Particle\Validator is a very small validation library, with the easiest and most usable API we could possibly create.

Install

To easily include Particle\Validator into your project, install it via composer using the command line:

composer require particle/validator

Small usage example

use Particle\Validator\Validator;

$v = new Validator;

$v->required('user.first_name')->lengthBetween(2, 50)->alpha();
$v->required('user.last_name')->lengthBetween(2, 50)->alpha();
$v->required('newsletter')->bool();

$result = $v->validate([
    'user' => [
        'first_name' => 'John',
        'last_name' => 'D',
    ],
    'newsletter' => true,
]);

$result->isValid(); // bool(false).
$result->getMessages();
/**
 * array(1) {
 *     ["user.last_name"]=> array(1) {
 *         ["Length::TOO_SHORT"]=> string(53) "last_name is too short and must be 2 characters long."
 *     }
 * }
 */

Functional features

• Validate an array of data
• Get an array of error messages
• Overwrite the default error messages on rules, or error messages on specific values
• Get the validated values of an array
• Validate different contexts (insert, update, etc.) inheriting validations of the default context
• A large set of default validation rules
• Ability to extend the validator to add your own custom rules

Non functional features

• Easy to write (IDE auto-completion for easy development)
• Easy to read (improves peer review)
• Ability to separate controller and view logic
• Fully documented: validator.particle-php.com
• Fully tested: Scrutinizer
• Zero dependencies

===

Find more information and advanced usage examples at validator.particle-php.com