(PHP 4, PHP 5, PHP 7, PHP 8)

arsortTrie un tableau en ordre décroissant et conserve l'association des index


arsort(array &$array, int $flags = SORT_REGULAR): true

Trie array sur place en ordre décroissant, de telle manière que la corrélation entre les clés et les valeurs soit conservée.

L'usage principal est lors de tri de tableaux associatifs où l'ordre des éléments est important.


Si deux membres se comparent comme égaux, ils maintiennent leur ordre original. Antérieur à PHP 8.0.0, leur ordre relatif dans le tableau trié n'est pas défini.


Réinitialise le pointeur interne du tableau au premier élément.

Liste de paramètres


Le tableau d'entrée.


Le deuxième paramètre optionnel flags peut être utilisé pour modifier le comportement de tri en utilisant ces valeurs :

Type de drapeaux de tri :

Valeurs de retour

Retourne toujours true.


Version Description
8.2.0 Le type de retour est maintenant true, auparavant il était bool.


Exemple #1 Exemple avec arsort()

= array("d" => "lemon", "a" => "orange", "b" => "banana", "c" => "apple");
foreach (
$fruits as $key => $val) {
"$key = $val\n";

L'exemple ci-dessus va afficher :

a = orange
d = lemon
b = banana
c = apple

Les fruits ont été triés en ordre alphabétique inverse, et leurs index respectifs ont été conservés.

Voir aussi

  • sort() - Trie un tableau en ordre croissant
  • asort() - Trie un tableau en ordre croissant et conserve l'association des index
  • Les fonctions de tri des tableaux
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User Contributed Notes 6 notes

stephenakins at gmail dot com
6 years ago
I have two servers; one running 5.6 and another that is running 7. Using this function on the two servers gets me different results when all of the values are the same.


= json_decode('{"706":2,"703":2,"702":2,"696":2,"658":2}', true);





PHP 5.6 results:
Array ( [706] => 2 [703] => 2 [702] => 2 [696] => 2 [658] => 2 )
Array ( [658] => 2 [696] => 2 [702] => 2 [703] => 2 [706] => 2 )

PHP 7 results:
Array ( [706] => 2 [703] => 2 [702] => 2 [696] => 2 [658] => 2 )
Array ( [706] => 2 [703] => 2 [702] => 2 [696] => 2 [658] => 2 )
morgan at anomalyinc dot com
24 years ago
If you need to sort a multi-demension array, for example, an array such as


and you have say, 100 teams here, and want to sort by "TeamPoints":

first, create your multi-dimensional array. Now, create another, single dimension array populated with the scores from the first array, and with indexes of corresponding team_id... ie
$foo[25] = 14
$foo[47] = 42
or whatever.
Now, asort or arsort the second array.
Since the array is now sorted by score or wins/losses or whatever you put in it, the indices are all hoopajooped.
If you just walk through the array, grabbing the index of each entry, (look at the asort example. that for loop does just that) then the index you get will point right back to one of the values of the multi-dimensional array.
Not sure if that's clear, but mail me if it isn't...
12 years ago
Needed to get the index of the max/highest value in an assoc array.
max() only returned the value, no index, so I did this instead.

($x); // optional.
$key_of_max = key($x); // returns the index.
rodders_plonker at yahoo dot com
23 years ago
I was having trouble with the arsort() function on an older version of PHP which was returning an error along the lines of 'wrong perameter count for function arsort' when I tried to use a flag for numeric sorting (2/SORT_NUMERIC).
I figured, as I only wanted to sort integers, I could pad numbers from the left to a specific length with 0's (using the lpad function provided by in the notes at
A string sort then correctly sorts numerically (i.e. {30,2,10,21} becomes {030,021,010,002} not {30,21,2,10}) when echoing the number an (int)$string_name hides the leading 0's.

Made my day :).

jordancdarwin at googlemail dot com
16 years ago
A lot of people seem to trip up on this and ask me questions as to debugging. Bear in mind that this returns boolean, and does not return an array of affected items.

$array = array("One"=>1, "Three" => 3,"Two" =>2);

If successful, will return 1, and error if there is a string used. Useful to note so then people stop asking me :D
12 years ago
If you are dealing with a multidimensional array you want to sort, then this might be helpfull:

function array_sort($arr){
$arr)) return $arr;
$arr as $k => $a){
arsort($arr); // could be any kind of sort
return $arr;
$arr[$k] = array_sort($a);
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