public function FormStateValuesTrait::isValueEmpty in Drupal 8

Same name and namespace in other branches

1. 9 core/lib/Drupal/Core/Form/FormStateValuesTrait.php \Drupal\Core\Form\FormStateValuesTrait::isValueEmpty()

Implements \Drupal\Core\Form\FormStateInterface::isValueEmpty()

File

core/lib/Drupal/Core/Form/FormStateValuesTrait.php, line 70

Class

FormStateValuesTrait

Provides methods to manage form state values.

Namespace

Drupal\Core\Form

Code

public function isValueEmpty($key) {
  $exists = NULL;
  $value = NestedArray::getValue($this
    ->getValues(), (array) $key, $exists);
  return !$exists || empty($value);
}