FormState::isValueEmpty

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 登录查看完整内容