?@[\\]^_`{|}~\''; /** * Checksum function * @var string */ protected $_checksum = '_code128'; /** * Constructor * * Sets check flag to false. * * @return void */ public function __construct() { $this->setCheck(false); } /** * Validates the checksum (Modulo CK) * * @param string $value The barcode to validate * @return boolean */ protected function _code128($value) { return true; } }