This document provides an overview of a presentation about Symfony2. It introduces the two speakers, Lukas Smith and Daniel Kucharski, and discusses what Symfony2 is, its components, frameworks, distributions, ecosystem, and popular bundles. Key applications and libraries that integrate with Symfony2 are also summarized, such as Twig, Assetic, Monolog, Doctrine, JMSSerializer, Guzzle, and the Sonata Project.

1. Welcome to the
Symfony2 World
Lukas Smith Daniel Kucharski
@lsmith @inspiran_be
Saturday, February 2, 13

2. Speakers
Lukas Kahwe Smith
• Developer at Liip AG in Switzerland
• PHP 5.3 co-release-manager,
• Contributing to Doctrine, Symfony,
PHPCR ..
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3. Speakers
Daniel Kucharski
• SAP Business Consultant by day
• PHP enthusiast at night since 2000
• Co-founder of the Vespolina Ecommerce
Project
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4. What is Symfony2?
• Symfony2 is a reusable set of standalone,
decoupled and cohesive PHP components
• Symfony2 is also a full-stack framework
• MIT licensed (permissive, GPL compatible)
• Compliant with PSR-0 , PSR-1, PSR-2, PSR-3
• https://github.com/symfony/symfony
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5. What is Symfony2?
• Approaching 700 contributors
• Most popular PHP project on github.com
• First stable release in July 2011
• LTS release with 5 year support in May 2013
• Used on many big sites: ted.com,
lockerz.com, opensky.com, exercise.com,
wetter.de, stern.de ..
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6. Components
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7. BrowserKit Locale
ClassLoader OptionsResolver
Config Process
Console PropertyAccess
CssSelector Routing
DomCrawler Security
DependencyInjection Serializer
EventDispatcher Stopwatch
Filesystem Templating
Finder Translation
Form Validator
HttpFoundation Yaml
HttpKernel
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8. Yaml
• Easily parse and write YAML files
• Implements most of the YAML 1.2 spec
use SymfonyComponentYamlParser;
$yaml = new Parser();
$string = file_get_contents('foo.yml')
$data = $yaml->parse($string);
# data, inlining, indenting, invalid types, objects
$string = $yaml->dump($data, 2, 4, false, true);
file_put_contents('bar.yml', $string);
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9. Http Foundation
• OO API for HTTP Request + Response
• OO API for Session incl. “flash messages”
• Supports streaming response
$request = Request::create('/?foo=bar', 'GET');
echo $request->getPathInfo();
$resp = JsonResponse::create($data, 200);
$hdrs = array('Content-Type' => 'text/plain');
$resp = new StreamingResponse($callback, 404, $hdrs);
$resp->send();
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10. HTTP Kernel
• PHP level CGI interface
• Eases integration between Symfony2, Silex,
Drupal8, ezPublish5, Laravel4 .. applications
interface HttpKernelInterface
{
const MASTER_REQUEST = 1;
const SUB_REQUEST = 2;
public function handle(
Request $request,
$type = self::MASTER_REQUEST,
$catch = true
);
}
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11. HTTP Kernel
use SymfonyComponentHttpFoundationRequest;
// env: prod, debug: false
$kernel = new AppKernel('prod', false);
// wrap the kernel for ESI enabled HTTP caching
$kernel = new AppCache($kernel);
// create the request from the super globals
$request = Request::createFromGlobals();
// convert request into a response
$response = $kernel->handle($request);
// send response content to the client
$response->send();
// event fired after browser has received response
$kernel->terminate($request, $response);
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12. Component usage
Frameworks / Applications Libraries / Components
Drupal 8 Doctrine
ezPublish 5 Assetic
Laravel 4 Guzzle
phpBB 3.5 PHPUnit
PPI Behat
Silex Goutte
shopware Jackalope
.. ..
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13. Symfony2 Framework
• HTTP framework 1st , MVC framework 2nd
• Very extensible due to event based request
processing and dependency injection
• Inspired by Django, Spring, Ruby on Rails
• HTTP Caching / ESI / Reversed proxy
• Extensive documentation + debugging tools
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14. Distributions
• Selection of bundles, a default directory / file
structure and default configuration
• Symfony Standard edition
php composer.phar create-project symfony/
framework-standard-edition your-dir
• Symfony CMF Standard edition
• Sonata standard edition
• KNP Rad Edition
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15. What is a Bundle?
Ideally, the minimal glue code necessary to connect
a library with the symfony2 framework (ie. configure
the Dependency Injection Container) plus any required
controller and routes
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16. Core bundles
FrameworkBundle
MonologBundle
AsseticBundle
WebProfilerBundle
TwigBundle
SwiftmailerBundle
SecurityBundle
..
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17. KNPbundles.com
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18. Popular bundles
FOSUserBundle
SonataAdminBundle
FOSRestBundle
StofDoctrineExtensionBundle
KnpMenuBundle
..
NelmioApiDocBundle
JMSDebuggingBundle
LiipCacheControlBundle
KnpRadBundle
..
Saturday, February 2, 13

19. The ecosystem
Core Dependencies Popular Dependencies
Assetic Imagine
Monolog Behat / PHPSpec / Atoum
Doctrine / Propel Buzz / Guzzle
Twig Goutte
Swiftmailer KnpMenu
PHPUnit JMS Serializer
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20. Ecosystem
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21. Composer
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22. Composer
• Dependency manager for PHP
• Based on SUSE Linux dependency resolver
curl -s https://getcomposer.org/installer | php
php composer.phar install
php composer.phar require acme/lib:1.1.* --no-update
php composer.phar update acme/lib
• Register on packagist.org
• Setup your own package index with Satis
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23. Twig
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24. Twig
• Template language implemented in PHP
• Fast: Compiles to PHP and Javascript
• Template inheritance
• Secure: sandbox mode, output escaping
• Easily create new tags, filters and functions
• Many community extensions are available
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25. Twig
{% extends "base.html" %}
{% block title %}Index{% endblock %}
{% block head %}
{{ parent() }}
<style type="text/css">
.important { color: #336699; }
</style>
{% endblock %}
{% block content %}
{% if users|length > 0 %}
<ul>
{% for user in users %}
<li>{{ user.username|e }}</li>
{% endfor %}
</ul>
{% endif %}
{% endblock %}
Saturday, February 2, 13

26. Assetic
• Cleverly handle your JS/CSS web assets
• Inspired by the Python webassets lib
• Assets : Combine, Less, Sass ...
• Filters : Minify,YUICompressor, ..
• Provides ways to handle cache busting
• Build assets on the fly during development
or dump to static files in production
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27. Assetic
{% stylesheets '@AcmeFooBundle/Resources/public/css/*' %}
<link rel="stylesheet" href="{{ asset_url }}" />
{% endstylesheets %}
{% javascripts 'bundles/acme_foo/js/*' filter='yui_js' %}
<script src="{{ asset_url }}"></script>
{% endjavascripts %}
# Assetic Configuration
assetic:
use_controller: false
#java: /usr/bin/java
filters:
cssrewrite: ~
# closure:
# jar: %kernel.root_dir%/java/compiler.jar
# yui_css:
# jar: %kernel.root_dir%/java/yuicompressor-2.4.2.jar
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28. Monolog
• PSR-3 compliant logging library
• Inspired by the Python logbook lib
• Handlers
• StreamHandler, RotatingFileHandler,
NativeMailHandler, MongoDBHandler, ...
• FingersCrossedHandler
• Channels, Formatters, Processors
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29. Monolog
// create a log channel
$log = new Logger('name');
$fileName = 'path/to/your.log';
$handler = new StreamHandler($fileName, Logger::WARNING);
// log everything if there is at least one warning or higher
$log->pushHandler(new FingersCrossedHandler($handler);
$logger->pushHandler(new FirePHPHandler());
$socketName = 'unix:///var/log/httpd_app_log.socket';
$handler = new SocketHandler($socketName);
$handler->setPersistent(true);
$logger->pushHandler($handler, Logger::DEBUG);
// add records to the log
$log->addWarning('Foo');
$log->log(Logger::ERROR, 'Bar');
Saturday, February 2, 13

30. Doctrine
• Hibernate inspired data mapper API
• ORM Object Relational Mapper (SQL)
• Object Document Mapper (CouchDB,
MongoDB, PHPCR, OrientDB, ..)
• DBAL / Migrations / Fixtures
• Annotations, Cache, Inflector, Lexer ..
Saturday, February 2, 13

31. JMS Serializer
• (De)serializing on steroids
• Handles nested (recursive) object graphs
• Fully leverage XML/JSON/.. features
• Exclusion strategies for groups, versioning
• Ability to define custom exclusion
strategies and events handlers
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32. JMS Serializer
class BlogPost
{
private $title;
private $content;
private $date;
/* @XmlList(inline = true, entry = "tag") */
private $tags;
/* @Groups({"admins"})
* @XmlAttribute
* @Since("1.1.0") */
private $version;
/* @VirtualProperty
* @SerializedName("slug")
* @XmlAttribute */
public function getSlug() { .. }
..
}
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33. JMS Serializer
// sets the group exclusion strategy
$serializer->setGroups(array(‘admins’));
// sets the version exclusion strategy
// this overrides the group exclusion strategy
// need to define your own class to combine the two
$serializer->setVersion(‘1.2.0’);
$blogPost = new BlogPost($data);
$serializer->serialize($blogPost, 'json');
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34. Bridges
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35. Bridges
TwigBridge
SwiftmailerBridge
MonologBridge
DoctrineBridge
Propel1Bridge
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36. Applications
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37. Symfony CMF
The Symfony CMF project makes it easier for developers
to add CMS functionality to applications built with the
Symfony2 framework. Key development principles for the
provided sets of bundles are scalability , usability ,
documentation and testing .
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38. Symfony CMF
• Follows vision of the decoupled CMS on top of
Symfony2, PHPCR, Create.js
• CMF as target audience are CMS builders:
Drupal 8, ezPublish 5, Symfony2 devs, ..
• Stable release planned for May 2013
• http://cmf.symfony.com
• Demo at http://cmf.liip.ch
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39. A decoupled CMS
• Decoupled storage, business logic, UI layers
• PHPCR is a storage API for CMS, essentially
a tree + versioning enabled document DB
• Symfony2 handles the business logic
• create.js is a glue layer that ties together
RDFa, backbone.js, inline edit + JSON-LD
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40. Vespolina Project
• scalable Ecommerce application
• from a single person store
• to a multi national store.
• Decoupled components which can be used
independently of Symfony2
• Several components will go stable in Q2
• http://www.vespolina-project.org
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41. Vespolina Project
vespolina/vespolinaProductBundle
defining managers a DI service
vespolina/vespolinaProduct
manager & mappings
vespolina/vespolinaCore
base classes & interfaces
Framework agnostic
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42. References
• http://fabien.potencier.org/article/49/what-is-symfony2
• http://fabien.potencier.org/article/50/create-your-own-
framework-on-top-of-the-symfony2-components-
part-1
• http://symfony.com/components
• http://cmf.symfony.com/slides/
• https://speakerdeck.com/hhamon/useful-php-
librarieswhy_symfony_cmf.html
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43. Questions?
Please rate this talk on
http://joind.in/talk/view/8074
Saturday, February 2, 13

44. Guzzle
• HTTP client & framework
• Restful web service clients
• Used by Amazon AWS SDK, Drupal 8, ...
• Uses Symfony Event dispatcher
• Service descriptions
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45. Guzzle
use GuzzleHttpClient;
$client = new Client('https://api.github.com');
$request = $client->get('/user')->setAuth('user',
'pass');
// Send the request and get the response
$response = $request->send();
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46. Guzzle
{
"name": "Foo", Service Description
"apiVersion": "2012-10-14",
"baseUrl": "http://api.foo.com",
"description": "Foo is an API",
"operations": {
"GetUsers": {
"httpMethod": "GET",
"uri": "/users",
"summary": "Gets a list of users",
"responseClass": "GetUsersOutput"
},
...
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47. Guzzle
...
"GetUserOutput": { Service Description
"type": "object",
"properties": {
"name": {
"location": "json",
"type": "string"
},
"age": {
"location": "json",
"type": "integer"
...
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48. Guzzle
use GuzzleServiceDescriptionServiceDescription;
$description =
ServiceDescription::factory('service_description.js
on');
$client->setDescription($description);
$command = $client->getCommand('GetUser',
array('id' => 123));
$responseModel = $client->execute($command);
echo $responseModel['age'];
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49. Sonata Project
• Collection of bundles to quickly create an
Admin interface
• Media, News, Notification, Formatter,
I18N,
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