多维数组中的求和值？

Question

I just have no idea how to sum and echo values in multidimensional array. This is my array with info about order.

I need to sum RESULT_VALUE and echo one united DESCR list. I have tried lots of things but nothing, never worked with that kind of arrays levels. This is an array with two different products with applied discounts.

Array
(
    [0] => Array
        (
            [ORDER_ID] => 35
            [DISCOUNT_ID] => 18
            [ORDER_COUPON_ID] => 0
            [COUPON_ID] => 
            [RESULT] => Array
                (
                    [BASKET] => Array
                        (
                            [617] => Array
                                (
                                    [RULE_ID] => 248
                                    [APPLY] => Y
                                    [RULE_DESCR_ID] => 248
                                    [ACTION_BLOCK_LIST] => Array
                                        (
                                            [0] => 0
                                        )

                                    [DESCR_DATA] => Array
                                        (
                                            [0] => Array
                                                (
                                                    [TYPE] => 2
                                                    [VALUE] => 10
                                                    [VALUE_TYPE] => P
                                                    [VALUE_ACTION] => D
                                                    [RESULT_VALUE] => 229.905
                                                    [RESULT_UNIT] => RUB
                                                )

                                        )

                                    [DESCR] => Array
                                        (
                                            [0] => discount 10% (229.91 rub.)
                                        )

                                    [DESCR_ID] => 248
                                    [BASKET_ID] => 617
                                    [MODULE] => catalog
                                    [PRODUCT_ID] => 10109
                                )

                            [618] => Array
                                (
                                    [RULE_ID] => 249
                                    [APPLY] => Y
                                    [RULE_DESCR_ID] => 249
                                    [ACTION_BLOCK_LIST] => Array
                                        (
                                            [0] => 0
                                        )

                                    [DESCR_DATA] => Array
                                        (
                                            [0] => Array
                                                (
                                                    [TYPE] => 2
                                                    [VALUE] => 10
                                                    [VALUE_TYPE] => P
                                                    [VALUE_ACTION] => D
                                                    [RESULT_VALUE] => 70.796
                                                    [RESULT_UNIT] => RUB
                                                )

                                        )

                                    [DESCR] => Array
                                        (
                                            [0] => discount 10% (70.80 rub.)
                                        )

                                    [DESCR_ID] => 249
                                    [BASKET_ID] => 618
                                    [MODULE] => catalog
                                    [PRODUCT_ID] => 10054
                                )

                        )

                )

            [ACTION_BLOCK_LIST] => 1
        )

Answer 1

You can use array_walk_recursive to get result. Code below sum all values of key $key wherever they are in the array

$key = 'RESULT_VALUE';
$sum = 0;
array_walk_recursive ($array, 
         function($v, $k, $key) use (&$sum) { 
             if($k === $key) { $sum += $v;}}, 
         $key);

echo $sum;