多维数组中的求和值

Question

I want to sum the values of the following array I would like to group the same items by cumulating them, the output format would also be an array

Array
(
    [0] => Array
        (
            [0] => Array
                (
                    [0] => R421_FD03
                    [1] => 1
                )

            [1] => Array
                (
                    [0] => R421_FD03
                    [1] => 1
                )

        )

    [1] => Array
        (
            [0] => Array
                (
                    [0] => R421_FD03
                    [1] => 1
                )

            [1] => Array
                (
                    [0] => R421_FD02
                    [1] => 1
                )

        )

)

I tested this code but the result is not the one I'm waiting for:

$sumArray = array();

        array_walk_recursive($data, function($item, $key) use (&$sumArray){
            $sumArray[$key] = isset($sumArray[$key]) ?  $item + $sumArray[$key] : $item;
        });

The result I'm waiting for is this one

Array
(
    [0] => Array
        (
            [0] => R421_FD03
            [1] => 3
        )

    [1] => Array
        (
            [0] => R421_FD02
            [1] => 1
        )

     )
)

Answer 1

You can apply simple foreach() with array_values()

$final_array = [];

foreach($array as $arr){
    foreach($arr as $ar){
        $final_array[$ar[0]][0] = $ar[0];
        $final_array[$ar[0]][1] = (isset($final_array[$ar[0]][1])) ?  $final_array[$ar[0]][1] + $ar[1] : $ar[1];
    }

}

$final_array = array_values($final_array);
print_r($final_array);

Output:-https://3v4l.org/lABWG