This package provides data validation capabilities.

• Validates any data: arrays, objects, scalar values, etc.
• Supports custom data sets.
• Handles nested data structures (one-to-one and one-to-many).
• Can read validation rules from PHP 8 attributes.
• Error message formatting and translation.
• Attribute names translation.
• Conditional validation:
  • Skip validation of "empty" value with possibility to configure "empty" condition.
  • Skip further validation if an error occurred for the same attribute.
  • Skip validation depending on a condition.
• Possibility to use context in rule handler.
• Common rules bundled.
• Supports DI container for creating custom rule handlers with extra dependencies.
• Exporting rules options for using in the frontend.

• PHP 8.0 or higher.
• mbstring PHP extension.

The package could be installed with composer:

composer require yiisoft/validator

Validator allows to check data in any format. For example, when data is an object:

use Yiisoft\Validator\Rule\AtLeast;
use Yiisoft\Validator\Rule\Email;
use Yiisoft\Validator\Rule\Length;
use Yiisoft\Validator\Rule\Number;
use Yiisoft\Validator\Rule\Required;
use Yiisoft\Validator\Validator;

#[AtLeast(['email', 'phone'])]
final class Person
{
    public function __construct(
        #[Required]
        #[Length(min: 2)]
        public ?string $name = null,

        #[Number(min: 21)]
        public ?int $age = null,

        #[Email]
        public ?string $email = null,

        public ?string $phone = null,
    ) {
    }
}

$person = new Person(
    name: 'John', 
    age: 17, 
    email: '[email protected]',
    phone: null
);

$result = (new Validator())->validate($person);

The validation result is an object that allows to check whether validation was successful:

$result->isValid();

It also contains errors occurred during validation:

$result->getErrorMessages();

• Guide
• Internals

The Yii Validator is free software. It is released under the terms of the BSD License. Please see LICENSE for more information.

Maintained by Yii Software.