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run code in 150+ php & hhvm versions
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<?php $a = null; $entity = (object)$a; $entity->a = 'test'; var_dump($entity);
Output for 5.0.0 - 7.1.0
object(stdClass)#1 (1) { ["a"]=> string(4) "test" }
Output for 4.3.0 - 4.4.9
object(stdClass)(1) { ["a"]=> string(4) "test" }