A simple package to help integrate ALTCHA on Symfony Form.

This packages integrates ALTCHA, a privacy-friendly Captcha alternative, with Symfony forms. Simply add an AltchaType field to your form and this package will automatically check the challenge issue.

ALTCHA uses a proof-of-work mechanism to protect your website, APIs, and online services from spam and unwanted content.

Unlike other solutions, ALTCHA is free, open-source and self-hosted, does not use cookies nor fingerprinting, does not track users, and is fully compliant with GDPR.

Say goodbye to tedious puzzle-solving and improve your website's UX by integrating a fully automated proof-of-work mechanism.

Support

• Symfony 6.4+
• PHP 8.1+

Installation

You can install the package via Composer:

composer require huluti/altcha-bundle

Add bundle into config/bundles.php file :

Huluti\AltchaBundle\HulutiAltchaBundle::class => ['all' => true]

Add a config file config/packages/huluti_altcha.php:

use Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator;

return static function (ContainerConfigurator $containerConfigurator): void {
    $containerConfigurator->extension('huluti_altcha', [
        'enable' => true,
        'hmacKey' => 'RANDOM_SECRET_KEY',
        'floating' => true,
    ]);

    if ('test' === $containerConfigurator->env()) {
        // Disable captcha in test environment
        $containerConfigurator->extension('huluti_altcha', [
            'enable' => false,
        ]);
    }
};

Import bundle routes:

$routingConfigurator->import('@HulutiAltchaBundle/config/routes.yml');

Use with your Symfony Form

Create a form type and insert an AltchaType to add the captcha:

<?php

namespace App\Form;

use App\Entity\Contact;
use Huluti\AltchaBundle\Type\AltchaType;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\Extension\Core\Type\SubmitType;
use Symfony\Component\Form\Extension\Core\Type\TextareaType;
use Symfony\Component\Form\Extension\Core\Type\TextType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolver;

class ContactType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options): void
    {
        $builder
            ->add('name', TextType::class, ['label' => false, 'attr' => ['placeholder' => 'name']])
            ->add('message', TextareaType::class, ['label' => false, 'attr' => ['placeholder' => 'message']])
            ->add('security', AltchaType::class, ['label' => false])
            ->add('submit', SubmitType::class)
        ;
    }

    public function configureOptions(OptionsResolver $resolver): void
    {
        $resolver->setDefaults([
            'data_class' => Contact::class,
        ]);
    }
}

License

The MIT License (MIT). Please see License File for more information.