How to find the sum of two arrays in php

php method to find the sum of two arrays: 1. Create a PHP sample file; 2. Define two arrays $array1 and $array2 containing integer values; 3. Use "array_map()" The function and the anonymous function of addition merge the two arrays into the $sumArray array; 4. "print_r($sumArray)" output can print the new array.

Operating system for this tutorial: Windows 10 system, php8.1.3 version, Dell G3 computer.

To sum two PHP arrays, you can use the array_map() function and the added anonymous function.

Here is a PHP example:

$array1 = array(1, 2, 3);
$array2 = array(4, 5, 6);
$sumArray = array_map(function ($a, $b) { return $a + $b; }, $array1, $array2);
print_r($sumArray);

In the above example, we have defined two arrays $array1 and $array2, which contain integer values. We then merge the two arrays into a $sumArray array using the array_map() function and the additive anonymous function.

The anonymous function has two parameters $a and $b, which represent the values ​​​​in $array1 and $array2 at the same index position. This function returns the result of $a $b. The array_map() function uses this anonymous function to process the corresponding elements of all input arrays and returns the new processed array.

The output result is:

Array
(
    [0] => 5
    [1] => 7
    [2] => 9
)

Among them, [0] is the result of $array1[0] $array2[0], [1] is $array1[1] $array2[1] the result, and so on.

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