public function buildForm(FormBuilderInterface $builder, array $options)
{
builder->add('birthday', BirthdayType::class, array(
'placeholder' => array(
'year' => 'Year', 'month' => 'Month', 'day' => 'Day',
),
'label' => 'Дата рождения',
'attr' => array('class' => 'select_style')
))
}
{{ form_widget(form.birthday.day,{'attr': {'class':'name_class_style'}}) }}
{{ form_widget(form.birthday.month,{'attr': {'class':'name_class_style'}}) }}
{{ form_widget(form.birthday.year,{'attr': {'class':'name_class_style'}}) }}