Exemplo n.º 1
0
 /**
  * Validates the checksum
  *
  * @param  string $value The barcode to check the checksum for
  * @return boolean
  */
 public function checksum($value)
 {
     if (strlen($value) == 8) {
         $this->_checksum = '_issn';
     } else {
         $this->_checksum = '_gtin';
     }
     return parent::checksum($value);
 }