IsoCodes\Iban::validate()

Complexity

Conditions	4
Paths	4

Size

Total Lines	97
Code Lines	82

Duplication

Lines	0
Ratio	0 %

Importance

Changes	4
Bugs	0	Features	0

<?php
    public static function validate($iban)
    {
        // Per country validation rules
        static $rules = array(
            'AL' => '[0-9]{8}[0-9A-Z]{16}',
            'AD' => '[0-9]{8}[0-9A-Z]{12}',
            'AT' => '[0-9]{16}',
            'BE' => '[0-9]{12}',
            'BA' => '[0-9]{16}',
            'BG' => '[A-Z]{4}[0-9]{6}[0-9A-Z]{8}',
            'HR' => '[0-9]{17}',
            'CY' => '[0-9]{8}[0-9A-Z]{16}',
            'CZ' => '[0-9]{20}',
            'DK' => '[0-9]{14}',
            'EE' => '[0-9]{16}',
            'FO' => '[0-9]{14}',
            'FI' => '[0-9]{14}',
            'FR' => '[0-9]{10}[0-9A-Z]{11}[0-9]{2}',
            'PF' => '[0-9]{10}[0-9A-Z]{11}[0-9]{2}', // French Polynesia
            'TF' => '[0-9]{10}[0-9A-Z]{11}[0-9]{2}', // French Southern Territories
            'GP' => '[0-9]{10}[0-9A-Z]{11}[0-9]{2}', // French Guadeloupe
            'MQ' => '[0-9]{10}[0-9A-Z]{11}[0-9]{2}', // French Martinique
            'YT' => '[0-9]{10}[0-9A-Z]{11}[0-9]{2}', // French Mayotte
            'NC' => '[0-9]{10}[0-9A-Z]{11}[0-9]{2}', // New Caledonia
            'RE' => '[0-9]{10}[0-9A-Z]{11}[0-9]{2}', // French Reunion
            'BL' => '[0-9]{10}[0-9A-Z]{11}[0-9]{2}', // French Saint Barthelemy
            'MF' => '[0-9]{10}[0-9A-Z]{11}[0-9]{2}', // French Saint Martin
            'PM' => '[0-9]{10}[0-9A-Z]{11}[0-9]{2}', // Saint Pierre et Miquelon
            'WF' => '[0-9]{10}[0-9A-Z]{11}[0-9]{2}', // Wallis and Futuna Islands
            'GE' => '[0-9A-Z]{2}[0-9]{16}',
            'DE' => '[0-9]{18}',
            'GI' => '[A-Z]{4}[0-9A-Z]{15}',
            'GR' => '[0-9]{7}[0-9A-Z]{16}',
            'GL' => '[0-9]{14}',
            'HU' => '[0-9]{24}',
            'IS' => '[0-9]{22}',
            'IE' => '[0-9A-Z]{4}[0-9]{14}',
            'IL' => '[0-9]{19}',
            'IT' => '[A-Z][0-9]{10}[0-9A-Z]{12}',
            'KZ' => '[0-9]{3}[0-9A-Z]{3}[0-9]{10}',
            'KW' => '[A-Z]{4}[0-9]{22}',
            'LV' => '[A-Z]{4}[0-9A-Z]{13}',
            'LB' => '[0-9]{4}[0-9A-Z]{20}',
            'LI' => '[0-9]{5}[0-9A-Z]{12}',
            'LT' => '[0-9]{16}',
            'LU' => '[0-9]{3}[0-9A-Z]{13}',
            'MK' => '[0-9]{3}[0-9A-Z]{10}[0-9]{2}',
            'MT' => '[A-Z]{4}[0-9]{5}[0-9A-Z]{18}',
            'MR' => '[0-9]{23}',
            'MU' => '[A-Z]{4}[0-9]{19}[A-Z]{3}',
            'MC' => '[0-9]{10}[0-9A-Z]{11}[0-9]{2}',
            'ME' => '[0-9]{18}',
            'NL' => '[A-Z]{4}[0-9]{10}',
            'NO' => '[0-9]{11}',
            'PL' => '[0-9]{24}',
            'PT' => '[0-9]{21}',
            'RO' => '[A-Z]{4}[0-9A-Z]{16}',
            'SM' => '[A-Z][0-9]{10}[0-9A-Z]{12}',
            'SA' => '[0-9]{2}[0-9A-Z]{18}',
            'RS' => '[0-9]{18}',
            'SK' => '[0-9]{20}',
            'SI' => '[0-9]{15}',
            'ES' => '[0-9]{20}',
            'SE' => '[0-9]{20}',
            'CH' => '[0-9]{5}[0-9A-Z]{12}',
            'TN' => '[0-9]{20}',
            'TR' => '[0-9]{5}[0-9A-Z]{17}',
            'AE' => '[0-9]{19}',
            'GB' => '[A-Z]{4}[0-9]{14}',
            'CI' => '[0-9A-Z]{2}[0-9]{22}',
        );
        // Min length check
        if (mb_strlen($iban) < 15) {
            return false;
        }
        // Fetch country code from IBAN
        $ctr = substr($iban, 0, 2);
        if (isset($rules[$ctr]) === false) {
            return false;
        }
        // Fetch country validation rule
        $check = substr($iban, 4);
        if (preg_match('~^'.$rules[$ctr].'$~', $check) !== 1) {
            return false;
        }
        // Fetch needed string for validation
        $check = $check.substr($iban, 0, 4);
        // Replace characters by decimal values
        $check = str_replace(
            array('A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'),
            array('10', '11', '12', '13', '14', '15', '16', '17', '18', '19', '20', '21', '22', '23', '24', '25', '26', '27', '28', '29', '30', '31', '32', '33', '34', '35'),
            $check
        );

        // Final check
        return bcmod($check, 97) === '1';
    }
}