Setting background image of submit button in Symfony

Question

Instead of having a basic submit button that reads 'Search', I would like to set a background image of the button to an image of a search icon. I am not sure how to go about it because the entire form is set up in the controller as follows:

$form = $this->get('form.factory')->createNamedBuilder('', 'form', $search, array('csrf_protection' => false, 'attr' => array('class' => 'searchForm')))
            ->setAction($this->generateUrl('_search'))
            ->setMethod('GET')
            ->add('q', 'text', array('label'=>false, 'required' =>false))
            ->add('search', 'submit')
            ->getForm();

And I am currently rendering my Symfony form with Twig:

<div class="searchFormWrapper">
    {{ form(form) }}
</div>

I also tried this, however it renders the entire button search button and doesn't allow me to set the background image:

{{ form_widget(form.q) }}
{{ form_widget(form.search) }}

I appreciate any advice on how to accomplish this, thanks in advance!

Answer 1

You can add a CSS class to that button by:

->add('search', 'submit', array(
    'attr' => array('class' => 'my-custom-button-class'))
)

and style it in CSS.

Answer 2

You will need to style it using CSS. E.g:

<style type="text/css">
    .searchFormWrapper button {
        display: inline-block;
        width:100px;
        height:40px;
        background:url('PATH TO YOUR IMAGE') top left no-repeat;
        text-indent:-9000px;
        text-transform: capitalize;
        line-height: -9999px;
        overflow:hidden;
    }
</style>

Answer 3

Add a label in addition to pazulx's comment like so,

->add('search', 'submit', array(
    'label' => 'My label',
    'attr' => array('class' => 'my-custom-button-class'))
)