Who am I?Who am I?

Raúl Fraile

@raulfraile

PHP/Symfony2 freelance developer

What do I do?What do I do?

SensioLabsSensioLabsConnectConnect

Why?Why?

app[_dev].phpapp[_dev].php

Front controller

app[_dev].phpapp[_dev].php

// web/app[_env].php

1. require_once __DIR__.'/../app/bootstrap.php.cache';2. require_once __DIR__.'/../app/AppKernel.php';

3. use Symfony\Component\HttpFoundation\Request;

4. $kernel = new AppKernel('dev', true);5. $kernel->loadClassCache();6. $kernel->handle(Request::createFromGlobals())->send();

bootstrap.php.cachebootstrap.php.cache

Several classes/interfaces

in the same file

bootstrap.php.cachebootstrap.php.cache

// app/bootstrap.php.cache

namespace { require_once __DIR__.'/autoload.php'; }

namespace Symfony\Component\DependencyInjection{ interface ContainerAwareInterface { function setContainer(ContainerInterface $container = null); } ...}

bootstrap.php.cachebootstrap.php.cache

Reduces I/O operations

bootstrap.php.cachebootstrap.php.cache

Loads autoload.php

autoload.phpautoload.php// app/autoload.php

use Symfony\Component\ClassLoader\UniversalClassLoader;

$loader = new UniversalClassLoader();$loader->registerNamespaces(array( 'Symfony' => array( __DIR__.'/../vendor/symfony/src', __DIR__.'/../vendor/bundles'), 'Assetic' => __DIR__.'/../vendor/assetic/src',));$loader->registerPrefixes(array( 'Twig_' => __DIR__.'/../vendor/twig/lib',));

ClassLoaderClassLoader

Autoloading of

classes/interfaces in

Symfony2

ClassLoader

ClassLoaderClassLoader

Implements PSR-0

PSR-0PSR-0

Approved by the “Framework Interop Group”

github.com/php-fig/fig-standards/blob/master/accepted/PSR-0.md

PSR-0PSR-0

Fully Qualified Name

Filesystem

\Symfony\Core\Request\Zend\Mail\Message

[vendor_path]/Symfony/Core/Request.php[vendor_path]/Zend/Mail/Message.php

ClassLoaderClassLoader// namespaced class name$namespace = substr($class, 0, $pos);foreach ($this->namespaces as $ns => $dirs) { if (0 !== strpos($namespace, $ns)) { continue; }

foreach ($dirs as $dir) { $className = substr($class, $pos + 1); $file = $dir . DIR_SEPARATOR . str_replace('\\',DIR_SEPARATOR, $namespace) . DIR_SEPARATOR . str_replace('_', DIR_SEPARATOR, $className) . '.php'; if (file_exists($file)) { return $file; } }}

ClassLoaderClassLoader

$loader->findFile( 'Symfony\Component\HttpFoundation\Request');

/Sites/desymfony/app/../vendor/symfony/src/ Symfony/Component/HttpFoundation/Request.php

app[_dev].phpapp[_dev].php

// web/app[_env].php

1. require_once __DIR__.'/../app/bootstrap.php.cache';2. require_once __DIR__.'/../app/AppKernel.php';

3. use Symfony\Component\HttpFoundation\Request;

4. $kernel = new AppKernel('dev', true);5. $kernel->loadClassCache();6. $kernel->handle(Request::createFromGlobals())->send();

AppKernel.phpAppKernel.php// src/AppKernel.php

use Symfony\Component\HttpKernel\Kernel;use Symfony\Component\Config\Loader\LoaderInterface;

class AppKernel extends Kernel{ public function registerBundles() { $bundles = array( new Symfony\Bundle\TwigBundle\TwigBundle(), ... ); return $bundles; }

public function registerContainerConfiguration(LoaderInterface $loader) { $loader->load(__DIR__.'/config/config_'.$this->getEnvironment().'.yml'); }}

app[_dev].phpapp[_dev].php

// web/app[_env].php

1. require_once __DIR__.'/../app/bootstrap.php.cache';2. require_once __DIR__.'/../app/AppKernel.php';

3. use Symfony\Component\HttpFoundation\Request;

4. $kernel = new AppKernel('dev', true);5. $kernel->loadClassCache();6. $kernel->handle(Request::createFromGlobals())->send();

Environment

Debug

AppKernel.phpAppKernel.php

If (true === $debug) {

} else {

Saves initial time (microtime)

display_errors = 1

error_reporting = -1

DebugUniversalClassLoader

}display_errors = 0

app[_dev].phpapp[_dev].php

// web/app[_env].php

1. require_once __DIR__.'/../app/bootstrap.php.cache';2. require_once __DIR__.'/../app/AppKernel.php';

3. use Symfony\Component\HttpFoundation\Request;

4. $kernel = new AppKernel('dev', true);5. $kernel->loadClassCache();6. $kernel->handle(Request::createFromGlobals())->send();

LoadClassCacheLoadClassCache

Objective: map

FQN/filenames of

classes and interfaces

LoadClassCacheLoadClassCache

It is cached in

classes.map and

classes.php.meta

app[_dev].phpapp[_dev].php

// web/app[_env].php

1. require_once __DIR__.'/../app/bootstrap.php.cache';2. require_once __DIR__.'/../app/AppKernel.php';

3. use Symfony\Component\HttpFoundation\Request;

4. $kernel = new AppKernel('dev', true);5. $kernel->loadClassCache();6. $kernel->handle(Request::createFromGlobals())->send();

RequestRequest

HttpFoundation

Component

RequestRequest

OO abstraction of a

HTTP request

RequestRequest

GET /index.php HTTP/1.1␍␊ Host: test.com␍␊ Accept-Language:en;q=0.8␍␊ Accept-Encoding:gzip␍␊ User-Agent: Mozilla/5.0␍␊ ␍␊

$_GET

$_POST

$_COOKIE

$_FILES

$_SERVER

Request

queryrequestcookies

filesserver

headers

getHostgetClientIp

...

app[_dev].phpapp[_dev].php

// web/app[_env].php

1. require_once __DIR__.'/../app/bootstrap.php.cache';2. require_once __DIR__.'/../app/AppKernel.php';

3. use Symfony\Component\HttpFoundation\Request;

4. $kernel = new AppKernel('dev', true);5. $kernel->loadClassCache();6. $kernel->handle(Request::createFromGlobals())->send();

HttpKernelHttpKernel

Wrapper on top of

Request/Response to

handle the dynamic

part of HTTP

HttpKernelHttpKernel

Handles an

environment consisting

of bundles, DIC...

Initialize

bundles and DIC

$kernel->boot()$kernel->boot()

Loads bundles defined in

AppKernel::registerBundles()

$kernel->initializeBundles()$kernel->initializeBundles()

Generated using the

ContainerBuilder from

DependencyInjection

$kernel->initializeContainer()$kernel->initializeContainer()

ContainerBuilderContainerBuilder

// example.com/src/container.phpuse Symfony\Component\DependencyInjection;use Symfony\Component\DependencyInjection\Reference;

$sc = new DependencyInjection\ContainerBuilder(); $sc->register('context', 'Symfony\Component\Routing\RequestContext');$sc->register('matcher', 'Symfony\Component\Routing\Matcher\UrlMatcher') ->setArguments(array($routes, new Reference('context')));

$sc->register('framework', 'Simplex\Framework') ->setArguments(array(new Reference('dispatcher'), new Reference('resolver'))) ;

http://fabien.potencier.org/article/62/create-your-own-framework-on-top-of-the-symfony2-components-part-12

{rootDir}{Environment}

[Debug]ProjectContainer

$kernel->initializeContainer()$kernel->initializeContainer()

For each bundle,

Bundle::build() method is

executed and extensions

are loaded

$kernel->initializeContainer()$kernel->initializeContainer()

For each bundle, the

container is injected and

the boot() method is

executed

$kernel->boot()$kernel->boot()

Goal: Return a Response

object

$kernel->handle()$kernel->handle()

Dispatched as soon as

the request arrives

Event kernel.requestEvent kernel.request

Any listener can return

a Response and 'end'

the execution

Event kernel.requestEvent kernel.request

Used by

FrameworkBundle to set

the _controller value

Event kernel.requestEvent kernel.request

Uses a RouterMatcher

(autogenerated by the

Routing component)

RouterListenerRouterListener

RouterListenerRouterListener

// app/cache/dev/appdevUrlMatcher.php

class appdevUrlMatcher extends RedirectableUrlMatcher{ ... public function match($pathinfo) { ... // _demo_hello if (0 === strpos($pathinfo, '/demo/hello') && preg_match('#^/demo/hello/(?P<name>[^/]+?)$#s', $pathinfo, $m)) { return array_merge($this->mergeDefaults($m, array( '_controller' => 'Acme\\DemoBundle\\Controller\\DemoController::helloAction') ), array( '_route' => '_demo_hello')); } ... }

Must return the controller

+ arguments from

_controller

ControllerResolverControllerResolver

Ties components and

libraries together to make

a MVC framework

FrameworkBundleFrameworkBundle

Moreover...

FrameworkBundleFrameworkBundle

php app/console

FrameworkBundleFrameworkBundle

FrameworkBundleFrameworkBundle// app/console

#!/usr/bin/env php<?php

require_once __DIR__.'/bootstrap.php.cache';require_once __DIR__.'/AppKernel.php';

use Symfony\Bundle\FrameworkBundle\Console\Application;use Symfony\Component\Console\Input\ArgvInput;

$input = new ArgvInput();$env = $input->getParameterOption(array('--env', '-e'), getenv('SYMFONY_ENV') ?: 'dev');$debug = !$input->hasParameterOption(array('--no-debug', ''));

$kernel = new AppKernel($env, $debug);$application = new Application($kernel);$application->run();

Commands

FrameworkBundleFrameworkBundle

assets:install

cache:clear

cache:warmup

container:debug

router:dump-apache

router:debug

Base Controller

FrameworkBundleFrameworkBundle

FrameworkBundleFrameworkBundle

// src/Acme/DemoBundle/Controller/DemoController

namespace Acme\DemoBundle\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\Controller;

class DemoController extends Controller{ public function helloAction($name) { ... }}

And much more: ESI,

WebTestCase,

DataCollectors...

FrameworkBundleFrameworkBundle

Once the controller has

been resolved, this

event is generated

Event kernel.controllerEvent kernel.controller

Any listener can

manipulate the

Controller callable

Event kernel.controllerEvent kernel.controller

This event is called only

if the Controller does

not return a Response

Event kernel.viewEvent kernel.view

Goal: build a Response

object from the return

value of the Controller

Event kernel.viewEvent kernel.view

Allows to modify or

replace the Response

object after its creation

Event kernel.responseEvent kernel.response

Last change to convert a

Exception into a

Response object

Event kernel.exceptionEvent kernel.exception

Extend from KernelEvent

EventsEvents

getRequestType(): MASTER_REQUEST or SUB_REQUEST

getKernel();

getRequest();

HTTP/1.1 200 OK Content-type: text/html Date:Thu, 31 May 2012 17:54:50 GMT

<!DOCTYPE HTML> <html lang="es"> <head> <meta charset="utf-8"> ...

Response

Headers

Version

Content

Status code

Status text

Charset

ResponseResponse

// web/app[_env].php

1. require_once __DIR__.'/../app/bootstrap.php.cache';2. require_once __DIR__.'/../app/AppKernel.php';

3. use Symfony\Component\HttpFoundation\Request;

4. $kernel = new AppKernel('dev', true);5. $kernel->loadClassCache();6. $kernel->handle(Request::createFromGlobals())->send();

app[_dev].phpapp[_dev].php

Send headers and

content

Response::send()Response::send()

Response::send()Response::send()

https://github.com/raulfraile/internals-desymfony2012

DemoDemo

¡Thank you!

http://www.flickr.com/photos/connectirmeli/7233514862

http://www.flickr.com/photos/barretthall/6070677596

http://www.flickr.com/photos/f-oxymoron/5005673112/

PhotosPhotos

Questions?Questions?