public function ContainerAwareEventDispatcher::hasListeners in Drupal 8

Same name and namespace in other branches

1. 9 core/lib/Drupal/Component/EventDispatcher/ContainerAwareEventDispatcher.php \Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher::hasListeners()

File

core/lib/Drupal/Component/EventDispatcher/ContainerAwareEventDispatcher.php, line 196

Class

ContainerAwareEventDispatcher

A performance optimized container aware event dispatcher.

Namespace

Drupal\Component\EventDispatcher

Code

public function hasListeners($event_name = NULL) {
  if ($event_name !== NULL) {
    return !empty($this->listeners[$event_name]);
  }
  foreach ($this->listeners as $event_listeners) {
    if ($event_listeners) {
      return TRUE;
    }
  }
  return FALSE;
}