- return array(
- array( '978-0-300-14424-6', true ),
- array( '0-14-020652-3', true ),
- array( '020652-3', false ),
- array( '9781234567897', true ),
- array( '1-4133-0454-0', true ),
- array( '978-1413304541', true ),
- array( '0136091814', true ),
- array( '0136091812', false ),
- array( '9780136091813', true ),
- array( '9780136091817', false ),
- array( '123456789X', true ),
+ return [
+ [ '978-0-300-14424-6', true ],
+ [ '0-14-020652-3', true ],
+ [ '020652-3', false ],
+ [ '9781234567897', true ],
+ [ '1-4133-0454-0', true ],
+ [ '978-1413304541', true ],
+ [ '0136091814', true ],
+ [ '0136091812', false ],
+ [ '9780136091813', true ],
+ [ '9780136091817', false ],
+ [ '123456789X', true ],