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run code in 150+ php & hhvm versions
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<?php $bla = array(); $bla[true] = '5.4.3'; $bla[false] = '3.0.8'; var_dump($bla);
Output for 4.3.0 - 5.6.26, hhvm-3.10.0 - 3.13.2, 7.0.0 - 7.1.0
array(2) { [1]=> string(5) "5.4.3" [0]=> string(5) "3.0.8" }