3v4l.org

run code in 500+ PHP versions simultaneously
<?php $arr = [1, 2, -2]; usort($arr, fn ($a, $b) => $a - $b); print_r($arr); $arr = [0.1, 0.2, -0.2]; usort($arr, fn ($a, $b) => $a - $b); print_r($arr);

preferences:
23.45 ms | 475 KiB | 4 Q