array_sum

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

    array_sum — Calculate the sum of values in an array

    Description

    array_sum(array $array): int|float

    array_sum() returns the sum of values in an array.

    Parameters

    array

    The input array.

    Return Values

    Returns the sum of values as an integer or float; 0 if the array is empty.

    Changelog

    Version Description
    8.3.0 Now emits E_WARNING when array values cannot be converted to int or float. Previously arrays and objects where ignored whilst every other value was cast to int. Moreover, objects that define a numeric cast (e.g. GMP) are now cast instead of ignored.

    Examples

    Example #1 array_sum() examples

    <?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";
    ?>

    The above example will output:

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

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    User Contributed Notes 2 notes

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    22
    rodrigo at adboosters dot com
    3 years ago
    If you want to calculate the sum in multi-dimensional arrays:<?phpfunction 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
    1
    harl at gmail dot com
    2 years 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.
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