2.3.0

This version introduces a new public API with seven new static methods:

• Isbn::validateAsIsbn10
• Isbn::validateAsIbsn13
• Isbn::validateAsEan13
• Isbn::convertToIsbn10
• Isbn::convertToIsbn13
• Isbn::convertToEan13
• Isbn::convertToGtin14

See README for details.

This version sets as deprecated four legacy methods:

• Isbn->isValid
• Isbn->getErrors
• Isbn->validate
• Isbn->format

These methods will trigger a deprecated notice when but will be supported until the next major (3.0) release.
See Methods deprecated in 2.3.0 on how to upgrade your existing implementation.

2.2.0

• Output can now be formatted as GTIN-14 identifier (thanks to @kokoshneta)
• ISBN ranges were updated

2.1.5

• Fix #23: Problem updating ranges (@S1SYPHOS)
• Update ISBN ranges

2.1.4

• Fix #22: Invalid ISBN is returned as valid
• Update ISBN ranges

2.1.3

• Fix #7: Undefined offset error when formatting a mexican ISBN
• Update ISBN ranges
• PHP 7.3 & 7.4 support

2.1.2

• Updated dependencies
• Updated ISBN ranges
• Improved docs (@Dispositif)
• Added late static bindings in Isbn class (@Dispositif)

2.1.1

• Upgrade dependencies
• Upgrade PHPUnit to 8.3

2.1.0

• Added a validate method that throws an Exception on ISBN validation errors
• Fixed #9: Improve error output
• Added composer scripts to run tests and update ranges in a Docker container
• Updated ISBN ranges

2.0.8

This library is now tested against PHP version 5.6, 7.0, 7.1 & 7.2

• Fixed #7: ISBNs with invalid product
  code or country code are considered valid
• Added PHP versions 7.1 & 7.2 to travis config file

2.0.7

• Attempts to format an invalid ISBN will now throw an Exception (fixes #7)
• Fixed considering ISBNs with an invalid product code as valid (fixes #7)
• Updated ISBN ranges