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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