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コントローラの使用¶Actions are methods on a controller that handle requests. By default all public methods on a controller map to actions and are accessible by a URL. Actions are responsible for interpreting the request and creating the response. Usually responses are in the form of a rendered view, but there are other ways to create responses as well. For instance, when you access a URL like this: http://localhost/blog/posts/show/2015/the-post-title Phalcon by default will decompose each part like this:
In this case, the PostsController will handle this request. There is no a special location to put controllers in an application, they could be loaded using autoloaders, so you’re free to organize your controllers as you need. Controllers must have the suffix “Controller” while actions the suffix “Action”. A sample of a controller is as follows: <?php
use Phalcon\Mvc\Controller;
class PostsController extends Controller
{
public function indexAction()
{
}
public function showAction($year, $postTitle)
{
}
}
Additional URI parameters are defined as action parameters, so that they can be easily accessed using local variables. A controller can optionally extend Phalcon\Mvc\Controller. By doing this, the controller can have easy access to the application services. Parameters without a default value are handled as required. Setting optional values for parameters is done as usual in PHP: <?php
use Phalcon\Mvc\Controller;
class PostsController extends Controller
{
public function indexAction()
{
}
public function showAction($year = 2015, $postTitle = "some default title")
{
}
}
Parameters are assigned in the same order as they were passed in the route. You can get an arbitrary parameter from its name in the following way: <?php
use Phalcon\Mvc\Controller;
class PostsController extends Controller
{
public function indexAction()
{
}
public function showAction()
{
$year = $this->dispatcher->getParam("year");
$postTitle = $this->dispatcher->getParam("postTitle");
}
}
Dispatch Loop¶The dispatch loop will be executed within the Dispatcher until there are no actions left to be executed. In the previous example only one
action was executed. Now we’ll see how the <?php
use Phalcon\Mvc\Controller;
class PostsController extends Controller
{
public function indexAction()
{
}
public function showAction($year, $postTitle)
{
$this->flash->error(
"You don't have permission to access this area"
);
// Forward flow to another action
$this->dispatcher->forward(
[
"controller" => "users",
"action" => "signin",
]
);
}
}
If users don’t have permission to access a certain action then they will be forwarded to the ‘signin’ action in the Users controller. <?php
use Phalcon\Mvc\Controller;
class UsersController extends Controller
{
public function indexAction()
{
}
public function signinAction()
{
}
}
There is no limit on the “forwards” you can have in your application, so long as they do not result in circular references, at which point your application will halt. If there are no other actions to be dispatched by the dispatch loop, the dispatcher will automatically invoke the view layer of the MVC that is managed by Phalcon\Mvc\View. コントローラの初期化¶Phalcon\Mvc\Controller offers the <?php
use Phalcon\Mvc\Controller;
class PostsController extends Controller
{
public $settings;
public function initialize()
{
$this->settings = [
"mySetting" => "value",
];
}
public function saveAction()
{
if ($this->settings["mySetting"] === "value") {
// ...
}
}
}
If you want to execute some initialization logic just after the controller object is constructed then you can implement the
<?php
use Phalcon\Mvc\Controller;
class PostsController extends Controller
{
public function onConstruct()
{
// ...
}
}
サービスの注入¶If a controller extends Phalcon\Mvc\Controller then it has easy access to the service container in application. For example, if we have registered a service like this: <?php
use Phalcon\Di;
$di = new Di();
$di->set(
"storage",
function () {
return new Storage(
"/some/directory"
);
},
true
);
Then, we can access that service in several ways: <?php
use Phalcon\Mvc\Controller;
class FilesController extends Controller
{
public function saveAction()
{
// Injecting the service by just accessing the property with the same name
$this->storage->save("/some/file");
// Accessing the service from the DI
$this->di->get("storage")->save("/some/file");
// Another way to access the service using the magic getter
$this->di->getStorage()->save("/some/file");
// Another way to access the service using the magic getter
$this->getDi()->getStorage()->save("/some/file");
// Using the array-syntax
$this->di["storage"]->save("/some/file");
}
}
If you’re using Phalcon as a full-stack framework, you can read the services provided by default in the framework. リクエストとレスポンス¶Assuming that the framework provides a set of pre-registered services. We explain how to interact with the HTTP environment. The “request” service contains an instance of Phalcon\Http\Request and the “response” contains a Phalcon\Http\Response representing what is going to be sent back to the client. <?php
use Phalcon\Mvc\Controller;
class PostsController extends Controller
{
public function indexAction()
{
}
public function saveAction()
{
// Check if request has made with POST
if ($this->request->isPost()) {
// Access POST data
$customerName = $this->request->getPost("name");
$customerBorn = $this->request->getPost("born");
}
}
}
The response object is not usually used directly, but is built up before the execution of the action, sometimes - like in an afterDispatch event - it can be useful to access the response directly: <?php
use Phalcon\Mvc\Controller;
class PostsController extends Controller
{
public function indexAction()
{
}
public function notFoundAction()
{
// Send a HTTP 404 response header
$this->response->setStatusCode(404, "Not Found");
}
}
Learn more about the HTTP environment in their dedicated articles request and response. セッションデータ¶Sessions help us maintain persistent data between requests. You can access a Phalcon\Session\Bag from any controller to encapsulate data that needs to be persistent: <?php
use Phalcon\Mvc\Controller;
class UserController extends Controller
{
public function indexAction()
{
$this->persistent->name = "Michael";
}
public function welcomeAction()
{
echo "Welcome, ", $this->persistent->name;
}
}
Using Services as Controllers¶Services may act as controllers, controllers classes are always requested from the services container. Accordingly, any other class registered with its name can easily replace a controller: <?php
// Register a controller as a service
$di->set(
"IndexController",
function () {
$component = new Component();
return $component;
}
);
// Register a namespaced controller as a service
$di->set(
"Backend\\Controllers\\IndexController",
function () {
$component = new Component();
return $component;
}
);
コントローラのイベント¶Controllers automatically act as listeners for dispatcher events, implementing methods with those event names allow you to implement hook points before/after the actions are executed: <?php
use Phalcon\Mvc\Controller;
class PostsController extends Controller
{
public function beforeExecuteRoute($dispatcher)
{
// This is executed before every found action
if ($dispatcher->getActionName() === "save") {
$this->flash->error(
"You don't have permission to save posts"
);
$this->dispatcher->forward(
[
"controller" => "home",
"action" => "index",
]
);
return false;
}
}
public function afterExecuteRoute($dispatcher)
{
// Executed after every found action
}
}
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