drupal 8 form alter
function hook_form_alter(&$form, \Drupal\Core\Form\FormStateInterface $form_state, $form_id) { if (isset($form['type']) && $form['type']['#value'] . '_node_settings' == $form_id) { $upload_enabled_types = \Drupal::config('mymodule.settings') ->get('upload_enabled_types'); $form['workflow']['upload_' . $form['type']['#value']] = array( '#type' => 'radios', '#title' => t('Attachments'), '#default_value' => in_array($form['type']['#value'], $upload_enabled_types) ? 1 : 0, '#options' => array( t('Disabled'), t('Enabled'), ), ); // Add a custom submit handler to save the array of types back to the config file. $form['actions']['submit']['#submit'][] = 'mymodule_upload_enabled_types_submit'; } }