维护数字索引关联的array_multisort [重复]答案

【问题标题】：array_multisort with maintaining numeric index association [duplicate]维护数字索引关联的array_multisort [重复]
【发布时间】：2014-05-19 14:46:15
【问题描述】：

我可以对多维数组进行排序，但不保持数字索引关联。

如何保持数字索引关联？

代码：

$waiters[76] = array('weight' => 67, 'specialties' => 1);
$waiters[14] = array('weight' => 41, 'specialties' => 2);
$waiters[58] = array('weight' => 85, 'specialties' => 3);
$waiters[89] = array('weight' => 98, 'specialties' => 4);
$waiters[68] = array('weight' => 86, 'specialties' => 5);
$waiters[31] = array('weight' => 13, 'specialties' => 6);
print_r($waiters);
// Obtain a list of waiters
foreach ($waiters as $id => $waiter) {
    $weight[$id]        = $waiter['weight'];
    $specialties[$id]   = $waiter['specialties'];

}

// Sort the data with weight descending, specialties ascending
// Add $data as the last parameter, to sort by the common key
array_multisort(
    $weight, SORT_DESC, SORT_NUMERIC, 
    $specialties, SORT_ASC, SORT_NUMERIC, 
    $waiters
);
print_r($waiters);

输出：

Array
(
    [0] => Array
        (
            [weight] => 98
            [specialties] => 4
        )

    [1] => Array
        (
            [weight] => 86
            [specialties] => 5
        )

    [2] => Array
        (
            [weight] => 85
            [specialties] => 3
        )

    [3] => Array
        (
            [weight] => 67
            [specialties] => 1
        )

    [4] => Array
        (
            [weight] => 41
            [specialties] => 2
        )

    [5] => Array
        (
            [weight] => 13
            [specialties] => 6
        )

)

期望的输出：

Array
(
    [89] => Array
        (
            [weight] => 98
            [specialties] => 4
        )

    [68] => Array
        (
            [weight] => 86
            [specialties] => 5
        )

    [58] => Array
        (
            [weight] => 85
            [specialties] => 3
        )

    [76] => Array
        (
            [weight] => 67
            [specialties] => 1
        )

    [14] => Array
        (
            [weight] => 41
            [specialties] => 2
        )

    [31] => Array
        (
            [weight] => 13
            [specialties] => 6
        )

)

【问题讨论】：

@Naruto 可能的重复使用的是usort，但我使用的是array_multisort
改为创建您自己的用户函数，这将解决您的问题并使问题相同。
@vogomatix 请检查问题编辑。老问题是让它重复。现在它不应该重复。
你没有抓住重点——问题的答案仍然是创建你自己的比较函数并使用链接问题所暗示的 uasort，仅仅因为存在 anarray_multisort 方法并不一定意味着你必须使用它。
@SazzadHossainKhan 如果您阅读过 array_multisort 的文档，您就会知道无法保留索引。它清楚地说明，我引用：'关联（字符串）键将被保留，但数字键将被重新索引。'

标签： php arrays array-multisort

【解决方案1】：

$keys = array_keys($waiters);
array_multisort(
    $weight, SORT_DESC, SORT_NUMERIC,
    $specialties, SORT_ASC, SORT_NUMERIC,
    $waiters, $keys
);
$waiters = array_combine($keys, $waiters);

或使用 uasort

uasort(
    $data,
    function ($some_data, $another_data) {

        $result = 0;

        if ($some_data['weight'] > $another_data['weight']) {
            $result = -1;
        } elseif ($some_data['weight'] < $another_data['weight']) {
            $result = 1;
        } elseif ($some_data['specialties'] > $another_data['specialties']) {
            $result = 2;
        } elseif ($some_data['specialties'] < $another_data['specialties']) {
            $result = -2;
        }

        return $result;

    }
);

但是 uasort 的性能明显比 array_multisort 差

【讨论】：

【解决方案2】：

对于您想要的输出，请使用以下代码：

<?php
$waiters[76] = array('weight' => 67, 'specialties' => 1);
$waiters[14] = array('weight' => 41, 'specialties' => 2);
$waiters[58] = array('weight' => 85, 'specialties' => 3);
$waiters[89] = array('weight' => 98, 'specialties' => 4);
$waiters[68] = array('weight' => 86, 'specialties' => 5);
$waiters[31] = array('weight' => 13, 'specialties' => 6);

//ksort($waiters);
//$waiters = array_reverse($waiters, true);
print_r($waiters);
// Obtain a list of waiters
foreach($waiters as $id=>$w){
    $w[$id] = $w['weight'];
}
    foreach ($waiters as $ii => $va) {
        $sorter[$ii] = $va['weight'];

    }

    natcasesort($sorter);
    foreach ($sorter as $ii => $va) {
        $ret[$ii] = $waiters[$ii];
    }

    echo "<pre>";
    $ret = array_reverse($ret, true);
    print_r($ret);

?>

【讨论】：

或者你可以简单地在这里发布代码。
详细解释我如何在这里发布我的代码
当有帮助部分时，我为什么要这样做？ stackoverflow.com/editing-help#code
为什么我必须遵守所有的编码标准？我只是在这里为他们想要的人提供更好的解决方案。看看我为他们做了什么。所以不要因为你的错误意见而让他们失望。