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run code in 300+ PHP versions simultaneously
<?php $array=Array ( '0' => 2, '1' => 1, '2' => 3, '3' => 5, '4' => 1, '5' => 2, '6' => 1, '7' => 4, '8' => 2 ); print_r(array_reverse(array_unique(array_reverse($array))));

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