byrokrat\id\Helper\Modulo10::calculateCheckDigit()

Complexity

Conditions	5
Paths	10

Size

Total Lines

19

Duplication

Lines	0
Ratio	0 %

Importance

Changes

0

<?php
    private static function calculateCheckDigit(string $number): string
    {
        $weight = 2;
        $sum = 0;

        for ($pos = strlen($number) - 1; $pos >= 0; $pos--) {
            $tmp = (int)$number[$pos] * $weight;
            $sum += ($tmp > 9) ? (1 + ($tmp % 10)) : $tmp;
            $weight = ($weight == 2) ? 1 : 2;
        }

        $ceil = $sum;

        while ($ceil % 10 != 0) {
            $ceil++;
        }

        return (string)($ceil - $sum);
    }
}