public function FormState::prepareCallback

public FormState::prepareCallback($callback)

Converts support notations for a form callback to a valid callable.

Specifically, supports methods on the form/callback object as strings when they start with ::, for example "::submitForm()".

Parameters

string|array $callback: The callback.

Return value

array|string A valid callable.

Overrides FormStateInterface::prepareCallback

File

core/lib/Drupal/Core/Form/FormState.php, line 1205

Class

FormState

Stores information about the state of a form.

Namespace

Drupal\Core\Form

Code

public function prepareCallback($callback) {
  if (is_string($callback) && substr($callback, 0, 2) == '::') {
    $callback = [$this->getFormObject(), substr($callback, 2)];
  }
  return $callback;
}