IsoCodes\CreditCard::validate()

Complexity

Conditions	5
Paths	5

Size

Total Lines	25
Code Lines	13

Duplication

Lines	0
Ratio	0 %

Importance

Changes	3
Bugs	1	Features	0

<?php
    public static function validate($creditCard)
    {
        if (trim($creditCard) === '') {
            return false;
        }

        //longueur de la chaine $creditCard
        $length = strlen($creditCard);

        //resultat de l'addition de tous les chiffres
        $tot = 0;
        for ($i = $length - 1; $i >= 0; --$i) {
            $digit = substr($creditCard, $i, 1);

            if ((($length - $i) % 2) == 0) {
                $digit = $digit * 2;
                if ($digit > 9) {
                    $digit = $digit - 9;
                }
            }
            $tot += (int) $digit;
        }

        return ($tot % 10) == 0;
    }
}