Understand PHP Code with AI

01 Read a small example

Keep the positive numbers.

Start with four numbers: −3, 0, 2 and 5. Keep each number greater than zero. The result contains 2 and 5, in the same order.

An authored PHP teaching snippet. Paste it into the workspace and select PHP to explore your own explanation.

positive.php

$numbers = [-3, 0, 2, 5];
$positive = array_values(array_filter(
    $numbers, fn($number) => $number > 0
));