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@ 2015-05-06T10:21:24Z

<?php

$a = '6';
$b = array(
            6 => 'CARD online',
            9 => 'CardAvantaj online',
            10 => 'BonusCard online',
            11 => 'CardRaiffeisen online',
            12 => 'CardTransilvania online',
            13 => 'CardEurolineAmericanExpress online',
            16 => 'ePay',
            19 => 'iTransfer'
        );
       echo +in_array($a, array_keys($b));

Output
Performance
VLD
References
Branches

in_array: documentation ( source)
array_keys: documentation ( source)

preferences:dark modelive preview

35.16 ms | 402 KiB | 5 Q