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# array_sum

(PHP 4 >= 4.0.4, PHP 5)

array_sum -- Calculate the sum of values in an array.

## Description

number array_sum ( array array)

array_sum() returns the sum of values in an array as an integer or float.

示範 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 printout of the program above will be:

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

> 備注: PHP versions prior to 4.2.1 modified the passed array itself and converted strings to numbers (which most of the time converted them to zero, depending on their value).

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