PHP hierarchical array - Parents and childs

Question

I use PHP and mySQL with Idiorm. That might not be relevant.

My PHP array

• It\'s a relationship between parents and childs.
• 0

Answer 1

public function createTree (&$list, $parentId = null) {
    $tree = array();
    foreach ($list as $key => $eachNode) {
        if ($eachNode['parentId'] == $parentId) {
            $eachNode['children'] = $this->createTree ($list,$eachNode['id']);
            $tree[] = $eachNode;
            unset($list[$key]);
        }
    }
    return $tree;
}

In that function pass the associative array and if the most parent is not null then just pass the most parent id as second argument.