/**
* Validate
*
* Determines if the UPC value is valid, IE the check digit
* matches.
*
* @param string $upc UPC to be inspected
* @throws UpcException If the UPC value is less than 6 digits or more than 12
* @return Returns TRUE if the UPC matches the UPC-E (GTIN12) standard,
* FALSE otherwise.
*/
public static function validate($upc)
{
$upc = trim($upc);
if (!is_numeric($upc)) {
throw new UpcException\UpcException('UPC Value can only contain numbers. UPC: ' . $upc, UpcException\UpcException::CODE_CONTAINS_CHARACTERS);
}
// Expand UPC
$upc = UpcEExpander::expand($upc);
$length = strlen($upc);
if (!$upc) {
return false;
}
$checkDigit = UpcEValidator::getCheckDigit($upc);
return intval($upc[$length - 1]) === intval($checkDigit);
}
/**
* checkCode
*
* Check Code will attempt to smartly detect the code type,
* IE UPC, EAN or ISBN10/13.
*
* Since most 13 DIGIT EAN's also validate as an ISBN, the type will be ISBN
* if the code validates as both.
*
* @param string $code Code to check.
* @return Returns an array with the code type, check digit and if
* the code is an ISBN, the ISBN parts. FALSE otherwise.
*/
public static function checkCode($code)
{
$isbn = array();
$upcValid = false;
$upcEValid = false;
$eanValid = false;
$isbnValid = false;
try {
$upcValid = ProductValidator::checkUpcA($code);
} catch (UpcException\UpcException $e) {
}
try {
$upcEValid = ProductValidator::checkUpcE($code);
} catch (UpcException\UpcException $e) {
}
try {
$eanValid = ProductValidator::checkEan($code);
} catch (EanException\EanException $e) {
}
try {
$isbnValid = ProductValidator::checkIsbn($code, $isbn);
} catch (IsbnException\IsbnException $e) {
}
$type = '';
$checkDigit = 0;
// UPC Code
if ($upcValid) {
$type = 'UPC-A';
$checkDigit = UpcValidator\UpcValidator::getCheckDigit($code);
} else {
if ($upcEValid) {
$type = 'UPC-E - ' . strlen($code);
$code = UpcEValidator\UpcEExpander::expand($code);
$checkDigit = UpcEValidator\UpcEValidator::getCheckDigit($code);
} else {
if ($eanValid) {
$type = 'EAN';
$checkDigit = EanValidator\EanValidator::getCheckDigit($code);
} else {
if ($isbnValid && !$eanValid) {
$type = 'ISBN';
$checkDigit = IsbnValidator\IsbnValidator::getCheckDigit($code);
} else {
return false;
}
}
}
}
// Return array of values
return array('type' => $type, 'checkDigit' => $checkDigit, 'isbn' => $isbn);
}