/**
* 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);
}
/**
* Validate ISBN-13 Format
*
* Used internally by IsbnValidator::validate() which performs
* string formatting before validating.
*
* @param string $isbn ISBN number to be validated
* @return Returns FALSE if the ISBN is not a valid number, otherwise
* returns the array set of number parts.
*/
private static function validateIsbn13($isbn)
{
$check = IsbnValidator::getCheckDigit($isbn, 13);
$remainder = $check % 10;
if ($remainder === 0) {
return self::getIsbnParts($isbn);
} else {
return false;
}
}