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<?php $array = array("DE", "GB"); $array['DE'] = array(); array_push($array['DE'], "Rhapsody"); var_dump($array); ?>
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
array(3) { [0]=> string(2) "DE" [1]=> string(2) "GB" ["DE"]=> array(1) { [0]=> string(8) "Rhapsody" } }
Output for hhvm-3.10.0

Process exited with code 153.