function form_type_select_value

Determines the value for a select form element.


$element: The form element whose value is being populated.

$input: The incoming input to populate the form element. If this is FALSE, the element's default value should be returned.

Return value

The data that will appear in the $element_state['values'] collection for this element. Return nothing to use the default.

Related topics


drupal/includes/, line 2535
Functions for form and batch generation and processing.


function form_type_select_value($element, $input = FALSE) {
  if ($input !== FALSE) {
    if (isset($element['#multiple']) && $element['#multiple']) {

      // If an enabled multi-select submits NULL, it means all items are
      // unselected. A disabled multi-select always submits NULL, and the
      // default value should be used.
      if (empty($element['#disabled'])) {
        return is_array($input) ? drupal_map_assoc($input) : array();
      else {
        return isset($element['#default_value']) && is_array($element['#default_value']) ? $element['#default_value'] : array();
    elseif (isset($element['#empty_value']) && $input === (string) $element['#empty_value']) {
      return $element['#empty_value'];
    else {
      return $input;