- var_dump: documentation ( source)
- array_search: documentation ( source)
- in_array: documentation ( source)
<?php
$filterKeys = array(
'ticket',
'password',
'pass_word',
'passcode',
'pass_code',
'paypassword',
'pay_password'
);
$key = 0;
var_dump($key, $filterKeys, in_array($key, $filterKeys), array_search($key, $filterKeys)); exit();