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<?php $o = null; $monObjet = (object)$o; $monObjet->test = 1; var_dump($monObjet);
Output for 5.0.0 - 7.1.0
object(stdClass)#1 (1) { ["test"]=> int(1) }
Output for 4.3.0 - 4.4.9
object(stdClass)(1) { ["test"]=> int(1) }