The Yaf_Plugin_Abstract class
Plugins allow for easy extensibility and customization of the framework. A plugin is a class extending Yaf_Plugin_Abstract that overrides one or more hook methods, which are called automatically at fixed points of the dispatch cycle: before and after routing, before and after the dispatch loop, and before and after each single dispatch.
Intro
Plugins allow for easy extensibility and customization of the framework. A plugin is a class extending Yaf_Plugin_Abstract that overrides one or more hook methods, which are called automatically at fixed points of the dispatch cycle: before and after routing, before and after the dispatch loop, and before and after each single dispatch.
A plugin is attached to the dispatcher with Yaf_Dispatcher::registerPlugin, typically in the Bootstrap; after registration, all the hook methods the plugin implements are called at the proper time, each receiving the current Yaf_Request_Abstract and Yaf_Response_Abstract instances.
Examples
Plugin example
<?php
/* bootstrap class should be defined under ./application/Bootstrap.php */
class Bootstrap extends Yaf_Bootstrap_Abstract {
public function _initPlugin(Yaf_Dispatcher $dispatcher) {
/* register a plugin */
$dispatcher->registerPlugin(new TestPlugin());
}
}
/* plugin class should be placed under ./application/plugins/ */
class TestPlugin extends Yaf_Plugin_Abstract {
public function routerStartup(Yaf_Request_Abstract $request, Yaf_Response_Abstract $response) {
/* before router
in this hook, user can do some url rewrite */
var_dump("routerStartup");
}
public function routerShutdown(Yaf_Request_Abstract $request, Yaf_Response_Abstract $response) {
/* router complete
in this hook, user can do login check */
var_dump("routerShutdown");
}
public function dispatchLoopStartup(Yaf_Request_Abstract $request, Yaf_Response_Abstract $response) {
var_dump("dispatchLoopStartup");
}
public function preDispatch(Yaf_Request_Abstract $request, Yaf_Response_Abstract $response) {
var_dump("preDispatch");
}
public function postDispatch(Yaf_Request_Abstract $request, Yaf_Response_Abstract $response) {
var_dump("postDispatch");
}
public function dispatchLoopShutdown(Yaf_Request_Abstract $request, Yaf_Response_Abstract $response) {
/* final hook
in this hook user can do logging or implement layout */
var_dump("dispatchLoopShutdown");
}
}
Class IndexController extends Yaf_Controller_Abstract {
public function indexAction() {
return FALSE; //prevent rendering
}
}
$config = array(
"application" => array(
"directory" => dirname(__FILE__) . "/application/",
),
);
$app = new Yaf_Application($config);
$app->bootstrap()->run();
?>The above example will output something similar to:
string(13) "routerStartup"
string(14) "routerShutdown"
string(19) "dispatchLoopStartup"
string(11) "preDispatch"
string(12) "postDispatch"
string(20) "dispatchLoopShutdown"Class synopsis
Yaf-plugin-abstract