如何根据特定值按降序对数组进行排序[重复]

Posted 2023-02-23

【中文标题】如何根据特定值按降序对数组进行排序[重复]

【英文标题】：How to sort array in descending order based on a specific value [duplicate]

【发布时间】：2013-03-06 17:54:01

【问题描述】：

我有很多新闻，比如

Array
(
  [0] => Array
    (
        [news_published] => 1337192831
        [news_category] => 5
    )

  [1] => Array
    (
        [news_published] => 1334566743
        [news_category] => 5
    )

  [2] => Array
    (
        [news_published] => 1340092425
        [news_category] => 6
    )

  [3] => Array
    (
        [news_published] => 1339740173
        [news_category] => 6
    )

  [4] => Array
    (
        [news_published] => 1336148837
        [news_category] => 6
    )
)

如何按降序对 news_published 进行排序....我已尝试使用 'usort' 但无法正确找到结果，谁能建议我？

【问题讨论】：

uksort: 试试第一个例子……

发布您的 usort() 尝试，usort 应该可以工作，因为它将使用元素的 VALUE 而不是键

***.com/questions/2699086/…

php.net/manual/en/array.sorting.php

【参考方案1】：

试试这个：

$arr  = your array;
$sort = array();
foreach($arr as $k=>$v) 
    $sort['news_published'][$k] = $v['news_published'];


array_multisort($sort['news_published'], SORT_DESC, $arr);

echo "<pre>";
print_r($arr);

【参考方案2】：

<?php


 $array = array( array('news_published'=>'1337192831','news_category'=>'5'),
            array('news_published'=>'1337192231','news_category'=>'5'),                
            array('news_published'=>'1337192921','news_category'=>'6'),

           );
  / orignal array
 print_r($array);

foreach ($array as $key => $row) 
$new_published[$key] = $row['news_published'];
 
array_multisort($new_published, SORT_DESC,$array);

 // sorted array
print_r($array);

 ?>

【参考方案3】：

或者这个：

function sortForMe($a, $b)

    if ((int)$a['news_published'] === (int)$b['news_published']) 
        return 0;
    
    return (int)$a['news_published'] < (int)$b['news_published'] ? -1 : 1;


usort($array, 'sortForMe');

你可以使用类中的函数或静态方法 - 你的选择:)