Initial Commit

database/php/pear/examples/object.php

@@ -0,0 +1,63 @@
+<?PHP
+/**
+ * example that show how to use objects as observers without
+ * loosing references
+ *
+ * @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()
+    {
+        $notification = &$this->_dispatcher->post($this, 'onFoo', 'Some Info...');
+        echo "notification::foo is {$notification->foo}<br />";
+    }
+}
+
+/**
+ * example observer
+ */
+class receiver
+{
+    var $foo;
+    
+    function notify(&$notification)
+    {
+        echo "received notification<br />";
+        echo "receiver::foo is {$this->foo}<br />";
+        $notification->foo = 'bar';
+    }
+}
+
+$dispatcher = &Event_Dispatcher::getInstance();
+
+$sender = &new sender($dispatcher);
+$receiver = new receiver();
+$receiver->foo = 42;
+
+// make sure you are using an ampersand here!
+$dispatcher->addObserver(array(&$receiver, 'notify'));
+
+$receiver->foo = 'bar';
+
+echo 'sender->foo()<br />';
+$sender->foo();
+?>