IsoCodes\Abn

Complexity

Total Complexity

4

Size/Duplication

Total Lines	27
Duplicated Lines	0 %

Coupling/Cohesion

Components	0
Dependencies	1

Importance

Changes

0

1 Method

Rating	Name	Duplication	Size	Complexity
A	validate()	0	18	4

<?php

namespace IsoCodes;

/**
 * Class Abn, Australian Business Number
 *
 * @link https://en.wikipedia.org/wiki/Australian_Business_Number
 * @link https://abr.business.gov.au/
 */
class Abn implements IsoCodeInterface
{
    /**
     * Validate an Australian Business Number (ABN)
     * @author Paul Ferrett, 2009 (http://www.paulferrett.com)
     * @param string $abn
     * @return bool
     */
    public static function validate($abn)
    {
        $weights = [10, 1, 3, 5, 7, 9, 11, 13, 15, 17, 19];
        $sum = 0;
        $abn = preg_replace('/[^0-9]/', '', $abn);
        $abn = Utils::unDecorate($abn, [' ']);
        if (mb_strlen($abn) !== 11) {
            return false;
        }
        $abn[0] = ((int)$abn[0] - 1); // Subtract one from first digit
        foreach (str_split($abn) as $key => $digit) {
            $sum += ($digit * $weights[$key]);
        }
        if (($sum % 89) != 0) {
            return false;
        }
        return true;
    }
}