public function FormState::isValueEmpty

public FormState::isValueEmpty($key)

Determines if a specific key has a value in the submitted form values.

Parameters

string|array $key: Values are stored as a multi-dimensional associative array. If $key is a string, it will return empty($values[$key]). If $key is an array, each element of the array will be used as a nested key. If $key = array('foo', 'bar') it will return empty($values['foo']['bar']).

Return value

bool TRUE if the $key has no value, FALSE otherwise.

Overrides FormStateInterface::isValueEmpty

File

core/lib/Drupal/Core/Form/FormState.php, line 1028

Class

FormState

Stores information about the state of a form.

Namespace

Drupal\Core\Form

Code

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