Symfony 2

Symfony 2 Kris Wallsmith @kriswallsmith April 20, 2010

An evolution of symfony 1.x • Same philosophy: • Full stack • Conﬁgurable • Testable • Components • Brand new foundation

Don’t reinvent the wheel • Doctrine • PHPUnit • SwiftMailer • Zend_Cache • Zend_Log

PHP 5.3 • Namespaces • Anonymous functions / closures • Late static binding

Symfony Components • Standalone libraries • Each with a speciﬁc scope • components.symfony-project.org

Symfony Components • BrowserKit • Process • Console • RequestHandler • CssSelector • Routing • DependencyInjection • Templating • DomCrawler • Yaml • EventDispatcher • OutputEscaper

Dependency Injection • A method of supplying an external dependency

Dependency Injection class User { protected $session; public function __construct(Session $session) { $this->session = $session; } }

DI Container • A method of organizing dependencies • Adds a conﬁguration layer • Dependency injection does not require a container!

DI Container # in config.yml parameters: mailer.username: foo mailer.password: bar mailer.class: Zend_Mail mailer.transport.class: Zend_Mail_Transport_Smtp services: mail.transport: class: %mailer.transport.class% arguments: - smtp.gmail.com - { auth: login, username: %mailer.username%, password: %mailer.password%, ssl: ssl, port: 465 } shared: false mailer: class: %mailer.class% calls: - [setDefaultTransport, [@mail.transport]]

DI Container # in config_dev.yml imports: - config.yml parameters: mailer.transport.class: Zend_Mail_Transport_Null

DI Container use SymfonyComponentsDependencyInjection as DI; use SymfonyComponentsDependencyInjectionLoader; $container = new DIContainer(); $loader = new LoaderYamlFileLoader($container); $loader->load(‘config_dev.yml’); $mailer = $container->mailer;

Event Dispatcher • Implements the observer design pattern • Similar to events in JavaScript

Event Dispatcher use SymfonyComponentsEventDispatcherEvent; class Article { protected $dispatcher; public function __construct($dispatcher) { $this->dispatcher = $dispatcher; } public function save() { // ... $event = new Event($this, ‘article.save’); $this->dispatcher->notify($event); } }

Event Dispatcher class Thumbnailer { public function connect($dispatcher) { $dispatcher->connect(‘article.save’, array( $this, ‘generateArticleThumbnails’ )); } public function generateArticleThumbnails($event) { // ... } }

The Symfony 2 sandbox • curl -L http://bit.ly/sf2sbox > sandbox.tgz • tar xzf sandbox.tgz • cd sandbox • chmod a+w hello/cache/ hello/logs • chmod a+x hello/console

The Symfony 2 sandbox

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Symfony 2

by Kris Wallsmith on Apr 21, 2010

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