Iamfarhad\Validation\Rules\CardNumber::rule()

Complexity

Conditions	5
Paths	6

Size

Total Lines	14
Code Lines	9

Duplication

Lines	0
Ratio	0 %

Importance

Changes	1
Bugs	0	Features	1

<?php
    public function rule($attribute, $value, $parameters, $validator): bool
    {
        if (! preg_match('/^\d{16}$/', $value)) {
            return false;
        }
        $sum = 0;
        for ($position = 1; $position <= 16; $position++) {
            $temp = $value[$position - 1];
            $temp = $position % 2 === 0 ? $temp : $temp * 2;
            $temp = $temp > 9 ? $temp - 9 : $temp;
            $sum += $temp;
        }

        return (bool) ($sum % 10 === 0);
    }