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run code in 200+ php & hhvm versions
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<?php class A{} $a = new A; $a->b='c'; $a->d = 'e'; var_dump((array)$a);
Output for 5.6.0 - 5.6.30, hhvm-3.18.5 - 3.22.0, 7.0.0 - 7.3.0beta1
array(2) { ["b"]=> string(1) "c" ["d"]=> string(1) "e" }