function Radios::processRadios

Expands a radios element into individual radio elements.

File

core/lib/Drupal/Core/Render/Element/Radios.php, line 61

Class

Radios

Provides a form element for a set of radio buttons.

Namespace

Code

public static function processRadios(&$element, FormStateInterface $form_state, &$complete_form) {
    if (count($element['#options']) > 0) {
        $weight = 0;
        foreach ($element['#options'] as $key => $choice) {
            // Maintain order of options as defined in #options, in case the element
            // defines custom option sub-elements, but does not define all option
            // sub-elements.
            $weight += 0.001;
            $element += [
                $key => [],
            ];
            // Generate the parents as the autogenerator does, so we will have a
            // unique id for each radio button.
            $parents_for_id = array_merge($element['#parents'], [
                $key,
            ]);
            $element[$key] += [
                '#type' => 'radio',
                '#title' => $choice,
                // The key is sanitized in Drupal\Core\Template\Attribute during output
                // from the theme function.
'#return_value' => $key,
                // Use default or FALSE. A value of FALSE means that the radio button is
                // not 'checked'.
'#default_value' => $element['#default_value'] ?? FALSE,
                '#attributes' => $element['#attributes'],
                '#parents' => $element['#parents'],
                '#id' => HtmlUtility::getUniqueId('edit-' . implode('-', $parents_for_id)),
                '#ajax' => $element['#ajax'] ?? NULL,
                // Errors should only be shown on the parent radios element.
'#error_no_message' => TRUE,
                '#weight' => $weight,
            ];
        }
    }
    return $element;
}