symfony2 meets drupal

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meets

http://www.flickr.com/photos/nimport_nawak/3404931191

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Fabien Potencier@fabpot

[email protected]

Founder of

Lead developer of Open-Source librariesTwig, Swiftmailer, Silex, Pirum, Sismo, Pimple, Goutte, ...

Symfony founder and lead developer

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Lukas Kahwe Smith@lsmith

[email protected]

Works for in Switzerland

PHP 5.3 Release Manager

Co-lead of PHPCRSymfony2 core contributor

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http://www.flickr.com/photos/dunechaser/160405823

Drupal 8 meets Symfony

How many of you are

PHP developers?

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http://www.flickr.com/photos/dunechaser/142079357

How many of you are

Symfony aware?

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We are both outsiders

We are both quite experiencedPHP developers

We have a rough understandingof the hook paradigm aka the Drupal way

http://www.flickr.com/photos/pictureperfectpose/76138988

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A sad realization

It would take a long time for usto be productive in Drupallet alone work on the core

And everything we learn along the waywould only help us with Drupal

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What others do

Building on top of long establishedOO design patterns

Leverage new PHP language features

and performance improvementsShare code!

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So Drupal is wrong?

No, the question is justif the benefits of doing things differently

outweigh the disadvantages

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Core brain drain

The complexity of the custom code thats used

and the non-standard architecturecombines to create a barrier to entry

for developers new to Drupal(both experienced and novice developers alike).

buytaert.net

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What could be gained

Facilitate the refactoringtowards a framework core

Focus Drupal dev resources on the CMS

Easier integration with other applications

Ensure that the Drupal developer poolcontinues to grow

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A decision was made

While these changes may seem large, and some of them are,

we believe that they will achieve the right balancebetween empowering Drupal's design and architecture,and moving toward more modern, standard,

well-tested code and techniques

to empower a new generation of developers.

buytaert.net

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How to collaborate?

Symfony2 is MIT licensedwhich is GPL compatible

Symfony2 development isvery transparently managed on github.com

We want to ensure Symfony2works for Drupal, phpBB, etc.

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For example ...

Symfony2.0 provides a conceptcalled flash messages to pass messages

to the very next request

drupal_set_message() could be replacedby this if we make it a bit more flexible

Drak, lead of the Zikula CMS, created a PRto address exactly these concerns

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What isSymfony?

http://www.flickr.com/photos/apranihita/141159146/

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http://www.flickr.com/photos/bigpinkcookie/22716359

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Drupal 8 meets Symfony

is...

... a reusable set ofstandalone, decoupled, and cohesivePHP components that solve

common web development problems

http://www.flickr.com/photos/krislitman/493626935

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is...

... an Object-Oriented set of classes

... compatible with PHP 5.3 and later

http://www.flickr.com/photos/krislitman/493626935

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DependencyInjectionEventDispatcher

HttpFoundation

DomCrawler

ClassLoader

CssSelector

HttpKernel

BrowserKitTemplating

Translation

Filesystem

Serializer

ValidatorSecurity

Routing

ConsoleProcessConfig

Finder

Locale

Yaml

Form

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is...

... a full-stack web framework

http://www.flickr.com/photos/krislitman/493626935

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Official websitehttp://symfony.com/

Official repositoryhttps://github.com/symfony/symfony

http://www.flickr.com/photos/28634332@N05/5654415647

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Official websitehttp://symfony.com/components

Official repositorieshttps://github.com/symfony/XXXX

Components

http://www.flickr.com/photos/28634332@N05/5654415647

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Drupal 8 meets Symfony

Mailing-listhttps://groups.google.com/group/symfony2

IRC channelirc://irc.freenode.net/symfony

http://www.flickr.com/photos/28634332@N05/5654415647

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Which Open-Source projects

are already using theSymfony Components?

http://www.flickr.com/photos/maistora/3014414972

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Drupal 8 meets Symfony

Behat - a BDD frameworkConsole, DependencyInjection, EventDispatcher, Finder, Yaml, Config, Translation

Doctrine - an object relational mapper

Console, Yaml

Propel - an object relational mapperConsole, ClassLoader, Yaml

PHPUnit - a PHP unit testing frameworkYaml, (Finder soon?)

Jackalope - a content repository (JCR 170/283)ClassLoader, Console

Developer Tools

http://www.flickr.com/photos/c_r_i_s/77763712

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Drupal 8 meets Symfony

Silex - a micro-frameworkBrowerKit, CssSelector, DomCrawler, EventDispatcher,

HttpFoundation, HttpKernel, Routing, Form, Translation, Validator

PPI 2 - a frameworkClassLoader, HttpFoundation, Routing, Templating

Frameworks

http://www.flickr.com/photos/c_r_i_s/77763712

P d

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Drupal 8 meets Symfony

easybook - a book publishing platformClassLoader, Console, EventDispatcher, Filesystem, Finder, Yaml

Midgard CMS - a content management frameworkuses the full-stack framework

Zikula - ex PostNuke - an application frameworkHttpFoundation, HttpKernel, EventDispatcher,

ClassLoader, DependencyInjection

phpBB - a bulletin board softwareEventDispatcher, and most of them for version 4?

Products

http://www.flickr.com/photos/c_r_i_s/77763712

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Drupal 8 meets Symfony

What aboutDrupal 8?

http://www.flickr.com/photos/aloshbennett/619307160

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Drupal 8 meets Symfony

DependencyInjectionEventDispatcher

HttpFoundation

DomCrawler

ClassLoader

CssSelector

HttpKernel

BrowserKitTemplating

Translation

Filesystem

Serializer

ValidatorSecurity

Routing

ConsoleProcessConfig

Finder

Locale

Yaml

Form

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DependencyInjectionEventDispatcher

HttpFoundation

DomCrawler

ClassLoader

CssSelector

HttpKernel

BrowserKitTemplating

Translation

Filesystem

Serializer

ValidatorSecurity

Routing

ConsoleProcessConfig

Finder

Locale

Yaml

Form

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Drupal 8 meets Symfony

Using the

SymfonyComponents

http://www.flickr.com/photos/35168673@N03/6086229920

Git

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Drupal 8 meets Symfony

$ git clone https://github.com/symfony/Console.git

$ git co v2.0.9

$ git co 2.0

$ git co master

Git

A hi

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$ curl -O https://github.com/symfony/Console/zipball/v2.0.9

$ curl -O https://github.com/symfony/Console/zipball/2.0

$ curl -O https://github.com/symfony/Console/zipball/master

Archives

PEAR

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$ pear channel-discover pear.symfony.com

$ pear install symfony2/Console-2.0.9

PEAR

C

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composer.json

{"require": {

"symfony/console": "2.1.*",

"symfony/http-foundation": "v2.0.9"

}

}

curl -s http://getcomposer.org/installer | php

php composer.phar install

Composer

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Drupal 8 meets Symfony

Symfony Componentscomes with Drupal 8

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Drupal 8 meets Symfony

ClassLoader

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Drupal 8 meets Symfony

http://symfony.com/PSR0

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Drupal 8 meets Symfony

require_once__DIR__.'/src/Symfony/Component/ClassLoader/UniversalClassLoader.php';

use Symfony\Component\ClassLoader\UniversalClassLoader;

$loader=newUniversalClassLoader();$loader->registerNamespaces(array( 'Symfony'=>__DIR__.'/vendor/symfony/src',));

$loader->register();

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$loader->registerPrefixes(array(

'Twig_'=>__DIR__.'/vendor/twig/lib',));

Drupal 8 meets Symfony

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Drupal 8 meets Symfony

The Symfony ClassLoader Componentloads your project classes automatically

if they follow some standard conventions

http://www.flickr.com/photos/ynaffitx/4667769355

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Drupal 8 meets Symfony

HttpFoundation

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Drupal 8 meets Symfony

http://www.flickr.com/photos/deniscollette/6741424757

HTTPHTTP/1.1RFC 2616

http://www.ietf.org/rfc/rfc2616.txt

http://tools.ietf.org/wg/httpbis/

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The Web in action

The User asks for a Resource in a Browser

http://example.com/foo.html

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Drupal 8 meets Symfony

The Web in action

The User asks for a Resource in a Browser

The Browser sends a Request to the Server

GET /foo.html HTTP/1.1Host: example.com

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Drupal 8 meets Symfony

The Web in action

The User asks for a Resource in a Browser

The Browser sends a Request to the Server

The Server sends back a Response to the Browser

HTTP/1.1 200 OKDate: Wed, 15 Oct 2005 07:07:07 GMT

Content-Length: 14Content-Type: text/html

Hello World!

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The Web in action

The User asks for a Resource in a Browser

The Browser sends a Request to the Server

The Server sends back a Response to the BrowserThe Browser displays the Resource to the User

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Drupal 8 meets Symfony

The Client sendsa Request to the Server

The Server sends backa Response to the Client

Request

GET /foo.html HTTP/1.1Host: example.com

Response

HTTP/1.1 200 OKDate: Wed, 15 Oct 2005 07:07:07 GMTContent-Length: 14Content-Type: text/html

Hello World!

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Request

GET /foo.html HTTP/1.1

Host: example.com

http://www.flickr.com/photos/splorp/64027565

Request

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session_start();

$name=$_GET['name'];// $_POST, $_FILE, $_COOKIE, ...

echo $_SESSION['name'];

$method=$_SERVER['REQUEST_METHOD'];

Drupal 8 meets Symfony

Request

GET /foo.html HTTP/1.1Host: example.com

Request

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Drupal 8 meets Symfony

$clientIp=$_SERVER['REMOTE_ADDR'];

Request

GET /foo.html HTTP/1.1Host: example.com

Request

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Drupal 8 meets Symfony

if (isset($_SERVER['HTTP_CLIENT_IP'])) {return$_SERVER['HTTP_CLIENT_IP'];

}

if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) { $ips=explode(',', $_SERVER['HTTP_X_FORWARDED_FOR'], 2);

returnisset($ips[0]) ? trim($ips[0]) : '';}

return$_SERVER['REMOTE_ADDR'];

Request

GET /foo.html HTTP/1.1Host: example.com

Request

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Drupal 8 meets Symfony

if ($trustProxy) {if (isset($_SERVER['HTTP_CLIENT_IP'])) {

return$_SERVER['HTTP_CLIENT_IP'];}

if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) { $ips=explode(',', $_SERVER['HTTP_X_FORWARDED_FOR'], 2);

returnisset($ips[0]) ? trim($ips[0]) : '';}

}

return$_SERVER['REMOTE_ADDR'];

Request

GET /foo.html HTTP/1.1Host: example.com

Request

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http://www.flickr.com/photos/viamoi/3338093351

Not Object-Oriented

Low-level abstraction only

Singleton like

Not Object-Oriented

Request

GET /foo.html HTTP/1.1Host: example.com

Request

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Drupal 8 meets Symfony

use Symfony\Component\HttpFoundation\Request;

$request=Request::createFromGlobals();

$request=Request::create('/hello.html', 'GET');

$request->overrideGlobals();

Request

GET /foo.html HTTP/1.1Host: example.com

Request

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Drupal 8 meets Symfony

$request->query->get('name', 'Default');

$request->getSession()->get('name');

$request->getPathInfo();

$request->getClientIp();

Request::trustProxyData();

Request

GET /foo.html HTTP/1.1Host: example.com

Response

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Response

HTTP/1.1 200 OKDate: Wed, 15 Oct 2005 07:07:07 GMTContent-Length: 14Content-Type: text/html

Hello World!

http://www.flickr.com/photos/splorp/64027565

Response

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Drupal 8 meets Symfony

p

HTTP/1.1 200 OKDate: Wed, 15 Oct 2005 07:07:07 GMTContent-Length: 14Content-Type: text/html

Hello World!

header('HTTP/1.0 404 Not Found');

header('Content-Type: text/html; charset=UTF-8');

setcookie('name', $name);

$_SESSION['name'] ='Fabien';echo'Hello '.$name;

Response

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Drupal 8 meets Symfony

http://www.flickr.com/photos/viamoi/3338093351

Low-level abstraction only

Singleton like

Does not play well with the CLI

Not Object-Oriented

p

HTTP/1.1 200 OKDate: Wed, 15 Oct 2005 07:07:07 GMTContent-Length: 14Content-Type: text/html

Hello World!

Response

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Drupal 8 meets Symfony

use Symfony\Component\HttpFoundation\Response;

$response=newResponse('Not Found', 404, array('Content-Type'=>'text/plain'));$response=newResponse();

$response->setContent('Hello World');

$response->send();

p

HTTP/1.1 200 OKDate: Wed, 15 Oct 2005 07:07:07 GMTContent-Length: 14Content-Type: text/html

Hello World!

Response

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Drupal 8 meets Symfony

use Symfony\Component\HttpFoundation\StreamedResponse;

$response=newStreamedResponse(function () { echo'foo'; flush();

echo'bar';});$response->send();

p

HTTP/1.1 200 OKDate: Wed, 15 Oct 2005 07:07:07 GMTContent-Length: 14Content-Type: text/html

Hello World!

Response

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Drupal 8 meets Symfony

$headers=$response->headers;

$headers->set( 'Content-Disposition', $headers->makeDisposition(

ResponseHeaderBag::DISPOSITION_ATTACHMENT, 'foo.pdf'));

p

HTTP/1.1 200 OKDate: Wed, 15 Oct 2005 07:07:07 GMTContent-Length: 14Content-Type: text/html

Hello World!

Response

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$response->prepare($request);

p

HTTP/1.1 200 OKDate: Wed, 15 Oct 2005 07:07:07 GMTContent-Length: 14Content-Type: text/html

Hello World!

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Drupal 8 meets Symfony

SessionManagement

http://www.flickr.com/photos/tomvu/5371659662

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Drupal 8 meets Symfony

The Symfony HttpFoundation Componentdefines a feature-full object-oriented layer

for the HTTP messages

http://www.flickr.com/photos/ynaffitx/4667769355

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Drupal 8 meets Symfony

It replaces PHP native global variables and functionsto allow writing better, more secure, and more testable code

http://www.flickr.com/photos/ynaffitx/4667769355

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Drupal 8 meets Symfony

Routing

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Drupal 8 meets Symfony

use Symfony\Component\Routing\Route;

$route=newRoute('/node/{id}', array( '_controller'=>'SomeClass::someMethod'));

use Symfony\Component\Routing\RouteCollection;

$routes=newRouteCollection();

$routes->add('node', $route);

f \ \ i \

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use Symfony\Component\Routing\RequestContext;use Symfony\Component\Routing\Matcher\UrlMatcher;

$matcher=newUrlMatcher($routes, newRequestContext());

$attributes=$matcher->match('/node/12');$attributes=$matcher->match($request->getPathInfo());

print_r($attributes);

array( '_route' =>'node',

'id' =>12, '_controller'=>'SomeClass::someMethod',);

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use Symfony\Component\Routing\Generator\UrlGenerator;

$generator=newUrlGenerator($routes, $context);

echo$generator->generate('node', array('id'=>12));

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Drupal 8 meets Symfony

The Symfony Routing Componentdecouples the look of URLs

from the code that handle them

http://www.flickr.com/photos/ynaffitx/4667769355

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Drupal 8 meets Symfony

EventDispatcher

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Drupal 8 meets Symfony

use Symfony\Component\EventDispatcher\EventDispatcher;

$dispatcher=newEventDispatcher();

$callable=function (Event$event) { // do something

};$dispatcher->addListener('event_name', $callable);

$dispatcher->dispatch('event_name', newEvent());

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Drupal 8 meets Symfony

The Symfony EventDispatcher Componentimplements a lightweight version

of the Observer design pattern

http://www.flickr.com/photos/ynaffitx/4667769355

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Drupal 8 meets Symfony

HttpKernel

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Drupal 8 meets Symfony

Request Response

HTTP/1.1 200 OKDate: Wed, 15 Oct 2005 07:07:07 GMTContent-Length: 14Content-Type: text/html

Hello World!

GET /foo.html HTTP/1.1Host: example.com

http://www.flickr.com/photos/-bast-/349497988

The web in action

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Drupal 8 meets Symfony

The web in action

The User asks for a Resource in a BrowserThe Browser sends a Request to the Server

Symfony gives the Developer a Request Object

The Developerconverts the Request Object to a Response Object

The Server sends back a Response to the Browser

The Browser displays the Resource to the User

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namespace Symfony\Component\HttpKernel;

interface HttpKernelInterface{ /**

* @return Response A Response instance*/

functionhandle(Request$request, $type=self::MASTER_REQUEST, $catch=true);}

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Drupal 8 meets Symfony

Request ResponseWorkflow

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Drupal 8 meets Symfony

Request request

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Drupal 8 meets Symfony

Request Responseresponse

response?

request

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Drupal 8 meets Symfony

Request resolvecontrollerrequest

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Drupal 8 meets Symfony

namespace Symfony\Component\HttpKernel\Controller;

interface ControllerResolverInterface{

functiongetController(Request$request);

functiongetArguments(Request$request, $controller);}

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Drupal 8 meets Symfony

Request controllerresolvecontrollerrequest

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Drupal 8 meets Symfony

Request controllerresolvecontrollerresolve

argumentsrequest

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Drupal 8 meets Symfony

RequestCall

Controllercontrollerresolve

controllerresolve

argumentsrequest

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Drupal 8 meets Symfony

Request ResponseresponseCall

Controllercontrollerresolve

controllerresolve

argumentsrequest

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Drupal 8 meets Symfony

Request ResponseresponseCall

Controllercontroller

view

resolvecontroller

resolveargumentsrequest

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Drupal 8 meets Symfony

Request Responseresponse

expection

exception

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Drupal 8 meets Symfony

Request Response

terminate

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Drupal 8 meets Symfony

CallController

Sub-Request

request

sub-response content

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Drupal 8 meets Symfony

Request ResponseresponseCall

Controller

response?

expectionSub-Request

terminate

controller

view

resolvecontroller

resolveargumentsrequest

exceptionsub-response content

$ t R t C ll ti ()

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Drupal 8 meets Symfony

$routes=newRouteCollection();$routes->add('hello', newRoute('/hello', array('_controller'=> function (Request$request) {

returnnewResponse(sprintf("Hello %s", $request->get('name')));})));

$request=Request::createFromGlobals();

$matcher=newUrlMatcher($routes, newRequestContext());

$dispatcher=newEventDispatcher();$dispatcher->addSubscriber(newRouterListener($matcher));

$resolver=newControllerResolver();$kernel=newHttpKernel($dispatcher, $resolver);$kernel->handle($request)->send();

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Drupal 8 meets Symfony

Symfonybuilt-inlisteners

http://www.flickr.com/photos/c_r_i_s/67306260

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Drupal 8 meets Symfony

$handler=function ($exception) {returnnewResponse($exception->getMessage(), 500);

});

$dispatcher->addSubscriber(newExceptionListener($handler));

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$handler=function ($exception) { $handler=newExceptionHandler();

return$handler->createResponse($exception);

});

$dispatcher->addSubscriber(newExceptionListener($handler));

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Drupal 8 meets Symfony

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Drupal 8 meets Symfony

The default HttpKernel implementationmakes Drupal interoperable with

any other software using the same

http://www.flickr.com/photos/ynaffitx/4667769355

HTTP

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Drupal 8 meets Symfony

http://www.flickr.com/photos/cmogle/2947179118

HTTP

Testing

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Drupal 8 meets Symfony

use Symfony\Component\HttpKernel\Client;

$client=newClient($kernel);

$client->request('GET', '/hello/Fabien');

$response=$client->getResponse();

$this->assertEquals(200, $response->getStatusCode());

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Drupal 8 meets Symfony

use Symfony\Component\HttpKernel\Client;

$client=newClient($kernel);

$crawler=$client->request('GET', '/hello/Fabien');

$nodes=$crawler->filter('h1:contains("Fabien")');

$this->assertCount(1, $nodes);

HTTP

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http://www.flickr.com/photos/laserstars/908946494 Drupal 8 meets Symfony

Caching

Expiration

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Expiration

Cache-Control

Expires

Validation

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Validation

Last-ModifiedIf-Modified-Since

ETagIf-None-Match

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Drupal 8 meets Symfony

$response->setTtl(10);$response->setClientTtl(10);

// get the last modified date as fast as you can

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Drupal 8 meets Symfony

// get the last modified date as fast as you can$lastModified=...;

$response=newResponse();$response->setLastModified($lastModified);

if ($response->isNotModified($request)) {

return$response;}

// do the expensive work$response->setContent(...);

return$response;

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Expiration

wins overValidation

http://www.flickr.com/photos/hoyvinmayvin/4672922637

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$kernel=newHttpKernel($dispatcher, $resolver);

$kernel=newHttpCache($kernel, newStore($cacheDir));

Varnish

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Varnish

The HTTPaccelerator

http://www.flickr.com/photos/stuckincustoms/3232133635

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Drupal 8 meets Symfony

Using the default HttpKernelallows Drupal to benefit from

the many built-in features

http://www.flickr.com/photos/ynaffitx/4667769355

Edge

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g

SideIncludes

ESI

http://www.w3.org/TR/esi-lang

h"p://www.flickr.com/photos/bored-now/2264811719

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Drupal 8 meets Symfony

HTTP Validation

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Drupal 8 meets Symfony

HTTP Expiration

HTTP Validation

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HTTP Expiration

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Drupal 8 meets Symfony

CallController

Sub-Request

request

sub-response content

HTTP Expiration

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Drupal 8 meets Symfony

GET /foo HTTP/1.1Host: foo.org

GET /foo HTTP/1.1Host: foo.org

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GET /bar HTTP/1.1Host: foo.org

Lorem

ipsum

dolor

HTTP/1.1 200 OKC-C: s-maxage=600

Loremipsum

dolor

HTTP/1.1 200 OKC-C: s-maxage=5

Loremipsum

dolorsitamet,

Lorem

ipsum

dolor

HTTP/1.1 200 OK

GET /fooC-C: s-maxage=600

Lor

GET /barC-C: s-maxage=5

Lorem

GET /foo HTTP/1.1Host: foo.org

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Loremipsum

dolorsitamet,

Lorem

ipsum

dolor

HTTP/1.1 200 OK

GET /fooC-C: s-maxage=600

Lor

GET /barC-C: s-maxage=5

Lorem

GET /foo HTTP/1.1Host: foo.org

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GET /bar HTTP/1.1Host: foo.org

Loremipsum

dolor

HTTP/1.1 200 OKC-C: s-maxage=5

Loremipsum

dolorsitamet,

Lorem

ipsum

dolor

HTTP/1.1 200 OK

GET /fooC-C: s-maxage=600

Lor

GET /barC-C: s-maxage=5

Lorem

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$kernel=newHttpCache( $kernel, newStore($cacheDir),

newEsi());

Varnish

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Drupal 8 meets Symfony

http://www.flickr.com/photos/stuckincustoms/3232133635

Varnish

The HTTPaccelerator

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Drupal 8 meets Symfony

The Symfony HttpKernel Componentprovides the building blocks

to create flexible, extensible, and scalable

HTTP-based frameworks

http://www.flickr.com/photos/ynaffitx/4667769355

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The Symfony HttpKernel Componentleverages the HTTP specification

to make integration between projects easy

http://www.flickr.com/photos/ynaffitx/4667769355

http://symfony.com/components

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Drupal 8 meets Symfony

DependencyInjectionEventDispatcher

HttpFoundation

DomCrawler

ClassLoader

CssSelector

HttpKernel

BrowserKit TemplatingTranslation

Filesystem

Serializer

ValidatorSecurity

Routing

ConsoleProcess

Config

Finder

Locale

Yaml

Formhttp://www.flickr.com/photos/ecstaticist/3860865429

Silex

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Silex

https://github.com/fabpot/Silexhttp://silex.sensiolabs.org/http://www.flickr.com/photos/linhngan/2715287035

Build your own

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http://fabien.potencier.org/build-a-framework

y

framework

http://www.flickr.com/photos/linhngan/2715287035

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Drupal 8 meets Symfony

http://live.symfony.com/

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Drupal 8 meets Symfony

The Symfony Components provides the low-levelbuilding blocks that you need to build a web product

so that YOU can focus on what matters most for Drupal

http://www.flickr.com/photos/ynaffitx/4667769355

@fabpot@l ith

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@lsmith