I have the following code:

$indexes = [
    ['id' => 1, 'parentid' => 0, 'route' => 'root', 'title' => 'root'],
    ['id' => 2, 'parentid' => 1, 'route' => 'parent', 'title' => 'parent'],
    ['id' => 3, 'parentid' => 2, 'route' => 'child', 'title' => 'child']
];
$parentid = 1;
$indexes = buildSubs($indexes, $parentid);
var_dump($indexes);
function buildSubs(array $elms, int $parentId = 0)
{
    $branch = [];
    foreach ($elms as $elm) {
        if ($elm['parentid'] == $parentId) {
            $children = buildSubs($elms, $elm['id']);
            if ($children) {
                $elms['pages'] = $children;
            }
            $branch[] = $elm;
        }
    }
    return $branch;
}

I'd like to end up with an array in this format:

$index=[
  [
    'id'=>1,
    'pages' => [
       [
         'id'=>2,
         'pages' => [
          [
            'id'=>3
          ]
     ]
];

where the child route is encapsulated into a pages array within the 2nd array with id 2, and id 2 being inside the pages array inside id 1.

Doesn't seem to be working as expected, and am having trouble figuring it out.

CodePudding user response：

Your code works as intended, you just used the whole array$elms instead of $elm. Also, if you wanted the whole tree / route you need to start with the $parentId at 0. Then using your code with the changed variable name and parent id, you get the resulting array:

Array
(
    [0] => Array
        (
            [id] => 1
            [parentid] => 0
            [route] => root
            [title] => root
            [pages] => Array
                (
                    [0] => Array
                        (
                            [id] => 2
                            [parentid] => 1
                            [route] => parent
                            [title] => parent
                            [pages] => Array
                                (
                                    [0] => Array
                                        (
                                            [id] => 3
                                            [parentid] => 2
                                            [route] => child
                                            [title] => child
                                        )

                                )

                        )

                )

        )

)