php - PHP将平面数组转为多维关系数组

Question

可能重复：
从数据库结果生成多维数组的递归函数

考虑以下数组。

    Array
(
    [0] => Array
        (
            [Parent_ID] => 0
            [Child_ID] => 0
            [0] => string:val

        )

    [1] => Array
        (
            [Parent_ID] => 0
            [Child_ID] => 1
            [0] => string:val

        )

    [2] => Array
        (
            [Parent_ID] => 1
            [Child_ID] => 2
            [0] => string:val

        )

    [3] => Array
        (
            [Parent_ID] => 0
            [Child_ID] => 3
            [0] => string:val

        )

我需要把它变成如下内容。

 Array
(
    [0] => Array
        (
            [Parent_ID] => 0
            [Child_ID] => 0
            [0] => string:val

        )

    [1] => Array
        (
            [Parent_ID] => 0
            [Child_ID] => 1
            [0] => string:val


                [2] => Array
                   (
                    [Parent_ID] => 1
                    [Child_ID] => 2
                    [0] => string:val

                    ) 
                   )

    [3] => Array
        (
            [Parent_ID] => 0
            [Child_ID] => 3
            [0] => string:val

        )

除此之外，孩子们也可以拥有无​​限的孩子​​。并不是每个索引都有相同数量的键和值。但是所有人都会有一个父子键/值。

我从这里和其他地方尝试了许多解决方案，但似乎无法做到正确。