====== Le Fichier xxxFormType.php ======
===== Exemple de fichier =====
<code php TestFormType.php>
<?php

namespace App\Form;

use App\Entity\Test;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\Extension\Core\Type\CheckboxType;
use Symfony\Component\Form\Extension\Core\Type\EmailType;
use Symfony\Component\Form\Extension\Core\Type\HiddenType;
use Symfony\Component\Form\Extension\Core\Type\SubmitType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolver;

class TestMailFormType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options): void
    {
        $builder
            ->add('num', HiddenType::class)
            ->add('mail', EmailType::class, [
                'label' => 'Entrez votre adresse e-mail',
                'attr' => ['class' => 'form-control form-control-lg', 'placeholder' => 'Adresse Email']
            ])
            ->add('acc_mailing', CheckboxType::class, ['required' => false, 'label'=>'Accepter mailing'])
            ->add('acc_contract', CheckboxType::class)
            ->add('submit', SubmitType::class, [
                'attr' => ['class' => 'btn btn-primary btn-lg btn-block'],
                'label' => 'Enregistrer'
            ]);
    }

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

</code>
===== Les Champs de formulaires =====
==== Options des champs ====
=== Attr ===
'' ['attr' => ['attribut1'=>'valeur','attribut2'=>'valeur']]''

Utilisé pour définir des attributs de la balise HTML du champ.
<code php>
$builder->add('mail', EmailType::class, ['attr' => ['class' => 'form-control form-control-lg', 'placeholder' => 'Adresse Email']]);
</code>
Ce qui nous affichera en HTML
<code html>
<input type="email" id="test_mail_form_mail" name="test_mail_form[mail]" required="required" class="form-control form-control-lg form-control" placeholder="Adresse Email" />
</code>
=== Label ===
'' ['label' => 'Mon Label']''
<code php>
$builder->add('mail', EmailType::class, ['label' => 'Entrez votre adresse e-mail']);
</code>
=== Required ===
 '' ['required' => false]''

Par défaut un champ est considéré comme Required,\\
pour le mettre non Required il faut mettre explicitement l'option '' ['required' => false]''
<code php>
$builder->add('acc_mailing', CheckboxType::class, ['required' => false])
</code>