PHP 8.3.4 Released!

array_sum

(PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)

array_sumCalcule la somme des valeurs du tableau

Description

array_sum(array $array): int|float

array_sum() retourne la somme des valeurs du tableau array.

Liste de paramètres

array

Le tableau d'entrée.

Valeurs de retour

Retourne la somme des valeurs, sous la forme d'un entier ou d'un nombre décimal 0 si le array est vide.

Historique

Version Description
8.3.0 Émet désormais un E_WARNING lorsque les valeurs de type array ne peuvent pas être converties en entier ou nombre décimal. Auparavant, les tableaux et les objets étaient ignorés tandis que toutes les autres valeurs étaient converties en entier. De plus, les objets définissant une conversion numérique (par exemple, GMP) sont désormais convertis au lieu d'être ignorés.

Exemples

Exemple #1 Exemple avec array_sum()

<?php
$a
= array(2, 4, 6, 8);
echo
"sum(a) = " . array_sum($a) . "\n";

$b = array("a" => 1.2, "b" => 2.3, "c" => 3.4);
echo
"sum(b) = " . array_sum($b) . "\n";
?>

L'exemple ci-dessus va afficher :

sum(a) = 20
sum(b) = 6.9

add a note

User Contributed Notes 6 notes

up
18
rodrigo at adboosters dot com
2 years ago
If you want to calculate the sum in multi-dimensional arrays:

<?php
function array_multisum(array $arr): float {
$sum = array_sum($arr);
foreach(
$arr as $child) {
$sum += is_array($child) ? array_multisum($child) : 0;
}
return
$sum;
}
?>

Example:

<?php
$data
=
[
'a' => 5,
'b' =>
[
'c' => 7,
'd' => 3
],
'e' => 4,
'f' =>
[
'g' => 6,
'h' =>
[
'i' => 1,
'j' => 2
]
]
];

echo
array_multisum($data);

//output: 28
?>
up
0
harl at gmail dot com
1 year ago
array_sum() doesn't "ignore strings if they are not convertible", it converts them to zero. array_product() does the same thing, where the difference between "ignoring" and "converting to zero" is much more obvious.
up
-2
Michele Marsching
1 year ago
Notably the function converts strings to float and ignores strings if they are not convertable:

<?php
$a
= array("String", 2, 4, 6, 8);
echo
"sum(a) = " . array_sum($a) . "\n";

$b = array("12.3456", 2, 4, 6, 8);
echo
"sum(b) = " . array_sum($b) . "\n";
?>

sum(a) = 20
sum(b) = 32.3456
up
-11
samiulmomin191139 at gmail dot com
2 years ago
<?php
//you can also sum multidimentional arrays like this;

function arraymultisum(array $arr){
$sum=null;

foreach(
$arr as $child){
$sum+=is_array($child) ? arraymultisum($child):$child;
}
return
$sum;
}

echo
arraymultisum(array(1,4,5,[1,5,8,[4,5,7]]));

//Answer Will be
//40

?>
up
-4
sarosekvlad12 at gmail dot com
9 months ago
If you have a case where your array has int in strings, it sums them up as if there were only int in the array!
function sum_mix($a)
{
return array_sum($a);
}
var_dump(sum_mix([9, 3, '7', '3']));
Response will be int(22)
up
-24
yakushabb at gmail dot com
2 years ago
array_sum converts strings to integer and array_sum(2,'2') returns 4.

I had no idea.
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