PHP Sum Of arrays inside a multidimensional array

Question

Need a little help here with summing up arrays inside a multi dimensional php array

Eg Multidimensional array

Array
(
    [0] => Array
        (
              


        

Answer 1

This should work for arrays like the one of your example ($arr is an array like the one in your example, I haven't defined it here for simplicity's sake):

$res = array();
foreach($arr as $value) {
    foreach($value as $key => $number) {
        (!isset($res[$key])) ?
            $res[$key] = $number :
            $res[$key] += $number;
    }
}

print_r($res);