Symfony2 - How to set, and get, options when using a Form Class?

Question

I am using Form Classes to build the various form in my project.

In the Entity Type file, for the buildForm function, there is a secondary parameter of \"array $options\

Answer 1

Apparently it's not with getDefaultOptions() anymore, but with setDefaultOptions().

Otherwise it says

The option "my_custom_option" does not exist. Known options are: "action", "attr", "auto_initialize", ...

So, for me I had to update setDefaultOptions like this :

public function setDefaultOptions(OptionsResolverInterface $resolver)
{
    $resolver->setDefaults(array('my_custom_option' => false));
    // Others if needed, like in the documentation for : 'data_class' => 'VENDOR\Bundle\Entity\MyEntity', 'csrf_protection' => true
}

And then you can retrieve it in the buildForm method

public function buildForm(FormBuilderInterface $builder, array $options)
{
    $myCustomOption = $options['my_custom_option'];
}