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Validator Component

This component is based on the JSR-303 Bean Validation specification and enables specifying validation rules for classes using XML, YAML or annotations, which can then be checked against instances of these classes.

use Symfony\Component\Validator\Validator;
use Symfony\Component\Validator\Mapping\ClassMetadataFactory;
use Symfony\Component\Validator\Mapping\Loader\StaticMethodLoader;
use Symfony\Component\Validator\Constraints as Assert;
use Symfony\Component\Validator\ConstraintValidatorFactory;

$validator = new Validator(
    new ClassMetadataFactory(new StaticMethodLoader()),
    new ConstraintValidatorFactory()
);

$constraint = new Assert\Collection(array(
    'name' => new Assert\Collection(array(
        'first_name' => new Assert\MinLength(101),
        'last_name'  => new Assert\MinLength(1),
    )),
    'email'    => new Assert\Email(),
    'simple'   => new Assert\MinLength(102),
    'gender'   => new Assert\Choice(array(3, 4)),
    'file'     => new Assert\File(),
    'password' => new Assert\MinLength(60),
));

$violations = $validator->validateValue($input, $constraint);

Resources

Silex integration:

https://github.com/fabpot/Silex/blob/master/src/Silex/Provider/ValidatorServiceProvider.php

Unit tests:

https://github.com/symfony/symfony/tree/master/tests/Symfony/Tests/Component/Validator

Documentation:

http://symfony.com/doc/2.0/book/validation.html

JSR-303 Specification:

http://jcp.org/en/jsr/detail?id=303

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