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run code in 150+ php & hhvm versions
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<?php $obj = new stdClass(); $obj->foo = "bar"; $obj->{'foo bar'} = 42; var_dump($obj);
Output for 5.0.0 - 7.1.0
object(stdClass)#1 (2) { ["foo"]=> string(3) "bar" ["foo bar"]=> int(42) }
Output for 4.3.0 - 4.4.9
object(stdClass)(2) { ["foo"]=> string(3) "bar" ["foo bar"]=> int(42) }