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respect-validation/docs/validators/Length.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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Length

  • Length(Validator $validator)

Validates the length of the given input against a given validator.

v::length(v::between(1, 5))->assert('abc');
// Validation passes successfully

v::length(v::greaterThan(5))->assert('abcdef');
// Validation passes successfully

v::length(v::lessThan(5))->assert('abc');
// Validation passes successfully

This validator can be used to validate the length of strings, arrays, and objects that implement the Countable interface.

v::length(v::greaterThanOrEqual(3))->assert([1, 2, 3]);
// Validation passes successfully

v::length(v::equals(0))->assert(new SplPriorityQueue());
// Validation passes successfully

Templates

Length::TEMPLATE_STANDARD

Used when it's possible to get the length of the input.

Mode Template
default The length of
inverted The length of

Length::TEMPLATE_WRONG_TYPE

Mode Template
default {{subject}} must be countable or a string
inverted {{subject}} must not be countable or a string

Template as prefix

The template serves as a prefix to the template of the inner validator.

v::length(v::equals(3))->assert('tulip');
// → The length of "tulip" must be equal to 3

v::not(v::length(v::equals(4)))->assert('rose');
// → The length of "rose" must not be equal to 4

Length::TEMPLATE_WRONG_TYPE

Used when it's impossible to get the length of the input.

Mode Template
default {{subject}} must be a countable value or a string
inverted {{subject}} must not be a countable value or a string

Template placeholders

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

Categorization

  • Comparisons
  • Transformations

Changelog

Version Description
3.0.0 Became a transformation
0.3.9 Created

See Also