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run code in 150+ php & hhvm versions
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<?php $array = array(0 => 'blue', 1 => 'red', 2 => 'green', 3 => 'red', 5 => 'green'); print_r($array);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Array ( [0] => blue [1] => red [2] => green [3] => red [5] => green )