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run code in 200+ php & hhvm versions
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<?php $o = new \stdClass(); $o->foo = 'bar'; var_dump($o); $a = ['foo' => 'Hello']; var_dump($a);
based on nPuQi
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.2.0
object(stdClass)#1 (1) { ["foo"]=> string(3) "bar" } array(1) { ["foo"]=> string(5) "Hello" }