how to calculate sum of total key in same array - php

Question

i need to calculate the total key within the following array that contains 4 different sub arrays
Array
(
[0] => Array
(
[total] => 4.2
[sku] => 4321
)
[1] => Array
(
[total] => 2
[sku] => 2456
)
[2] => Array
(
[total] => 3
[sku] => 2245
)
[3] => Array
(
[total] => 1.5
[sku] => 2674
)
)
i was calculating it using mysql directly but i prefer to use php
$sql = "SELECT SUM(CAST(IFNULL(total,0) AS DECIMAL(10,2))) FROM trans WHERE trans.userid = :userid";
so total has to be in the same format as from the query
10.70

Answer 1

You can loop over the array, adding up as you go, and then formatting with number_format(), or use array_column() to extract the 'total', and use array_sum() to add them, and again, using number_format() or sprintf() to format them.
echo number_format(array_sum(array_column($array, 'total')), 2);

Answer 2

I guess something like this:-
$array = Array
(
[0] => Array
(
[total] => 4.2
[sku] => 4321
)
[1] => Array
(
[total] => 2
[sku] => 2456
)
[2] => Array
(
[total] => 3
[sku] => 2245
)
[3] => Array
(
[total] => 1.5
[sku] => 2674
)
);
$total = 0;
foreach ($array as $key => $value) {
$total += $value['total'];
}
print_r($total);

Answer 3

you can iterate your array and sum all values like:
<?php
$array = array(
array(
'total' => 4.2,
'sku' => 4321
),
array(
'total' => 2,
'sku' => 2456
),
array(
'total' => 3,
'sku' => 2245
),
array(
'total' => 1.5,
'sku' => 2674
),
);
$result = array('total' => 0,'sku' => 0);
foreach($array as $key => $value) {
$result['total'] += $value['total'];
$result['sku'] += $value['sku'];
}
var_dump($result);
Result: array(2) { ["total"]=> float(10.7) ["sku"]=> int(11696) }
for single total sum output:
echo $result['total'];

Answer 4

You can also try with array_walk_recursive() like this https://eval.in/875555
$input = [your_2d_array_goes_here];
$final = array();
array_walk_recursive($input, function($item, $key) use (&$final){
$final[$key] = isset($final[$key]) ? $item + $final[$key] : $item;
});
print '<pre>';
print_r($final);
print '</pre>';
print $final['total'];
?>