foreach iterates through the parent array, then iterates through the subarray, how to stitch the parent-child array

Description: The parent array contains a unique pid,pid by calling the M-layer to get the contents of the sub-array, requiring the parent and child arrays to have the same key and then merging them together
Code

foreach($parentArray as $v){    $a['id']=$v['pid'];    $a['name'] =$v['name'];    ...    $array[] =$a;    $childContent = $m->getChildContent($v['pid']);    foreach($childContent as $v2){        $b['id']=$v2['cid'];        $b['name']=$v2['cname'];        ...        $array2[]=$b;    }}

I want to make the output such a format

array[0]{    $array里的内容，    $array2里的内容}array[1]{   $array,   $array2,}

Because it is an infinite rating, you want to combine the first and child array groups of the foreach traversal array into an array,
Final output style:
Parent Parents Column
--child Sub-column
Parent Parents Column
--child Sub-column
Parent Parents Column
--child Sub-column
.....

Reply content:

Description: The parent array contains a unique pid,pid by calling the M-layer to get the contents of the sub-array, requiring the parent and child arrays to have the same key and then merging them together
Code

foreach($parentArray as $v){    $a['id']=$v['pid'];    $a['name'] =$v['name'];    ...    $array[] =$a;    $childContent = $m->getChildContent($v['pid']);    foreach($childContent as $v2){        $b['id']=$v2['cid'];        $b['name']=$v2['cname'];        ...        $array2[]=$b;    }}

I want to make the output such a format

array[0]{    $array里的内容，    $array2里的内容}array[1]{   $array,   $array2,}

Because it is an infinite rating, you want to combine the first and child array groups of the foreach traversal array into an array,
Final output style:
Parent Parents Column
--child Sub-column
Parent Parents Column
--child Sub-column
Parent Parents Column
--child Sub-column
.....

I don't know if you're talking about a situation that is similar to an infinite classification.
If parent and child are placed on the same table (should also be)
If there's only two floors, that's what I usually do.
Then the query is sorted by PID

ORDER BY `pid` ASC

Then iterate through the array

$result = array();foreach($data as $v) {    if($v['pid'] == 0) {        $result[$v['id']] = $v;        continue;    }    $result[$v['pid']]['chlid'][] = $v;}var_dump($result);

If you need three layers, for example,

array(    array(        'id',        'pid',        'child' => array(            array(                'id',                'pid',                'child' => array(                    ...                ),            ),        ),    ),)

In that case, I find this way a bit of trouble.

Resources:http://www.cnblogs.com/yangmanyan/archive/2011/06/16/2082963.html

Sorry to update, the results from the database query, even if the field type is integer type, query out is also a string.
So it should be $v['pid'] == 0 or $v['pid'] === '0' .

To be converted to: o:27: "Guzzlehttp\cookie\cookiejar": 2:

