PHP 数组使用唯一计数重新组织

Question

我有以下数组，其中 ID 作为索引，有些作为值。 最终目标是获得另一个数组中唯一 ID 的总数。

Array
(
    [0] => Array
        (
            [0] => Team Object
                (
                    [id] => 1
                    [countStat] => 25
                )
        )
    [1] => Array
        (
            [0] => Team Object
                (
                    [id] => 2
                    [countStat] => 24
                )
        )
    [2] => Array
        (
            [0] => Team Object
                (
                    [id] => 1
                    [countStat] => 23
                )
        )
    [3] => Array
        (
            [0] => Team Object
                (
                    [id] => 3
                    [countStat] => 23
                )
        )
    [4] => Array
        (
            [0] => Team Object
                (
                    [id] => 5
                    [countStat] => 21
                )
        )
    [5] => Array
        (
            [0] => Team Object
                (
                    [id] => 3                    
                    [countStat] => 21
                )
        )
    [6] => Array
        (
            [0] => Team Object
                (
                    [id] => 5
                    [countStat] => 20
                )
        )
    [7] => Array
        (
            [0] => Team Object
                (
                    [id] => 2
                    [countStat] => 20
                )
        )
)

我想要如下结果。

Array
(
    [0] => Array
        (
            [0] => Team Object
                (
                    [id] => 1
                    [countStat] => 48
                )
        )
    [1] => Array
        (
            [0] => Team Object
                (
                    [id] => 2
                    [countStat] => 44
                )
        )

    [3] => Array
        (
            [0] => Team Object
                (
                    [id] => 3
                    [countStat] => 44
                )
        )
    [4] => Array
        (
            [0] => Team Object
                (
                    [id] => 5
                    [countStat] => 41
                )
        )
)

我花了几个小时来研究它，但无法得到解决方案。 有人可以帮忙吗？

谢谢你。

Answer 1

看起来您想为类似的 id 对团队对象的 countStats 求和。 我创建了一个类似的数据结构，循环遍历它以形成一个临时数组，该数组使用 id 作为键，并带有关联的数量（稍后求和 - 我的是数量，你的是 countStats）。 然后将它们相加并重新创建所需的输出。

<?php

class Team
{
    public $id;
    public $amount;
    public function __construct($id, $amount)
    {
        $this->id     = $id;
        $this->amount = $amount;
    }
}

$input =
[
    [new Team(1, 3)],
    [new Team(1, 4)],
    [new Team(2, 5)],
    [new Team(2, 7)]
];

foreach($input as $subarray)
    $amounts[$subarray[0]->id][]=$subarray[0]->amount;

print_r($amounts);

foreach($amounts as $k => $v)
    $result[] = [new Team($k, array_sum($v))];

print_r($result);

输出：

Array
(
    [1] => Array
        (
            [0] => 3
            [1] => 4
        )

    [2] => Array
        (
            [0] => 5
            [1] => 7
        )

)
Array
(
    [0] => Array
        (
            [0] => Team Object
                (
                    [id] => 1
                    [amount] => 7
                )

        )

    [1] => Array
        (
            [0] => Team Object
                (
                    [id] => 2
                    [amount] => 12
                )

        )

)