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run code in 150+ php & hhvm versions
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<?php $filterKeys = array( 'ticket', 'password', 'pass_word', 'passcode', 'pass_code', 'paypassword', 'pay_password' ); $key = 0; var_dump($key, $filterKeys, in_array($key, $filterKeys, true), array_search($key, $filterKeys)); exit();
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
int(0) array(7) { [0]=> string(6) "ticket" [1]=> string(8) "password" [2]=> string(9) "pass_word" [3]=> string(8) "passcode" [4]=> string(9) "pass_code" [5]=> string(11) "paypassword" [6]=> string(12) "pay_password" } bool(false) int(0)