Online PHP editor | output for tEZS6

<?php class Event { protected $Events; public function dispatch() { echo "default Event \n"; } public function setEvents(Events $events) { $this->Events = $events; } } class customEvent extends Event { public function dispatch() { echo "should be in same notify loop"; } } class addedInIterationEvent extends Event { public function dispatch() { echo "addedInIterationEvent \n"; $this->Events->addEvent("customEvent",new customEvent()); } } class Events { protected $eventList = array(); public function notify() { $events = $this->eventList; for ($i = 0; $i <= sizeof($events); $i++) { if (isset(array_keys($events)[$i])) { $eventName = array_keys($events)[$i]; $event = $events[$eventName]; $event->setEvents($this); $event->dispatch(); $events = array_merge($events,$this->eventList); echo $eventName; } } } public function addEvent($name,$event) { $this->eventList[$name] = $event; } } $events = new Events(); $events->addEvent("basicEvent",new Event); $events->addEvent("addedInIterationEvent",new addedInIterationEvent); $events->notify();