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run code in 150+ php & hhvm versions
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<?php $arrValue = array('first', 'second'); $ret = in_array(0, $arrValue); var_dump($ret); var_dump($arrValue); ;
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
bool(true) array(2) { [0]=> string(5) "first" [1]=> string(6) "second" }