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<?php $array = array(true=>'true',false=>'false'); var_dump($array);
Output for 4.3.2 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
array(2) { [1]=> string(4) "true" [0]=> string(5) "false" }
Output for 4.3.0 - 4.3.1
array(0) { }