/**
* Check ISBN Code
*
* @param string $code ISBN Code to validate
* @param array &$isbn Reference Array to fill with ISBN info
* @return Returns TRUE if the ISBN validates, otherwise FALSE
*/
public static function checkIsbn($code, &$isbn)
{
return IsbnValidator\IsbnValidator::validate($code, $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;
}
}
