Display a sum of two array values with same keys - php

Question

I have two array with same keys this two array contain month wise data of my table. i want sum of this values and return same keys sum of values in one other array
Here is my two array
array1
Array ( [0] => Array ( [0] => Jan [1] => 0 )
[1] => Array ( [0] => Feb [1] => 22 )
[2] => Array ( [0] => Mar [1] => 0 )
[3] => Array ( [0] => Apr [1] => 9 )
[4] => Array ( [0] => May [1] => 1 )
[5] => Array ( [0] => Jun [1] => 0 )
[6] => Array ( [0] => Jul [1] => 0 )
[7] => Array ( [0] => Aug [1] => 0 )
[8] => Array ( [0] => Sep [1] => 0 )
[9] => Array ( [0] => Oct [1] => 0 )
[10] => Array ( [0] => Nov [1] => 0 )
[11] => Array ( [0] => Dec [1] => 0 )
)
array 2:
Array ( [0] => Array ( [0] => Jan [1] => 0 )
[1] => Array ( [0] => Feb [1] => 0 )
[2] => Array ( [0] => Mar [1] => 18 )
[3] => Array ( [0] => Apr [1] => 1 )
[4] => Array ( [0] => May [1] => 1 )
[5] => Array ( [0] => Jun [1] => 0 )
[6] => Array ( [0] => Jul [1] => 0 )
[7] => Array ( [0] => Aug [1] => 0 )
[8] => Array ( [0] => Sep [1] => 0 )
[9] => Array ( [0] => Oct [1] => 0 )
[10] => Array ( [0] => Nov [1] => 0 )
[11] => Array ( [0] => Dec [1] => 0 )
)
i also tried using this code
function sum_arrays($array1, $array2) {
$array = array();
foreach($array1 as $index => $value) {
$array[$index] = isset($array2[$index]) ? $array2[$index] + $value : $value;
}
return $array;
}
i want result like below
Array ( [0] => Array ( [0] => Jan [1] => 0 )
[1] => Array ( [0] => Feb [1] => 22 )
[2] => Array ( [0] => Mar [1] => 18 )
[3] => Array ( [0] => Apr [1] => 10 )
[4] => Array ( [0] => May [1] => 2 )
[5] => Array ( [0] => Jun [1] => 0 )
[6] => Array ( [0] => Jul [1] => 0 )
[7] => Array ( [0] => Aug [1] => 0 )
[8] => Array ( [0] => Sep [1] => 0 )
[9] => Array ( [0] => Oct [1] => 0 )
[10] => Array ( [0] => Nov [1] => 0 )
[11] => Array ( [0] => Dec [1] => 0 )
)

Answer 1

array_map approach (if 2 arrays have month items in same order):
// shortened array samples
$arr1 = [
["Jan", 0],
["Feb", 22],
["Mar", 0]
];
$arr2 = [
["Jan", 0],
["Feb", 0],
["Mar", 18]
];
$result = array_map(function($a, $b){
return [$a[0], $a[1] + $b[1]];
}, $arr1, $arr2);
print_r($result);
The output:
Array
(
[0] => Array
(
[0] => Jan
[1] => 0
)
[1] => Array
(
[0] => Feb
[1] => 22
)
[2] => Array
(
[0] => Mar
[1] => 18
)
)

Answer 2

Using The foreach Loop:
$sum = 0;
foreach($items as $item) {
$sum += $item['qty'];
}
echo $sum;
Using array_map():
echo array_sum(array_map(
function($item) {
return $item['qty'];
}, $items)
);
Using array_reduce():
echo array_reduce($items, function($carry, $item) {
$carry += $item['qty'];
return $carry;
});