创建版本

app/Support/EventDispatcher.php

@@ -0,0 +1,18 @@
+<?php namespace App\Support;
+
+use Symfony\Component\EventDispatcher\EventDispatcher as BaseEventDispatcher;
+use Symfony\Component\EventDispatcher\GenericEvent;
+
+class EventDispatcher extends BaseEventDispatcher
+{
+    protected function doDispatch($listeners, $eventName, GenericEvent $event)
+    {
+        foreach ($listeners as $listener) {
+            if ($event->isPropagationStopped()) {
+                break;
+            }
+            $arguments = \call_user_func($listener, $event->getArguments(), $eventName, $this);
+            $event->setArguments($arguments);
+        }
+    }
+}