Symfony components in the wild, PHPNW12

Symfony components in

the wild Jakub Zalas

o  Remembers symfony 1.0 (2007)

o  Open Source contributor

o  BDD advocate

o  Works at Sensio Labs UK

o  ZCE & Sensio Labs Certi"ed Symfony Developer

Who am I?

o  Twitter: @jakub_zalas

o  Blog: http://zalas.eu

o  Github: @jakzal

What is Symfony?

First, Symfony2 is a reusable set

of standalone, decoupled, and cohesive

PHP components

that solve common web development problems.

Then, based on these components, Symfony2 is also a full-stack web framework.

http://fabien.potencier.org/article/49/what-is-symfony2 http://www.sxc.hu/photo/1197009

Why does it matter?

* 76% of statistics found on the Internet is made up

http://www.sxc.hu/photo/1223174

Reinventing the wheel

http://flic.kr/p/Mu9m2

Maintenance hell


Symfony components

Finder Process

Console HttpFoundation

ClassLoader

Routing HttpKernel

EventDispatcher

DependencyInjection

Security

CssSelector

DomCrawler BrowserKit

Yaml

Con"g

Locale

Serializer

Templating

Translation

OptionsResolver

Form

Filesystem

Validator


HttpFoundation


use Symfony\Component\HttpFoundation\Request;

use Symfony\Component\HttpFoundation\Response;

$request = Request::createFromGlobals();

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

$message = "Hello $name!";

$response = new Response($message, 200);

$response->headers->set('X-REQUEST-NAME', $name);

$response->headers->setCookie(new Cookie('phpnw', $name));

$response->send();




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

$message = "Hello $name!";


$response->headers->set('X-REQUEST-NAME', $name);

$response->headers->setCookie(new Cookie('phpnw', $name));

$response->send();

$request->request

$request->query

$request->server

$request->files

$request->cookies

$request->headers

$request->attributes


$session = $request->getSession();

if ($session->has('referrer')) {

$referrer = $session->get('referrer');

return new RedirectResponse($referrer);

}

if ($session->hasFlash('notice')) {

return new Response($session->getFlash('notice'));

} else {

$session->setFlash('notice', 'Hello again!');

return new Response('Foo')

}


$date = getPageUpdatedAtById($request->query->get('id'));

$response = new Response();

$response->setPublic();

$response->setLastModified($date);

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

return $response;

}

// else do heavy processing to render the page

•  is there HTTPS in the server vars? is it 'on' or '1'? •  or is there SSL_HTTPS header? is it 'on' or '1'? •  or is there X_FORWARDED_PROTO header set to 'https'

How to check if a request is made over ssl?

if ($request->isSecure()) { // we're fine }

Routing


use Symfony\Component\Routing\RouteCollection;

use Symfony\Component\Routing\Route;

$routes = new RouteCollection();

$routes->add('hello', new Route('/hello/{name}', array(

'controller' => 'HelloController'

)));

$routes->add('homepage', new Route('/', array(

'controller' => 'HomepageController'

)));

use Symfony\Component\Routing\Matcher\UrlMatcher;

use Symfony\Component\Routing\RequestContext;

$matcher = new UrlMatcher($routes, new RequestContext());

$parameters = $matcher->match('/');

var_dump($parameters);

// array(

// 'controller' => 'HomepageController',

// '_route' => 'homepage'

// )




$parameters = $matcher->match('/hello/PHPNW');


// array(

// 'controller' => 'HelloController',

// 'name' => 'PHPNW',

// '_route' => 'hello'

// )






// array(




// )


'controller' => 'HelloController'

)));


$routes->add('hello', new Route(

'/hello/{name}',

array('controller' => 'HelloController'),

array('name' => '^[a-zA-Z]+$')

));




// array(




// )

use Symfony\Component\Routing\Exception;


$routes->add('hello', new Route(

'/hello/{name}',

array('controller' => 'HelloController'),

array('name' => '^[a-zA-Z]+$')

));


try {

$matcher->match('/hello/PHPNW12');

} catch (Exception\ResourceNotFoundException $exception) {

die('Resource not found');

}

use Symfony\Component\Routing\Generator\UrlGenerator;

$generator = new UrlGenerator(

$routes, new RequestContext()

);

// "/hello/PHPNW"

$url = $generator->generate(

'hello', array('name' => 'PHPNW')

);

// "http://localhost/hello/PHPNW"

$url = $generator->generate(

'hello', array('name' => 'PHPNW'), true

);

EventDispatcher


use Symfony\Component\EventDispatcher\EventDispatcher;

use Symfony\Component\EventDispatcher\Event;

$dispatcher = new EventDispatcher();

$dispatcher->addListener(

'received_hello',

function (Event $event) {

printf("Hello from listener 1!\n");

}

);


'received_hello',



}

);

printf("Hello!\n");

$dispatcher->dispatch('received_hello', new Event());

Hello!

Hello from listener 1!




'received_hello',



},

0

);


'received_hello',



},

10

);

printf("Hello!\n");


Hello!





'received_hello',



$event->stopPropagation();

}

);


'received_hello',



}

);

printf("Hello!\n");


Hello!


$app = new \Silex\Application();

$app->after(

function (Request $request, Response $response) {

// http://phpnw.dev/?hello=1

if ($request->query->get('hello') === '1') {

$content = str_replace(

'</body>',

'Hello!!</body>',

$response->getContent()

);

$response->setContent($content);

}

}

);

$app->run();

// Silex/src/Silex/Application.php:304

public function after($callback, $priority = 0)

{

$this['dispatcher']->addListener(

SilexEvents::AFTER,

function (FilterResponseEvent $event)

use ($callback) {

call_user_func(

$callback,

$event->getRequest(),

$event->getResponse()

);

},

$priority

);

}

// Silex/src/Silex/Application.php:603

$this['dispatcher']->dispatch(SilexEvents::AFTER, $event);

HttpKernel


$resolver = new ControllerResolver();

$httpKernel = new HttpKernel($dispatcher, $resolver);

$request = Request::create('/hello/PHPNW')

$response = $httpKernel->handle($request);

echo $response;

HTTP/1.0 200 OK

Cache-Control: no-cache

Date: Sat, 06 Oct 2012 14:32:14 GMT

Hello PHPNW




KernelEvents::REQUEST,

function (GetResponseEvent $event) use ($matcher) {

$request = $event->getRequest();

$pathInfo = $request->getPathInfo();

// array contains '_controler', 'name', '_route'

$parameters = $matcher->match($pathInfo);

$request->attributes->add($parameters);

}

);

use Symfony\Component\Routing\RouteCollection;

use Symfony\Component\Routing\Route;



'_controller' => 'PhpnwController::hello'

)));

$routes->add('homepage', new Route('/', array(

'_controller' => 'PhpnwController::homepage'

)));



class PhpnwController

{

public function hello(Request $request, $name)

{

return new Response('Hello '.$name.PHP_EOL);

}

public function homepage(Request $request)

{

return new Response('Home sweet home'.PHP_EOL);

}

}

$response = $httpKernel->handle(Request::create('/bye'));

PHP Fatal error: Uncaught exception 'Symfony\Component\Routing\Exception\ResourceNotFoundException' in /home/vagrant/Projects/WildComponents/vendor/symfony/routing/Symfony/Component/Routing/Matcher/UrlMatcher.php:81


KernelEvents::EXCEPTION,

function (GetResponseForExceptionEvent $event) {

$message = $event->getException()->getMessage();


$event->setResponse($response);

}

); HTTP/1.0 404 Not Found

Cache-Control: no-cache

Date: Sat, 06 Oct 2012 09:01:02 GMT

Unable to find the controller for path "/bye". Maybe you forgot to add the matching route in your routing configuration?

Console


use Symfony\Component\Console\Command\Command;

use Symfony\Component\Console\Input\InputInterface;

use Symfony\Component\Console\Output\OutputInterface;

class HelloCommand extends Command

{

public function configure()

{

// configure the command [...]

}

protected function execute(InputInterface $input, OutputInterface $output)

{

// put your code here [...]

}

}


{

$this->setDescription('Outputs welcome message[...]');

$this->setHelp('Outputs welcome message.');

$this->addArgument(

'name',

InputArgument::OPTIONAL,

'The name to output to the screen',

'World'

);

}

$application = new Application('Demo', '1.0.0');

$application->add(new HelloCommand('hello'));

$application->run();

protected function execute(InputInterface $input,

OutputInterface $output)

{

$name = $input->getArgument('name');

$output->writeln(sprintf('Hello %s!', $name));

}

}


{

// [...]

$this->addOption(

'more',

'm',

InputOption::VALUE_NONE,

'Tell me more'

);

}

protected function execute(InputInterface $input,

OutputInterface $output)

{

$name = $input->getArgument('name');

$output->writeln(sprintf('Hello %s!', $name));

if ($input->getOption('more')) {

$output->writeln('It is really nice to meet you!');

}

}

}

How to start?


// composer.json

{

"require": {

"symfony/http-foundation": "2.1.2"

}

}

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

php composer.phar install

Why Symfony?

•  Good code covered by tests

•  Flexible

•  Secure

•  Stable API (@api annotation)

•  Long term support

•  Outstanding community

•  Wide adoption

Rate my talk: https://joind.in/6945

Thank you!

Interested in training? We're introducing Symfony Components trainings soon:

http://www.sensiolabs.co.uk/training/symfony2.html

Date post:	06-May-2015
Category:	Technology
Upload:	jakub-zalas
View:	2,291 times
Download:	2 times

Symfony components in the wild, PHPNW12

Technology