A _php example of the implementation of data nested loops by classification in thinkphp

In this paper, we describe the method of data nesting by classification in thinkphp. Share to everyone for your reference. The implementation methods are as follows:

When doing thinkphp, you use loops inside the loop, and the second loop is associated with the outside.
Thinkphp's official website gives the following documents:

Copy Code code as follows:

<volist name= "list" id= "Vo" >
<volist name= "vo[' Sub '" "Id=" sub ">
{$sub. Name}
</volist>
</volist>

The table I want to use here is: Category table (table 1), Datasheet (table 2)
The effect you want to implement 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), and then table 1 and table 2 associated with the query, and finally the two-dimensional array of output

The background code is as follows:

Copy Code code as follows:

$m =m (' table 1 ');
$m 1=m (' Table 2 ');

$parent = $m->select ();
foreach ($parent as $n => $val) {
$parent [$n] [' Voo ']= $m 1->where (' The field associated with table 2 and 1 = '. $val [' Table 1id ']. ') ->select ();
}
$this->assign (' list ', $parent);
$this->display ();

The foreground output shows:

Copy Code code 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>

The effect is shown in the following illustration:

I hope this article will help you with the thinkphp program design.