How to sort array in descending order based on a specific value [duplicate]

Question

I have an array of news like

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
    )
)

How I can sort news_published by descending order....I have tried with 'usort' but cant find the result properly can anyone suggest me?

post your usort() attempt, usort should work as it will use the VALUE of the elements not the key — Waygood
– Waygood, Commented Mar 18, 2013 at 11:53

Prasanth Bendra · Accepted Answer · 2013-03-18 11:51:40Z

10

Try this :

$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);

answered Mar 18, 2013 at 11:51

Prasanth Bendra

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Comments

alwaysLearn · Accepted Answer · 2013-03-18 12:02:15Z

0

<?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);

 ?>

answered Mar 18, 2013 at 12:02

alwaysLearn

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Comments

mkjasinski · Accepted Answer · 2013-03-18 12:05:49Z

0

Or this:

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');

you can use function or static method from class - your choice :)

answered Mar 18, 2013 at 12:05

mkjasinski

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