Erkan IŞIK
23 lines
475 B
PHP
23 lines
475 B
PHP
<?php namespace ZN\Validation\CreditCard;
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/**
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* ZN PHP Web Framework
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*
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* "Simplicity is the ultimate sophistication." ~ Da Vinci
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*
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* @package ZN
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* @license MIT [http://opensource.org/licenses/MIT]
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* @author Ozan UYKUN [ozan@znframework.com]
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*/
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interface LuhnAlgorithmInterface
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{
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/**
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* Protected luhn algorithm check
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*
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* @param string $number
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*
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* @return string
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*/
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public static function check(?string $number = NULL);
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}
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