- print_r: documentation ( source)
- usort: documentation ( source)
<?php
$inventory = [
['type' => 'fruit', 'price' => 3.50],
['type' => 'milk', 'price' => 2.90],
['type' => 'pork', 'price' => 5.43],
];
usort(
$inventory,
fn(array $a, array $b): int => $b['price'] <=> $a['price']
);
print_r($inventory);