Implementation of nested loops of data in Thinkphp _ php instance

This article mainly introduces how to implement the nested loop of data in Thinkphp by category. it is a practical technique applicable to the Association of nested loops, for more information about how to implement nested loops of data in Thinkphp, see the examples in this article. 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:

The code is as follows:

{$ Sub. name}

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

<表1_1>
<表2_1 />
<表2_2>

<表1_2>
<表2_3 />
<表2_4>

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:

The 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:

The code is as follows:

{$ Vo. id}

{$ Sub. title}

Shows the effect:

I hope this article will help you with ThinkPHP programming.