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respect-validation/docs/validators/Isbn.md
Alexandre Gomes Gaigalas 16148e9593 Standardize and improve validation message templates 
- Remove redundant "valid" prefix:
   Date, DateTime, DateTimeDiff, Domain, Email, Iban, Imei, Ip, Isbn, Json, LanguageCode, LeapDate, LeapYear, Luhn, MacAddress, NfeAccessKey, Nif, Nip, Pesel, Phone, Pis, PolishIdCard, PostalCode, Roman, Slug, Tld, Url, Uuid, Version.

 - Remove redundant "value" suffix
   ArrayVal, BoolVal, Countable, FloatVal, IntVal, IterableVal, NumericVal, ScalarVal, StringVal.

 - Standardize "consist only of" phrasing
   Alnum, Alpha, Cntrl, Consonant, Digit, Graph, Lowercase, Printable, Punct, Space, Spaced, Uppercase, Vowel, Xdigit.

 - Improve file accessibility messages
   Directory, Executable, File, Image, Readable, SymbolicLink, Writable.

 - Improve grammar and article usage
   CreditCard, Extension, Mimetype, Regex, Size.
2026-02-03 19:58:55 +00:00

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Isbn

  • Isbn()

Validates whether the input is a valid ISBN or not.

v::isbn()->assert('ISBN-13: 978-0-596-52068-7');
// Validation passes successfully

v::isbn()->assert('978 0 596 52068 7');
// Validation passes successfully

v::isbn()->assert('ISBN-12: 978-0-596-52068-7');
// → "ISBN-12: 978-0-596-52068-7" must be an ISBN

v::isbn()->assert('978 10 596 52068 7');
// → "978 10 596 52068 7" must be an ISBN

Templates

Isbn::TEMPLATE_STANDARD

Mode Template
default {{subject}} must be an ISBN
inverted {{subject}} must not be an ISBN

Template placeholders

Placeholder Description
subject The validated input or the custom validator name (if specified).

Categorization

  • Identifications

Changelog

Version Description
3.0.0 Templates changed
2.0.0 Created

See Also