array_filter()
function
Filters array elements using a callback. Without callback, removes all falsy values (0, "", null, false).
Syntax
array_filter(array $array, ?callable $callback = null): array
Example
php
<?php
$nums = [1, 2, 3, 4, 5, 6];
$evens = array_filter($nums, fn($n) => $n % 2 === 0);
print_r(array_values($evens)); // [2, 4, 6]
$clean = array_filter([0, 1, '', 'hi', null, false, true]);
print_r(array_values($clean)); // [1, 'hi', true]