public static function Textarea::valueCallback
public static Textarea::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 $form_state: The current state of the form.
Return value
mixed The value to assign to the element.
Overrides FormElement::valueCallback
File
- core/lib/Drupal/Core/Render/Element/Textarea.php, line 56
Class
- Textarea
- Provides a form element for input of multiple-line text.
Namespace
Drupal\Core\Render\ElementCode
public static function valueCallback(&$element, $input, FormStateInterface $form_state) { if ($input !== FALSE && $input !== NULL) { // This should be a string, but allow other scalars since they might be // valid input in programmatic form submissions. return is_scalar($input) ? (string) $input : ''; } return NULL; }
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https://api.drupal.org/api/drupal/core!lib!Drupal!Core!Render!Element!Textarea.php/function/Textarea::valueCallback/8.1.x