public static function ImageButton::valueCallback in Drupal 9
Same name and namespace in other branches
- 8 core/lib/Drupal/Core/Render/Element/ImageButton.php \Drupal\Core\Render\Element\ImageButton::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 $form_state: The current state of the form.
Return value
mixed The value to assign to the element.
Overrides FormElement::valueCallback
File
- core/
lib/ Drupal/ Core/ Render/ Element/ ImageButton.php, line 33
Class
- ImageButton
- Provides a form element for a submit button with an image.
Namespace
Drupal\Core\Render\ElementCode
public static function valueCallback(&$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'];
}
}
}