I have programmed module having a form (using Drupals's form API) which contains radio checkboxes like this:
$form['r_8'] = array( '#type' => 'radios', '#options' => array( '1' => t('Yes'), '0' => t('No') ), '#required' => TRUE, '#checked' => '', // ??? '#title' => t('a label text ... '), '#default_value' => !empty($form_state['values']['r_8']) ? $form_state['values']['r_8'] : '', '#suffix' => '<div style="clear: left"></div>' );
When the page with that form is initially loaded, I want all these radios initially unchecked. I tried to set the #checked property to FALSE, but it doesn't work. Setting the #default_value to, for example, -1, a warning raises (which I can understand, because -1 is none of the provided option values).
Is there any way to load initially the form with the radio's unchecked?
I could not find any information pointer so that's why I ask here.
Thanks in advance!