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run code in 150+ php & hhvm versions
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<?php $array = array("hi" => "Ali", "You" => "Ali", "C" => "APPLE"); $result = array_unique($array); print_r($result); foreach($result as $user) { echo $user . "_"; } ?>
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
Array ( [hi] => Ali [C] => APPLE ) Ali_APPLE_
Output for hhvm-3.10.0

Process exited with code 153.