ترتيب مصفوفة بإستخدام usort

<?php

$numbers = [30, 5, 10];
usort($numbers, fn ($a, $b) => $a <=> $b);
echo json_encode($numbers);

[5,10,30]

<?php

$users = [["name" => "Osama", "score" => 80], ["name" => "Mona", "score" => 95]];
usort($users, fn ($a, $b) => $b["score"] <=> $a["score"]);
echo json_encode(array_column($users, "name"));

["Mona","Osama"]