<?php $array = range(0, 10); usort($array, withBool(...)); print(implode(', ', $array)).PHP_EOL; // 9, 10, 7, 8, 5, 6, 4, 3, 2, 1, 0 usort($array, withInt(...)); print(implode(', ', $array)).PHP_EOL; // 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 function withBool($a, $b) : bool { return $a <=> $b; } function withInt($a, $b) : int { return $a <=> $b; } ?>
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