Initial Commit

database/php/pear/examples/cancel.php

@@ -0,0 +1,60 @@
+<?PHP
+/**
+ * example that shows how to cancel an event
+ *
+ * @package    Event_Dispatcher
+ * @subpackage Examples
+ * @author     Stephan Schmidt <schst@php.net>
+ */
+
+/**
+ * load Event_Dispatcher package
+ */
+require_once 'Event/Dispatcher.php';
+
+/**
+ * example sender
+ */
+class sender
+{
+    var $_dispatcher = null;
+    
+    function sender(&$dispatcher)
+    {
+        $this->_dispatcher = &$dispatcher;
+    }
+    
+    function foo()
+    {
+        $this->_dispatcher->post($this, 'onFoo', 'Some Info...');
+    }
+}
+
+/**
+ * example observer
+ */
+function receiver1(&$notification)
+{
+    echo "receiver 1 received notification<br />\n";
+    // the notification will be cancelled and no other observers
+    // will be notified
+    $notification->cancelNotification();
+}
+
+/**
+ * example observer
+ */
+function receiver2(&$notification)
+{
+    echo "receiver 2 received notification<br />\n";
+}
+
+
+$dispatcher = &Event_Dispatcher::getInstance();
+$sender = &new sender($dispatcher);
+
+$dispatcher->addObserver('receiver1', 'onFoo');
+$dispatcher->addObserver('receiver2', 'onFoo');
+
+$sender->foo();
+?>