function system_settings_form

Sets up a form to save information automatically.

This function adds a submit handler and a submit button to a form array. The submit function saves all the data in the form.

If $form['#config'] is present in the form, the values will be saved to the named settings file (e.g., my_module.settings). If sub-elements or groups of sub-elements have their own '#config' keys, then values of those elements and their children will be saved to that settings file.

For example, consider the form:

$primary_config = config('my_module.settings');
$secondary_config = config('my_module.second');
$tertiary_config = config('my_module.third');
$form = array(
  '#config' => 'my_module.settings',
  'first_setting' => array(
    '#type' => 'textfield',
    '#title' => t('First Setting'),
    '#default_value' => $primary_config->get('first_setting'),
  ),
  'second_setting' => array( ... ),

  'bonus_fieldset' => array(
    '#type' => 'fieldset',
    '#title' => t('Secondary Settings'),
    '#config' => 'my_module.second',

    'bonus_one' => array( ... ),
    'bonus_two' => array( ... ),

    'bonus_three' => array(
      '#type' => 'textfield',
      '#default_value' => $tertiary_config->get('bonus_three'),
      '#config' => 'my_module.third',
    ),
  ),
);

The top-level '#config' is "my_module.settings". The values of 'first_setting' and 'second_setting' will both be saved to "my_module.settings".

The 'bonus_fieldset' has its own '#config' setting, "my_module.second", which overrides the top-level '#config' setting, so 'bonus_one' and 'bonus_two' will be saved to "my_module.second".

The 'bonus_three' has its own '#config' setting, "my_module.third", which overrides the one from the fieldset. The value of 'bonus_three' will be saved to the "my_module.third".

Modules that implement hook_form_alter() can use the '#config' settings to save their data to their own settings file by setting the '#config' parameter in their elements or fieldsets.

If no top-level $form['#config'] value is present, then the values will be saved to variables using variable_set() from the Drupal compatibility layer. This behavior is deprecated and will be remove in Backdrop 2.0.

If you need to manipulate the data in a custom manner, you can either put your own submission handler in the form array before calling this function, or just use your own submission handler instead of calling this function.

@since 1.6.0 Restored and made compatible with configuration management.

Parameters

$form: An associative array containing the structure of the form.

Return value

The form structure.:

See also

system_settings_form_submit()

_system_sort_form_values_by_config()

File

core/modules/system/system.module, line 4602

Configuration system that lets administrators modify the workings of the site.

Code

function system_settings_form($form) {
  $form['actions']['#type'] = 'actions';
  $form['actions']['submit'] = array('#type' => 'submit', '#value' => t('Save configuration'));

  if (empty($form['#config']) && !settings_get('backdrop_drupal_compatibility')) {
    backdrop_set_message(t('Drupal compatibility layer is disabled and this form has not been updated to use Backdrop configuration management. Changes will not be saved.'), 'warning');
  }

  if (!empty($_POST) && form_get_errors()) {
    backdrop_set_message(t('The settings have not been saved because of the errors.'), 'error');
  }
  $form['#submit'][] = 'system_settings_form_submit';
  if (!isset($form['#theme'])) {
    $form['#theme'] = 'system_settings_form';
  }
  return $form;
}