public static Checkboxes::valueCallback(&$element, $input, FormStateInterface $form_state)
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 $form_state: The current state of the form.
Return value
mixed The value to assign to the element.
Overrides FormElement::valueCallback
File
- core/lib/Drupal/Core/Render/Element/Checkboxes.php, line 96
Class
- Checkboxes
- Provides a form element for a set of checkboxes.
Namespace
Drupal\Core\Render\Element
Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 | public static function valueCallback(&$element, $input, FormStateInterface $form_state) { if ($input === FALSE) { $value = array(); $element += array('#default_value' => array()); foreach ($element['#default_value'] as $key) { $value[$key] = $key; } return $value; } elseif (is_array($input)) { // Programmatic form submissions use NULL to indicate that a checkbox // should be unchecked. We therefore remove all NULL elements from the // array before constructing the return value, to simulate the behavior // of web browsers (which do not send unchecked checkboxes to the server // at all). This will not affect non-programmatic form submissions, since // all values in \Drupal::request()->request are strings. // @see \Drupal\Core\Form\FormBuilderInterface::submitForm() foreach ($input as $key => $value) { if (!isset($value)) { unset($input[$key]); } } return array_combine($input, $input); } else { return array(); }} |
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