Using PHP's array_sum() Function to Sum Array Elements

In PHP, arrays are commonly used and often need their elements summed; the built‑in array_sum() function provides this capability.

Function Overview

The array_sum() function calculates the total of all values in an array. Its syntax is:

array_sum(array $array): float|int

Parameters

$array

(required) – the array whose values are to be summed.

Return value: the sum of the array’s elements; integer if all values are integers, otherwise float.

Example

The following example demonstrates using array_sum() to compute the sum of an array:

<?php
$nums = array(1, 2, 3, 4, 5);
$total = array_sum($nums);
echo "数组元素总和为：$total";
?>

Output

数组元素总和为：15

Notes

If the array is empty, the function returns 0.

Non‑numeric elements are ignored; only numeric values are summed.

Conclusion

This article introduced the usage of PHP’s array_sum() function, provided a simple example, and highlighted important considerations for practical development.