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<?php $a=[1, 4, 5, 3, 2]; usort($a, function($a, $b) { return $a > $b ? 1 : 0; }); print_r($a);
based on NADgi
Output for 7.3.0 - 7.3.27, 7.4.0 - 7.4.16, 8.0.0 - 8.0.3
Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 )