mirror of https://github.com/Respect/Validation.git synced 2026-03-18 08:09:51 +01:00

Henrique Moody d38736d167

Add doc linter to check validator constructors

When we make changes to the code, renaming variables, or adding
parameters to a validator, it's easy to forget to update the
documentation.

With this change, we avoid having a disparity between the documentation
and the code.

2026-01-13 23:37:05 -07:00

2.1 KiB

Raw Blame History

KeyOptional

KeyOptional(string|int $key, Validator $validator)

Validates the value of an array against a given validator when the key exists.

v::keyOptional('name', v::stringType())->isValid([]); // true
v::keyOptional('name', v::stringType())->isValid(['name' => 'The Respect Panda']); // true

v::keyOptional('email', v::email())->isValid([]); // true
v::keyOptional('email', v::email())->isValid(['email' => 'therespectpanda@gmail.com']); // true

v::keyOptional('age', v::intVal())->isValid(['age' => 'Twenty-Five']); // false

The name of this validator is automatically set to the key name.

v::keyOptional('age', v::intVal())->assert(['age' => 'Twenty-Five']);
// message: age must be an integer number

Note

This validator will pass for anything that is not an array because it will always pass when it doesn't find a key. If you want to ensure the input is an array, use ArrayType with it.

v::arrayType()->keyOptional('phone', v::phone())->assert('This is not an array');
// message: "This is not an array" must be of type array

Below are some other validators that are tightly related to KeyOptional:

To validate if a key exists, use KeyExists instead.
To validate an array against a given validator requiring the key to exist, use Key instead.

Templates

Template placeholders

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

Categorization

Arrays
Structures

Changelog

Version	Description
3.0.0	Created from Key

2.1 KiB Raw Blame History