PHP: move values of array under others keys - php

Question

I have this array:
Array
(
[0] => Array
(
[id] => 1
[amount_positive] => 10.00
[negative_sum] => -5,7
[negative] => Array
(
[0] => Array
(
[amount] => -3.00
)
[1] => Array
(
[amount] => -2.00
)
[2] => Array
(
[amount] => -0.70
)
)
)
[1] => Array
(
[id] => 13
[amount_positive] => 6.00
[negative_sum] => -7
[negative] => Array
(
[0] => Array
(
[amount] => -7
)
)
)
)
You can note that key 0 has +10.00 of positive and -5.7 of negative (they are money transactions).
Key 1 has +13 and -7.
Basically, I need to iterate into array and move 4.30 under key 0, taken from THE NEGATIVE of key 1.
This is must be the final array:
Array
(
[0] => Array
(
[id] => 1
[amount_positive] => 10.00
[negative_sum] => -10.00
[negative] => Array
(
[0] => Array
(
[amount] => -3.00
)
[1] => Array
(
[amount] => -2.00
)
[2] => Array
(
[amount] => -0.70
)
[3] => Array
(
[amount] => -4.30
)
)
)
[1] => Array
(
[id] => 13
[amount_positive] => 6.00
[negative_sum] => -2.70
[negative] => Array
(
[0] => Array
(
[amount] => -2.70
)
)
)
)

Answer 1

If you need code that performs the transformation on this particular array (where you know the array indexes), the following will do what you want:
$expense = -4.30;
$your_array[0]['negative'][] = ['amount' => $expense];
$your_array[0]['negative_sum'] += $expense;
$your_array[1]['negative'][0]['amount'] -= $expense;
$your_array[1]['negative_sum'] -= $expense;
If you want a more "general" approach for arbitrary indexes and arbitrary amount entries, you will need to rephrase your question in broader terms.