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run code in 200+ php & hhvm versions
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<?php $obj = new StdClass; $obj->v1 = true; $obj->v2 = true; foreach ($obj as $v) { $v = false; } var_dump($obj);
Output for 5.0.0 - 7.2.0
object(stdClass)#1 (2) { ["v1"]=> bool(true) ["v2"]=> bool(true) }
Output for 4.3.0 - 4.4.9
object(stdClass)(2) { ["v1"]=> bool(true) ["v2"]=> bool(true) }