PHP -如何通过递归获得所有的孩子？

function getAllChildren($parent, $children) {
    $result = array();
    
    foreach ($children as $child) {
        if ($child['parent'] == $parent) {
            $result[] = $child;
            $result = array_merge($result, getAllChildren($child['id'], $children));
        }
    }
    
    return $result;
}

// 示例数据
$children = array(
    array('id' => 1, 'parent' => 0, 'name' => 'A'),
    array('id' => 2, 'parent' => 1, 'name' => 'B'),
    array('id' => 3, 'parent' => 1, 'name' => 'C'),
    array('id' => 4, 'parent' => 2, 'name' => 'D'),
    array('id' => 5, 'parent' => 2, 'name' => 'E'),
    array('id' => 6, 'parent' => 3, 'name' => 'F'),
);

$allChildren = getAllChildren(1, $children);
print_r($allChildren);

Array
(
    [0] => Array
        (
            [id] => 2
            [parent] => 1
            [name] => B
        )

    [1] => Array
        (
            [id] => 3
            [parent] => 1
            [name] => C
        )

    [2] => Array
        (
            [id] => 4
            [parent] => 2
            [name] => D
        )

    [3] => Array
        (
            [id] => 5
            [parent] => 2
            [name] => E
        )

    [4] => Array
        (
            [id] => 6
            [parent] => 3
            [name] => F
        )

)