public FormStateInterface::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 $key has no value, FALSE otherwise.
File
- core/lib/Drupal/Core/Form/FormStateInterface.php, line 369
Class
- FormStateInterface
- Provides an interface for an object containing the current state of a form.
Namespace
Drupal\Core\Form
Code
public function isValueEmpty($key);
Please login to continue.