public static function WebformRadiosOther::valueCallback in Webform 6.x

Same name and namespace in other branches

1. 8.5 src/Element/WebformRadiosOther.php \Drupal\webform\Element\WebformRadiosOther::valueCallback()

Determines how user input is mapped to an element's #value property.

Parameters

array $element: An associative array containing the properties of the element.

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

\Drupal\Core\Form\FormStateInterface $form_state: The current state of the form.

Return value

mixed The value to assign to the element.

Overrides WebformOtherBase::valueCallback

File

src/Element/WebformRadiosOther.php, line 22

Class

WebformRadiosOther

Provides a webform element for radio buttons with an other option.

Namespace

Drupal\webform\Element

Code

public static function valueCallback(&$element, $input, FormStateInterface $form_state) {

  // Remove 'webform_' prefix from type.
  $type = str_replace('webform_', '', static::$type);

  // Unset #default_value that is not a valid #option.
  //
  // This behavior is needed when a radios #default_value was previously set
  // but now the radios are unchecked via conditional logic. This results in
  // nothing being posted back to the server, and the #default_value is used
  // which throws "An illegal choice has been detected." error.
  if ($input && !isset($input[$type]) && isset($element['#default_value']) && !isset($element['#option'][$element['#default_value']])) {
    unset($element['#default_value']);
  }
  return parent::valueCallback($element, $input, $form_state);
}