PHP Arrays looping and creating multi dimensional arrays - php

Question

I have an array of items listed bellow
array (
[0] => array(
'order' => 'order001',
'qty' => 90
),
[1] => array(
'order' => 'order002',
'qty' => 100
)
)
I also have a quantity(Q) that is to be fetched from the list above and the array have to be looped from top to bottom without even skipping a single item.
The loop will go through the first item to see if it can get the total requested and if the first loop cant meet the total then the it will return the total(T) got from the first item store it somewhere and then move to the next item in the array with a new value which lets say its (Q-T) and see if can find the quantity in the next item.
Now the problem is i cant actually figure out how to make hold and return the array as a list like in the case below.
Lets say i need a total of 120.
Array(
Array(
'order' => 'order001',
'qty' => 90
),
Array(
'order' => 'order002',
'qty' => 30
)
);

Answer 1

Maybe something like this?
https://iconoun.com/demo/temp_tonywiz.php
<?php // demo/temp_tonywiz.php
/**
* Working with arrays
*
* https://stackoverflow.com/questions/45264342/php-arrays-looping-and-creating-multi-dimensional-arrays
*/
error_reporting(E_ALL);
echo '<pre>';
$qty = 120;
$arr = [ ['order' => 'order001', 'qty' => 90], ['order' => 'order002', 'qty' => 100] ];
$out = [];
foreach ($arr as $sub)
{
if ($qty <= 0) break;
if ($sub['qty'] <= $qty)
{
$out[] = $sub;
$qty = $qty - $sub['qty'];
}
else
{
$sub['qty'] = $qty;
$out[] = $sub;
}
}
print_r($arr);
print_r($out);