public static ImageButton::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 $form_state: The current state of the form.
Return value
mixed The value to assign to the element.
Overrides FormElement::valueCallback
File
- core/lib/Drupal/Core/Render/Element/ImageButton.php, line 33
Class
- ImageButton
- Provides a form element for a submit button with an image.
Namespace
Drupal\Core\Render\Element
Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 | public static function valueCallback(&$element, $input, FormStateInterface $form_state) { if ($input !== FALSE) { if (!empty($input)) { // If we're dealing with Mozilla or Opera, we're lucky. It will // return a proper value, and we can get on with things. return $element['#return_value']; } else { // Unfortunately, in IE we never get back a proper value for THIS // form element. Instead, we get back two split values: one for the // X and one for the Y coordinates on which the user clicked the // button. We'll find this element in the #post data, and search // in the same spot for its name, with '_x'. $input = $form_state->getUserInput(); foreach (explode('[', $element['#name']) as $element_name) { // chop off the ] that may exist. if (substr($element_name, -1) == ']') { $element_name = substr($element_name, 0, -1); } if (!isset($input[$element_name])) { if (isset($input[$element_name . '_x'])) { return $element['#return_value']; } return NULL; } $input = $input[$element_name]; } return $element['#return_value']; } }} |
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