تجميع عناصر المصفوفة بإستخدام array_reduce

<?php

$numbers = [10, 20, 30];
$total = array_reduce($numbers, fn ($sum, $number) => $sum + $number, 0);
echo $total;

60

<?php

$items = [["quantity" => 2], ["quantity" => 3]];
echo array_reduce($items, fn ($total, $item) => $total + $item["quantity"], 0);

5