<?php

$numbers = [1, 2, 3, 4, 5];
$numbers2 = [1, 2, 3, 4, 5];

// array_map
$doubled = array_map(fn($n) => $n * 2, $numbers);

// array_map, passing multiple arrays
$x = array_map(fn($a, $b) => $a * $b, $numbers, $numbers2);

// array_filter
$odd = array_filter($numbers, fn($n) => $n % 2);

// array_reduce
$product = array_reduce($numbers, fn($a, $n) => $a * $n, 1);

print_r($doubled);
print_r($x);
print_r($odd);
print_r($product);