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run code in 150+ php & hhvm versions
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<?php $A = array(1, 1, 2, 4, 6, 7, 7, 7, 13); $dupes_array = array_values(array_unique($A)); print_r($dupes_array);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Array ( [0] => 1 [1] => 2 [2] => 4 [3] => 6 [4] => 7 [5] => 13 )