<?php $array = array ( 'key-0' => 40, 'key-1' => 50, 'key-2' => 10, 'key-3' => 20, 'key-4' => 20, 'key-5' => 30, 'key-6' => 10, 'key-7' => 20, 'key-8' => 40, 'key-9' => 40, ); uasort($array, fn($a, $b) => $a <=> $b); var_export($array);
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