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run code in 300+ PHP versions simultaneously
<?php class E{function r($e, $l){$this->e[$e][] = $l;} function d($e){foreach ($this->e[$e] as $l){$l->o();}}} class Listener { function o() { echo 'hello'; } } $listener = new Listener(); $eventDispatcher = new E(); $eventDispatcher->r('event1', $listener); $eventDispatcher->r('event1', $listener); $eventDispatcher->r('event2', $listener); $eventDispatcher->d('event1');
Output for 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Deprecated: Creation of dynamic property E::$e is deprecated in /in/ma9hZ on line 2 hellohello
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28
hellohello
preferences:
331.38 ms | 405 KiB | 460 Q