我想在php中对数组进行排序[重复]答案

【问题标题】：i want to sort an array in php [duplicate]我想在php中对数组进行排序[重复]
【发布时间】：2019-10-19 15:46:23
【问题描述】：

Array
(
    [0] => Array
        (
            [count] => 9
            [slug] => concediat-reangajat
        )

    [1] => Array
        (
            [count] => 7
            [slug] => salarii-5togo
        )

    [2] => Array
        (
            [count] => 10
            [slug] => piata-fortei-munca
        )

    [3] => Array
        (
            [count] => 3
            [slug] => productivitate-angajati
        )

    [4] => Array
        (
            [count] => 1
            [slug] => stocare-date
        )

    [5] => Array
        (
            [count] => 4
            [slug] => infrastructura-leadership
        )

    [6] => Array
        (
            [count] => 2
            [slug] => airbnb-uber
        )

    [7] => Array
        (
            [count] => 5
            [slug] => salarii-productivitate
        )

    [8] => Array
        (
            [count] => 2
            [slug] => ceo-resurse-umane
        )

    [9] => Array
        (
            [count] => 3
            [slug] => hr-ceo
        )

    [10] => Array
        (
            [count] => 1
            [slug] => burnout-tratament
        )

    [11] => Array
        (
            [count] => 1
            [slug] => angajati-vanzarea-afacerii
        )

    [12] => Array
        (
            [count] => 1
            [slug] => job-linkedin
        )

    [13] => Array
        (
            [count] => 1
            [slug] => primul-faliment
        )

    [14] => Array
        (
            [count] => 3
            [slug] => salariu-mic
        )

    [15] => Array
        (
            [count] => 1
            [slug] => varsta-programatori
        )

)


i want to sort this array based on decending order of count

此数组包含数据数组计数和 slug 变量我想根据计数的降序对整个数组进行排序我怎么能把这个..任何人都可以帮助我我尝试了 usort、ksort 等我是编程新手没有得到解决方案请帮我我尝试了解决方案但它没有用有谁能解决吗？

【问题讨论】：

标签： php arrays sorting multidimensional-array

【解决方案1】：

usort 与 callback 将为您工作。

usort($array, function($a, $b) {
    return $b['count'] - $a['count']; # $a['count'] - $b['count']; will sort asc
});

工作演示： https://3v4l.org/SUa2F

或者用arsort($array);做简单的事情

工作演示： https://3v4l.org/bnWuo

【讨论】：

那么如何打印数组呢？
$lattt=usort($latest, function($a, $b) { return $a['count'] - $b['count']; }); echo '
```
'.print_r($lattt,true).'
```
';不打印
@ANGELA 看看我的工作演示 :)
usort() 按原样处理数组，因此排序后 - print_r($latest) 而不是返回值。
@Always Sunny 太感谢了，怎么可以降序排列呢？

【解决方案2】：

按计数降序反向排序（对于类似计数，名称升序）：

<?php

$items =
[
    ['count'=>2, 'name' => 'Janitor'],
    ['count'=>5, 'name' => 'Plumber'],
    ['count'=>1, 'name' => 'Scrubber'],
    ['count'=>3, 'name' => 'Winkle Picker'],
    ['count'=>3, 'name' => 'Window Cleaner']
];

usort($items, function($a, $b) {
    $compare = $b['count'] <=> $a['count'];
    if($compare == 0)
        $compare = $a['name'] <=> $b['name'];

    return $compare;
});

var_export($items);

输出：

array (
    0 => 
    array (
      'count' => 5,
      'name' => 'Plumber',
    ),
    1 => 
    array (
      'count' => 3,
      'name' => 'Window Cleaner',
    ),
    2 => 
    array (
      'count' => 3,
      'name' => 'Winkle Picker',
    ),
    3 => 
    array (
      'count' => 2,
      'name' => 'Janitor',
    ),
    4 => 
    array (
      'count' => 1,
      'name' => 'Scrubber',
    ),
  )

【讨论】：