I want to upload the image as the background in the settings page of the zen theme.

In zen , It's easy to add an extra field in the theme-settings.php and it's worked at the single site system.

However,I want to add this feature to the domain access Website.

And I got some error message.

I just write the code as belowed:

$form['background_file'] = array(
    '#type'     => 'managed_file',
    '#title'    => t('Background'),
    '#required' => True,
    '#upload_location' => file_default_scheme() . '://theme/backgrounds/',
    '#default_value' => theme_get_setting('background_file'), 
    '#upload_validators' => array(
      'file_validate_extensions' => array('gif png jpg jpeg'),

enter image description here

picture above appeared correct.

But when i push the upload button.

I got the error message belowed enter image description here

Notice: Undefined index: system_theme_settings in drupal_retrieve_form() (line 806 of /Library/WebServer/Documents/official/includes/form.inc).
Warning: call_user_func_array() expects parameter 1 to be a valid callback, function 'system_theme_settings' not found or invalid function name in drupal_retrieve_form() (line 841 of /Library/WebServer/Documents/official/includes/form.inc).
Notice: Undefined index: var in variable_realm_form_system_theme_settings_alter() (line 618 of /Library/WebServer/Documents/official/sites/all/modules/variable/variable_realm/variable_realm.module).
Notice: Undefined index: background_file in file_ajax_upload() (line 271 of /Library/WebServer/Documents/official/modules/file/file.module).
Notice: Undefined index: #suffix in file_ajax_upload() (line 280 of /Library/WebServer/Documents/official/modules/file/file.module).

and i really don't know how to fix that.

I just referenced the content below and i can't find the answer.

Does someone fixed this situation before?

thanks a lot.

  • Working fine for me.. Where are you adding the code i mean in which file? Nov 19, 2014 at 7:54
  • Looks like theme-settings.php Nov 19, 2014 at 15:29
  • dammit! - works for me too. What is your Domain Access configuration looking like ? Nov 21, 2014 at 19:59
  • Do you get these errors when you save the form without trying to upload an image ? Nov 24, 2014 at 21:25

2 Answers 2


The form needs to be able to find system_theme_settings() when getting rebuilt via ajax.

form_load_include($form_state, 'inc', 'system', 'system.admin'); inside of theme-settings.php hook_form_system_theme_settings_alter() should do the trick.

    '#type'         => 'fieldset',
    '#title'        => 'Extra Image',
    '#description'  => 'Image Fieldset',
    '#collapsible'  => TRUE, 
    '#collapsed'    => FALSE,
    '#weight'       => -10,
        '#type'     => 'managed_file',
        '#title'    => 'test title',
        '#description' => 'description',
        '#required' => FALSE,
        '#upload_location' => file_default_scheme() . '://theme/backgrounds/',
        '#default_value' => theme_get_setting('background_file'), 
        '#upload_validators' => array(
          'file_validate_extensions' => array('gif png jpg jpeg'),

This code !!

  • This is the actual answer... great job. Jan 7, 2016 at 11:00

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