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<?php $queue = array("orange","banana"); array_unshift($queue,"apple","raspberry"); print_r($queue); ?>
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Array ( [0] => apple [1] => raspberry [2] => orange [3] => banana )