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<?php |
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declare(strict_types=1); |
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namespace drupol\BelgianNationalNumberFaker\Validator; |
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use const FILTER_SANITIZE_NUMBER_INT; |
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/** |
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* Class BelgianNationalNumberValidator. |
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*/ |
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final class BelgianNationalNumberValidator |
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{ |
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/** |
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* Validates a Belgian identification number. |
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* |
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* @param string $id |
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* The number. |
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* |
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* @return bool |
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* True if valid, false otherwise. |
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*/ |
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public static function isValid(string $id): bool |
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{ |
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return self::isValidNationalNumber($id); |
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} |
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/** |
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* Check if the number is a valid national number. |
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* |
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* @param string $national_number |
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* The number. |
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* |
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* @return bool |
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* True if validated, false otherwise. |
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*/ |
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private static function isValidNationalNumber(string $national_number): bool |
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{ |
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$national_number = filter_var($national_number, FILTER_SANITIZE_NUMBER_INT); |
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if (false === $national_number) { |
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return false; |
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} |
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$allowedCharactersPattern = '/^[0-9\\ \\-]+$/'; |
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$nonNumericPattern = '/\\D/'; |
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if (1 !== preg_match($allowedCharactersPattern, $national_number)) { |
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return false; |
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} |
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$national_number = preg_replace($nonNumericPattern, '', $national_number); |
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if (null === $national_number) { |
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return false; |
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} |
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if (11 !== mb_strlen($national_number)) { |
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return false; |
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} |
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$birthDatePart = (int) mb_substr($national_number, 0, 6); |
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$counterPart = (int) mb_substr($national_number, 6, 3); |
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$controlPart = (int) mb_substr($national_number, 9, 2); |
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// 1. CONTROL NUMBER CHECKING |
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$born2kOrLater = false; |
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$calculatedControl = 97 - (($birthDatePart . $counterPart) % 97); |
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if ($calculatedControl !== $controlPart) { |
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$born2kOrLater = true; |
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$calculatedControl = 97 - (('2' . $birthDatePart . $counterPart) % 97); |
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if ($calculatedControl !== $controlPart) { |
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return false; |
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} |
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} |
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// 2. BIRTHDATE CHECKING |
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$birthDate = true === $born2kOrLater ? |
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'20' . $birthDatePart : |
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'19' . $birthDatePart; |
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$checkdate = checkdate( |
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(int) mb_substr($birthDate, 4, 2), |
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(int) mb_substr($birthDate, 6, 2), |
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(int) mb_substr($birthDate, 0, 4) |
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); |
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if (false === $checkdate) { |
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return false; |
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} |
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// 3. COUNTER CHECKING |
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if (1 > $counterPart || 997 < $counterPart) { |
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return false; |
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} |
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return true; |
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} |
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} |
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drupol /
belgian-national-number-faker
