respect-validation/docs/validators/Length.md

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

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See also:

• All
• Between
• BetweenExclusive
• Each
• GreaterThan
• GreaterThanOrEqual
• LessThan
• LessThanOrEqual
• Max
• Min