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

I added to @Jens Törnell's answers to enable defining the options for the column name of parent_id, the children array key name, and also the column name for id.

/**
 * function buildTree
 * @param array $elements
 * @param array $options['parent_id_column_name', 'children_key_name', 'id_column_name'] 
 * @param int $parentId
 * @return array
 */
function buildTree(array $elements, $options = [
    'parent_id_column_name' => 'parent_id',
    'children_key_name' => 'children',
    'id_column_name' => 'id'], $parentId = 0)
    {
    $branch = array();
    foreach ($elements as $element) {
        if ($element[$options['parent_id_column_name']] == $parentId) {
            $children = buildTree($elements, $options, $element[$options['id_column_name']]);
            if ($children) {
                $element[$options['children_key_name']] = $children;
            }
            $branch[] = $element;
        }
    }
    return $branch;
}

Since the functionality is quite universal, I managed to use the above function in most of my projects.