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run code in 200+ php & hhvm versions
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<?php $array = array(1, 9, 4, 2, 5, 8); asort($array); print_r($array);
Output for 4.3.0 - 7.1.7
Array ( [0] => 1 [3] => 2 [2] => 4 [4] => 5 [5] => 8 [1] => 9 )