使用 PHP 按 id 将数组拆分为等份顺序

Question

我有一个如下所示的数组列表，如何将它们分成相等的部分，按 id 对相等的部分进行排序，并使用 PHP 在 id 中合并相等的部分？

Array
(
    [0] => Array
        (
            [id] => 121
            [owner] => xa
            [name] => xjs
        )

    [1] => Array
        (
            [id] => 139
            [owner] => xa
            [name] => xjs
        )

    [2] => Array
        (
            [id] => 1456
            [owner] => xv
            [name] => bjs
        )
    [3] => Array
        (
            [id] => 1896
            [owner] => xb
            [name] => bjs
        )
    [4] => Array
        (
            [id] => 1963
            [owner] => xb
            [name] => bjs
        )

)

假设我想把它们分成 2 个相等的项目，先拆分，最小的id先平分，应该是这样的：

Array
(
    [0] => Array
        (
            [id] => 121
            [owner] => xa
            [name] => xjs
        )

    [1] => Array
        (
            [id] => 139
            [owner] => xa
            [name] => xjs
        )
)
Array
(
    [0] => Array
        (
            [id] => 1456
            [owner] => xv
            [name] => bjs
        )
    [1] => Array
        (
            [id] => 1896
            [owner] => xb
            [name] => bjs
        )
)


Array
(
    [0] => Array
        (
            [id] => 1963
            [owner] => xb
            [name] => bjs
        )
)

我的示例代码是5项，如果是6项，应该是[1,2],[3,4],[5,6]，多少项或部分不确定，但我应该是 2 个相等的部分。

其次合并（这是我们项目的逻辑，如果你不懂我在说什么，请忽略合并问题，我只需要知道如何拆分）：

[121, 139] => 合并到 139, [1456, 1896] => 合并到 1896, 新列表：[139, 1896] => 合并到 1896，最后的列表 [1896, 1963] 合并到最终的 id 1963

Answer 1

听起来你想要这样的东西：

$array = [
    [
        'id' => 121,
        'owner' => 'xa',
        'name' => 'xjs',
    ],
    [
        'id' => 139,
        'owner' => 'xa',
        'name' => 'xjs',
    ],
    [
        'id' => 1456,
        'owner' => 'xv',
        'name' => 'bjs',
    ],
    [
        'id' => 1896,
        'owner' => 'xb',
        'name' => 'bjs',
    ],
    [
        'id' => 1963,
        'owner' => 'xb',
        'name' => 'bjs',
    ]
];

// custom function to compare which ID is greater
function customCompare($a, $b)
{
    if ($a['id'] === $b['id']) {
        return 0;
    }
    
    return ($a['id'] < $b['id']) ? -1 : 1;
}

// sort the whole array
usort($array, "customCompare");

// print the whole array as pairs,
// if there is an unpair number
// the last one will be a single member
print_r(array_chunk($array, 2));

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