symfony/symfony — pull request #6718 by thewholelifetolearn (2013-01-12 19:55:09+00:00)
Title: [Validator] Added ISBN validator

Bug fix: no
Feature addition: yes
Backwards compatibility break: no
License of the code: MIT

For information about ISBN-10 and ISBN13: https://en.wikipedia.org/wiki/Isbn

This constraint permits to valid a ISBN-10 code, a ISBN-13 code or both on a value