_2>
<Table 2_3/>
<Table 2_4>
</Table 1_2>

In fact, the principle is to first identify the classification table (table 1), then associate Table 1 and Table 2 for query, and finally output the data in a two-dimensional array.

The background code is as follows:

Copy codeThe Code is as follows: $ m = M ('table 1 ');
$ M1 = M ('table 2 ');

$ Parent = $ m-> select ();
Foreach ($ parent as $ n => $ val ){
$ Parent [$ n] ['voo'] = $ m1-> where ('field associated with table 1 in Table 2 = '. $ val ['table 1id']. '')-> select ();
}
$ This-> assign ('LIST', $ parent );
$ This-> display ();
Foreground output:

Copy codeThe Code is as follows: <volist name = "list" id = "vo">
<Li> <B >{$ vo. id} </B> </li>
<Volist name = "vo ['voo']" id = "sub">
<Li >{$ sub. title} </li>
</Volist>
</Volist>
Shows the effect:

I hope this article will help you with ThinkPHP programming.

Thinkphp nested loop

<Volist name = "article" id = "vo">
<Volist name = "vo ['Post _ tag']" id = "sub">
{$ Sub}
</Volist>
</Volist>

How to nest a loop in thinkphp