Symfony2, How to make a form label class/attr different than its input?

Question

I would like to build a form with label and inputs, but the class of them should be different. Code below creates the label for the input with same attr:

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Answer 1

As mentioned in the documentation:

• attr : A key-value array that will be rendered as HTML attributes on the field
• label_attr: A key-value array that will be rendered as HTML attributes on the label

You can set those attributes in twig template or in form builder:

Twig template:

• for symfony 2.1 and newer use:

  {{ form_label(form.hours, null, {'label_attr': {'class': 'foo'}}) }}
  

• in the legacy symfony 2.0 it used to be

  {{ form_label(form.hours, { 'label_attr': {'class': 'MYCLASSFOR_LABEL'} }) }}
  {{ form_widget(form.hours, { 'attr': {'class': 'MYCLASSFOR_INPUTS'} }) }}
  

Form builder

public function buildForm(FormBuilderInterface $builder, array $options)
{
    $builder->add('hours', null, array(
        'label_attr' => array('class' => 'MYCLASSFOR_LABEL'),
        'attr'       => array('class' => 'MYCLASSFOR_INPUTS'),
    ));
}

Answer 2

The above is no longer correct, at least in the context I was using it. In Symfony 2.1 the solution is:

{{ form_label(form.item, label|default(null), { 'label_attr': { 'class': 'MYCLASS' } }) }}

Answer 3

This works for me in Symfony 2.3:

{{ form_row(form.hours,  {   'label': 'Hours:'
                            ,'label_attr': {'class': 'MYCLASSFOR_LABEL'}
                            ,'attr': {'class': 'MYCLASSFOR_INPUTS'} 
                        }
           )
}}

Answer 4

This may be new, but there's an easy way to do this now:

$builder
    ->add('hours', null , array(
        'attr'=> 
            array(
                'placeholder'=>'Working Hours',
                'class'=>'MYCLASSFOR_INPUTS') 
        ) ,
        'label_attr' => array(
            'class' => 'MYCLASSFOR_LABEL'
        )
    );

The option you're looking for is label_attr.