A Practical Introduction to Symfony2

A Practical Introductionto Symfony2

Kris Wallsmith

PHP Matsuri • October 2, 2010

Saturday, October 2, 2010

@kriswallsmith

• Release Manager for symfony 1.3 & 1.4

• Doctrine contributor

• Senior Software Engineer at

• 10 years experience in web development

• Open source evangelist and international speaker

the evolution of symfony

• Mojavi 3

• symfony (2007)

• Symfony2 (2011)

a quick note for thecase-sensitive among us

talk about “symfony”

talk about “symfony 1”

talk about “Symfony2”

there is no “Symfony 1”

there is no “symfony 2”

less search-friendly

{Saturday, October 2, 2010

Symfony2

Symfony2#

the evolution of symfony

• Mojavi 3

• symfony (2007)

• Symfony2 (2011)

what’s old?

• same philosophy as symfony 1

what’s old?

• don’t reinvent the wheel

what’s old?

• loosely-coupled components

what’s old?

• predictable conventions

what’s old?

• highly configurable

what’s old?

• testable

what’s old?

• testable

• awesome developer tools

what’s new?

• PHP 5.3

• a brand new foundation

what’s new?

• PHP 5.3

• more smart, more lazy

what’s new?

• PHP 5.3

• REALLY REALLY FAST

what’s new?

• PHP 5.3

• REALLY REALLY FAST

PHP 5.3

• namespaces

• closures

HTTP\Message\Request

HTTP\Client\Request

closures

• anonymous functions

• lambda functions

a new foundation

anatomy of a Symfony2 request

• Kernel

• Request

• Kernel

• Request

• Controller

• Kernel

• Request

• Controller

• Response

• index.php creates a Kernel

• the kernel creates a Request

• the kernel passes the Request to the ControllerResolver

• the ControllerResolver returns a callable

• the kernel calls the callable

• the callable returns a Response

Silexhttp://github.com/fabpot/Silex

just enough, nothing more

switch ($_GET['pg'])case 'edit':// ...

Any volunteers to rewrite WordPress in Silex?

quick tour

frontend/src/web/

frontend/ FrontendKernel.php cache/ config/ console logs/ phpunit.xml

src/ autoload.php Application/ Bundle/ vendor/ symfony/ doctrine/

web/ css/ images/ index.php index_dev.php js/

../ MainBundle/ Controller/ MainBundle.php Resources/ config/ views/ Tests/

How do I use it?

# frontend/config/routing.ymlhomepage: pattern: / defaults: _controller: MainBundle:Main:index requirements: _method: get

// src/Application/MainBundle/Controller/MainController.phpnamespace Application\MainBundle\Controller;

class MainController extends Controller{ public function indexAction() { return $this->render('MainBundle:Main:index.php'); }}

namespace Application\MainBundle\Controller;

homepage: pattern: / defaults: _controller: MainBundle:Main:index requirements: _method: get

class BlogController extends Controller { public function showArticleAction($slug, $year) { // ... return $this->render('MainBundle:Blog:showArticle.php', array('article' => $article)); }}

homepage: pattern: /:year/:slug defaults: _controller: MainBundle:Blog:showArticle requirements: year: \d{4}

MainBundle/Resources/ config/ views/ Blog/ showArticle.php Main/ error404.php index.php layout.php

return $this->render('MainBundle:Blog:showArticle.php', array('article' => $article));

MainBundle/Resources/ config/ views/ Blog/ showArticle.twig Main/ error404.php index.php layout.php

return $this->render('MainBundle:Blog:showArticle.twig', array('article' => $article));

MainBundle/Resources/ config/ views/ Blog/ showArticle.twig Main/ error404.php index.php layout.php

return $this->render('MainBundle:Blog:showArticle.twig', array('article' => $article));

TwigThe flexible, fast, and secure template language for PHP

http://twig-project.org

symfony 1

• templates

symfony 1

• templates

• layouts

symfony 1

• templates

• layouts

• slots

symfony 1

• templates

• layouts

• slots

• components

symfony 1

• templates

• layouts

• slots

• components

• partials

symfony 1

• templates

• layouts

• slots

• components

• partials

• component slots

fewer concepts, more power

Symfony2

• templates

Symfony2

• templates

• slots

Symfony2

• templates

• slots } fewer concepts, more power

<?php $view->extend('MainBundle::layout.php') ?>

<?php foreach ($people as $person): ?>

<?php $view->render( 'MainBundle:Person:thumbnail', array('person' => $person) ) ?>

<?php endforeach; ?>

decorate_with()

include_partial()

helpers

<?php $view['slots']->set('title', 'Hi!') ?>

<?php $view['slots']->start('sidebar') ?>

My awesome sidebar!

<?php $view['slots']->stop() ?>

<?php $view['slots']->set('title', 'Hi!') ?>

<?php $view['slots']->start('sidebar') ?>

My awesome sidebar!

<?php $view['slots']->stop() ?>

helpers are objects

$view['javascripts']->add('script.js');echo $view['javascripts'];

echo $view['assets']->getUrl('logo.gif');

echo $view['router']->generate( 'person_show', array('username' => $username));

$view['actions']->output('MainBundle:Search:form');

use_javascript()

include_javascripts()

public_path()

$view['actions']->output('MainBundle:Search:form');url_for()

include_component()

dependency injection

lazy objects

if you want me to fooyou better give me the foo-er“

”Saturday, October 2, 2010

class User{ protected $session;

public function __construct(Session $session) { $this->session = $session; }}

public function __construct() { $this->session = Session::factory(); }}

$session = $this->getMock('Session') ->expects($this->any()) ->method('get') ->with('foo') ->will($this->returnValue('bar'));

// inject the mock object!$user = new User($session);

$this->assertEquals('bar', $user->getSessionVar('foo'));

dependency injection container

• a configuration layer

• creates a "container" that manages the creation of objects

• “teach” the container

• using xml, yaml, php, ini(or some combination)

services: session: class: Session

user: class: User arguments: - @session

public function getUserService(){ if (isset($this->shared['user'])) return $this->shared['user'];

$user = new User( $this->getSessionService() );

$this->shared['user'] = $user;

return $user;}

// get one service by name$container->get('user');

// find many services by "tag"$c->findTaggedServiceIds('my_tag');

services: foo_helper: class: Foo tags: - name: my_tag

container parameters

parameters: foo.class: Foo

services: foo: class: %foo.class%

dependency injection extensionssemantic configuration

doctrine.dbal: dbname: xxx user: xxx password: xxx

doctrine.orm: ~

awesome developer tools

Web Debug Toolbar

Web Profiler

Questions?

OpenSky is Hiring!http://engineering.shopopensky.com

Please contact me if you're interested.

OpenSky is Hiring!http://engineering.shopopensky.com

Please contact me if you're interested.

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A Practical Introduction to Symfony2

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