calcultion based on items minus stock value php - php

Question

I have a calcultion based on items minus stock value (with some community help). If it hits zero then the next row will be touched.
$items = 45;
$stockRows = [40, 50, 60];
$newStock = function ($items, $stock) {
foreach ($stock as &$item) {
$delta = $item - $items;
$item = $delta > 0 ? $delta : 0;
$items = $delta < 0 ? abs($delta) : 0;
}
return $stock;
};
print_r($newStock($items, $stockRows));
Output
Array
(
[0] => 0
[1] => 45
[2] => 60
)
Now I want to add a row identifier so that I can update the database rows afterwards in a foreach and set the correct stock amount
$stockRows =
array(
array(
'id' => 1,
'amount' => 30
),
array(
'id' => 2,
'amount' => 40
),
array(
'id' => 3,
'amount' => 50
)
);
I cant get this to work. And if I get a output the first array result returns id 0.

Answer 1

Fixed it myself
$items = 45;
$ids = [1, 2, 3];
$stockRows = [40, 50, 60];
$newStock = function ($afschrijving, $stock, $ids) {
$i = 0;
foreach ($stock as &$item) {
$delta = $item - $afschrijving;
$item = array($id[$i++], $delta > 0 ? $delta : 0);
$afschrijving = $delta < 0 ? abs($delta) : 0;
}
return $stock;
};
print_r($newStock($items, $stockRows, $ids));