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 $key has no value, FALSE otherwise.
Overrides FormStateInterface::isValueEmpty
File
- core/lib/Drupal/Core/Form/FormState.php, line 1028
Class
- FormState
- Stores information about the state of a form.
Namespace
Drupal\Core\FormCode
public function isValueEmpty($key) { $exists = NULL; $value = NestedArray::getValue($this->getValues(), (array) $key, $exists); return !$exists || empty($value); }
© 2001–2016 by the original authors
Licensed under the GNU General Public License, version 2 and later.
Drupal is a registered trademark of Dries Buytaert.
https://api.drupal.org/api/drupal/core!lib!Drupal!Core!Form!FormState.php/function/FormState::isValueEmpty/8.1.x