once() публичный Метод

Set listener for event that will fire only once. This method returns EventListener
public once ( string $event, callable $listener ) : EventListener
$event string
$listener callable
Результат EventListener
Документация по интерфейсу EventEmitterInterface
Пример #1
0
 /**
  * @see EventEmitterInterface::once
  */
 public function once($event, callable $listener)
 {
     $handler = $this->emitter->once($event, $listener);
     return new EventListener($this, $handler->getEvent(), $handler->getHandler(), $handler->getListener());
 }
Пример #2
0
 /**
  * @dataProvider emitterProvider
  */
 public function testApiRemoveListener_RemovesListener_ForOnceListeners(EventEmitterInterface $emitter)
 {
     $never = $this->expectCallableNever();
     $once = $this->expectCallableOnce();
     $emitter->once('test', $never);
     $emitter->once('test', $once);
     $emitter->removeListener('test', $never);
     $emitter->emit('test');
 }