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run code in 150+ php & hhvm versions
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<?php class A {} $a = new A; $a->x = 42; print_r($a);
Output for 5.0.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
A Object ( [x] => 42 )
Output for 4.3.0 - 4.4.9
a Object ( [x] => 42 )