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
?>
array_sum
(PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)
array_sum — Calcule la somme des valeurs du tableau
Description
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
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User Contributed Notes 6 notes
rodrigo at adboosters dot com ¶
2 years ago
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.
Michele Marsching ¶
2 years 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
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 $sum;
}
echo arraymultisum(array(1,4,5,[1,5,8,[4,5,7]]));
//Answer Will be
//40
?>
sarosekvlad12 at gmail dot com ¶
1 year ago
If you have a case where your array has int in strings, it sums them up as if there were only int in the array!
function sum_mix($a)
{
return array_sum($a);
}
var_dump(sum_mix([9, 3, '7', '3']));
Response will be int(22)
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.
