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run code in 150+ php & hhvm versions
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<?php $data = (object) null; $data->theme = 'zero'; var_dump($data);
Output for 5.0.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
object(stdClass)#1 (1) { ["theme"]=> string(4) "zero" }
Output for 4.3.0 - 4.4.9
object(stdClass)(1) { ["theme"]=> string(4) "zero" }