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26 lines
541 B
Markdown
26 lines
541 B
Markdown
# Isbn
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- `v::isbn()`
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Validates whether the input is a valid [ISBN][] or not.
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```php
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v::isbn()->validate('ISBN-13: 978-0-596-52068-7'); // true
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v::isbn()->validate('978 0 596 52068 7'); // true
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v::isbn()->validate('ISBN-12: 978-0-596-52068-7'); // false
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v::isbn()->validate('978 10 596 52068 7'); // false
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```
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## Changelog
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Version | Description
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--------|-------------
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2.0.0 | Created
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***
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See also:
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- [Imei](Imei.md)
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- [Luhn](Luhn.md)
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[ISBN]: https://www.isbn-international.org/content/what-isbn "International Standard Book Number"
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