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The valid ISBN 10 "3899930169" does not pass validation->isbn() nor validation->isbn10() https://isbnsearch.org/isbn/3899930169

mathiasstocker

I tried several invalid ISBNs, but all pass the validation in v3.0.3. ```php $isbn = new \Isbn\Isbn(); var_dump($isbn->validation->isbn('7640108702869')); var_dump($isbn->validation->isbn('5055300330994')); var_dump($isbn->validation->isbn('5017239196706')); var_dump($isbn->validation->isbn('0090204645565')); var_dump($isbn->validation->isbn('4013594529877')); ``` show 5x true.

korzo

Validate ISBN with EAN-2 or EAN-5 add-on.

4

ISBN supports a 2 or 5 digit add-on, example: 978-1-873671-00-9 54499  Can you improve your library to validate this? Thanks. Source: - https://github.com/bwipp/postscriptbarcode/wiki/ISBN - https://github.com/bwipp/postscriptbarcode/wiki/EAN-2 - https://github.com/bwipp/postscriptbarcode/wiki/EAN-5

dac514