Symfony components in the wild [SymfonyCon 2013]

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Symfony components in the wild Jakub Zalas

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What is Symfony?

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http://symfony.com/projects

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Projects on packagist.org 4373 21% 1206 6% 14838 73% Depends on Symfony Depends on Zend Other

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0 100 200 300 400 500 600 700 Bundles Other Symfony Component based projects

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Fixing PHP Debug HttpFoundation Yaml Tools Filesystem Finder Process Stopwatch Web Framework Foundation HttpKernel Routing Templating Data Helpers Conﬁg OptionsResolver PropertyAccess Serializer Patterns DependencyInjection EventDispatcher I18n Intl + Icu Locale Translation Crawlers BrowserKit CssSelector DomCrawler Framework+ ClassLoader Console ExpressionLanguage Form Security Validator

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Fixing PHP

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HttpFoundation

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$_GET $_POST $_SERVER $_COOKIE $_FILES

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use Symfony\Component\HttpFoundation\Request; $request = Request::createFromGlobals(); $request->query $request->request $request->server $request->cookies $request->files $request->headers $request->attributes

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$id = isset($_GET['id']) ? $_GET['id'] : -1; becomes $id = $request->query->get('id', -1);

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use Symfony\Component\HttpFoundation\Request; $request = Request::createFromGlobals(); $request->attributes->set('id', 15); function myController (Request $request) { $id = $request->attributes->get('id'); // do your stuff }

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$expiresAt = new \DateTime('+1hour'); $expiresAt->setTimezone( new \DateTimeZone('UTC') ); $expires = $expresAt->format('D, d M Y H:i:s'); $expires.= ' GMT’; header('X-Event: SymfonyCon'); header('Cache-Control: public'); header('Expires: '.$expires); echo 'Hello!';

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use Symfony\Component\HttpFoundation\Response; $response = new Response('Hello!', 200); $response->headers->set('X-Event', 'SymfonyCon'); $response->setPublic(); $response->setExpires(new \DateTime('+1hour')); $response->send();

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// Somewhere in a controller $id = $request->query->get('id'); $date = $this->getPageUpdatedAtById($id); $response = new Response(); $response->setPublic(); $response->setLastModified($date); if ($response->isNotModified($request)) { return $response; } // else do heavy processing to render the page

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in the wild…

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use Symfony\Component\HttpFoundation\Request; $request = Request::createFromGlobals(); $configuration = new \Proxy\Configuration(); $configuration->setBackend('nousefreak.be'); $proxy = new \Proxy\Proxy(); $proxy->setConfiguration($configuration); $response = $proxy->proxy($request); $response->send(); nousefreak/proxy

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protected function createResponse( GuzzleResponse $gResponse, Request $request ) { $response = new Response( $gResponse->getBody(), $gResponse->getStatusCode() ); foreach ($gResponse->getHeaderLines() as $header) { list($name, $value) = explode(':', $header, 2); $response->headers->set($name, $value); } return $this->prepareResponse($response, $request); } nousefreak/proxy

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Yaml

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use Symfony\Component\Yaml\Yaml; $yaml = << array( // 'username' => 'kuba', // 'password' => '123123' // ) // )

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foo: &foo bar: ~ hello: cześć test: <<: *foo bar: true obj: !!php/object:O:8:"stdClass":1:{s: 5:"title";s:14:"Foo in the bar";}

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in the wild…

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namespace Nelmio\Alice\Loader; use Symfony\Component\Yaml\Yaml as YamlParser; class Yaml extends Base { public function load($file) { ob_start(); $loader = $this; $includeWrapper = function () use ($file, $loader) { return include $file; }; $data = $includeWrapper(); if (true !== $data) { $yaml = ob_get_clean(); $data = YamlParser::parse($yaml); } // ... } } nelmio/alice

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Debug

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\Symfony\Component\Debug\Debug::enable();

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in the wild…

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#!/usr/bin/env php run(); carew/carew

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Hiding dirty details

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Process

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use Symfony\Component\Process\Process; $process = new Process('ls –l'); $exitCode = $process->run(); $output = $process->getOutput();

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$process = new PhpProcess( 'run(); $output = $process->getOutput();

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$printCallback = function ($type, $data) { printf('[%s] %s', $type, $data); }; $process = new Process( 'echo "Symfony"; sleep 2; echo "Con";' ); $process->start($printCallback); // [...] do other stuff while command is running $pid = $process->getPid(); // wait untill it finishes $process->wait();

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in the wild…

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$server = new HttpServer\HttpServer( '/var/www', 'localhost', 8080 ); $server->start(); $contents = file_get_contents( 'http://localhost:8080/example.php' ); $server->stop(); robloach/h6pserver

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class HttpServer extends PhpProcess { // ... public function start($callback = null) { if (false === $php = $this->executableFinder->find()) { throw new \RuntimeException('Unable to find PHP'); } $options = ' -S ' . $this->addr . ':' . $this->port; if (isset($this->documentRoot)) { $options .= ' -t ' . $this->documentRoot; } $this->setCommandLine($php . $options); parent::start($callback); } } robloach/h6pserver

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Making better developers

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EventDispatcher

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Subjects Listeners Event Dispatcher Mailer Listener RegistraAon Dispatcher add listener registraAon.success noAfy registraAon.success call register

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Subjects Listeners Event Dispatcher Mailer Listener RegistraAon Dispatcher add listener registraAon.success noAfy registraAon.success call SMS Listener add listener registraAon.success call register

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use Symfony\Component\EventDispatcher\EventDispatcherInterface; class Registration { private $dispatcher; public function __construct( EventDispatcherInterface $dispatcher ) { $this->dispatcher = $dispatcher; } // ... }

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use Symfony\Component\EventDispatcher\GenericEvent; class Registration { // ... public function register($user) { // register the user ... // dispatch an event if registration was // successful $this->dispatcher->dispatch( 'registration.success', new GenericEvent($user) ); } }

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class MailerListener { private $mailer; private $twig; public function __construct( Mailer $mailer, TwigEngine $twig ) { $this->mailer = $mailer; $this->twig = $twig; } // ... }

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use Symfony\Component\EventDispatcher\GenericEvent; class MailerListener { // ... public function sendMail(GenericEvent $event) { $user = $event->getSubject(); $message = $this->createMessage($user) $this->mailer->send($message); } private function createMessage($user) { return $this->twig->render(/* */); } }

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use Symfony\Component\EventDispatcher\EventDispatcher; $mailerListener = new MailerListener($mailer, $twig); $smsListener = new SmsListener($smsGateway); $dispatcher = new EventDispatcher(); $dispatcher->addListener( 'registration.success', array($mailerListener, 'sendMail') ); $dispatcher->addListener( 'registration.success', array($smsListener, 'sendSms’) ); $registration = new Registration($dispatcher); $registration->register($user);

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in the wild…

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use Phoebe\Connection; use Phoebe\Event\Event; $freenode = new Connection(); $freenode->setServerHostname('irc.freenode.net'); $freenode->setNickname('Phoebe2'); $dispatcher = $freenode->getEventDispatcher(); $dispatcher->addListener( 'irc.received.001', function (Event $event) { $event->getWriteStream()->ircJoin('#symfony'); } ); $events->addSubscriber(new BeerPlugin()); sAl/phoebe

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use Phoebe\Event\Event; use Phoebe\Plugin\PluginInterface; class BeerPlugin implements PluginInterface { public static function getSubscribedEvents() { return [ 'irc.received.PRIVMSG' => array('onMessage', 0) ]; } public function onMessage(Event $event) { $message = $event->getMessage(); if (!$message->matchText('/SymfonyCon/') { return; } $es = $event->getWriteStream(); $es->ircPrivmsg($message->getSource(), 'Hello!'); } } sAl/phoebe

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https://github.com/jakzal/SymfonyConBot sAl/phoebe

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DependencyInjection

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class appDevDebugProjectContainer extends Container { protected function getSymfonyConApiService() { $this->services['symfonycon.api'] = $instance = new SymfonyConApi(); return $instance; } }

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%symfonycon.api.username% %symfonycon.api.key% %symfonycon.api.endpoint%

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in the wild…

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// BehatApplication protected function createContainer( InputInterface $input ) { $container = new ContainerBuilder(); $this->loadCoreExtension( $container, $this->loadConfiguration( $container, $input ) ); $container->compile(); return $container; } behat/behat

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default: extensions: Behat\Symfony2Extension\Extension: mink_driver: true Behat\MinkExtension\Extension: default_session: symfony2 PSS\Behat\Symfony2MockerExtension\Extension: ~ behat/behat

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namespace PSS\Behat\Symfony2MockerExtension; use Symfony\Component\Config\FileLocator; use Symfony\Component\DependencyInjection\ContainerBuilder; use Symfony\Component\DependencyInjection\Loader\XmlFileLoader; use Behat\Behat\Extension\ExtensionInterface; class Extension implements ExtensionInterface { public function load( array $config, ContainerBuilder $container ) { $loader = new XmlFileLoader( $container, new FileLocator(__DIR__.'/services') ); $loader->load('core.xml'); } // ... } behat/behat

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Having healthy relationships

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Routing

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use Symfony\Component\Routing\RouteCollection; use Symfony\Component\Routing\Route; $routes = new RouteCollection(); $routes->add( 'hello', new Route( '/hello/{name}', array('controller' => 'HelloController') ) );

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use Symfony\Component\Routing\Matcher\UrlMatcher; use Symfony\Component\Routing\RequestContext; $context = new RequestContext( '/hello/Poland', 'GET’ ); $matcher = new UrlMatcher($routes, $context); $parameters = $matcher->match('/hello/Poland'); var_dump($parameters); // array( // 'controller' => 'HelloController', // 'name' => 'Poland', // '_route' => 'hello' // )

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use Symfony\Component\HttpFoundation\Request; use Symfony\Component\Routing\Matcher\UrlMatcher; use Symfony\Component\Routing\RequestContext; $request = Request::createFromGlobals(); $context = new RequestContext(); $context->fromRequest($request); $matcher = new UrlMatcher($routes, $context);

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in the wild…

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use Ratchet\App; use Ratchet\Server\EchoServer; $app = new App('localhost', 8080); $app->route('/chat', new MyChat()); $app->route('/echo', new EchoServer(), ['*']); $app->run(); cboden/ratchet

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Leading innovation

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ExpressionLanguage

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use Symfony\Component\ExpressionLanguage\ExpressionLanguage; $language = new ExpressionLanguage(); echo $language->evaluate('1 + 1'); // 2 echo $language->compile('1 + 2'); // (1 + 2)

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echo $language->evaluate( 'life + universe + everything', array( 'life' => 10, 'universe' => 10, 'everything' => 22, ) ); // 42

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class Conference { public function getName() { return 'SymfonyCon'; } } echo $language->evaluate( 'c.getName()', array('c' => new Conference('SymfonyCon')) ); // SymfonyCon

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$language->register( 'reverse', function ($string) { if (!is_string($string)) { return $string; } return sprintf('strrev(%s)', $string); }, function ($arguments, $string) { if (!is_string($string)) { return $string; } return strrev($string); } ); echo $language->evaluate('reverse("SymfonyCon")');

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services: symfonycon.api: class: SymfonyCon\Api arguments: - "@=service('factory').getHttpClient()" new \SymfonyCon\Api( $container->get('factory')->getHttpClient() );

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"@=container.hasParameter('a') ? parameter('a') : 'default'"

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/** * @Route("/post/{id}") * @Cache(lastModified="post.getUpdatedAt()") */ public function showAction(Post $post) { }

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/** * @Route("/post/{id}") * @Method("GET") * @Cache(lastModified="post.getUpdatedAt()") * @ParamConverter("post", class="Sensio:Post") * @Security("has_role('ROLE_USER')") * @Template() * @MyResponseConverter("xml") */ public function showAction(Post $post) { return $post; } Annotation Driven Development

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in the wild…

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/** * @Hateoas\Relation( * "self", * href = "expr('/api/users/' ~ object.getId())" * ) */ class Post {} willdurand/hateoas

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use BCC\EnumerableUtility\Collection; $values = new Collection(array(1, 2, 3)); $values->where(function($item) { return $item % 2; }); $values->select(array( 'i' => 'i * m', 'm' => 2, )); bcc/enumerable-‐uAlity

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It’s Plug & Play!

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Console DomCrawler CssSelector

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Symfony Components •  Make PHP better •  Make your code better •  Make you better

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Thank you! o  I work @SensioLabsUK o  I tweet @jakub_zalas o  I code @jakzal

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Credits •  http://www.sxc.hu/photo/1223174 •  http://www.sxc.hu/photo/338038 •  http://www.sxc.hu/photo/13223 •  http://www.sxc.hu/photo/1092493 •  http://www.sxc.hu/photo/308460 •  http://www.sxc.hu/photo/1412072 •  http://www.sxc.hu/photo/771223 •  http://www.sxc.hu/photo/1178514 •  http://www.sxc.hu/photo/1379212 •  http://www.sxc.hu/photo/1432060 •  http://www.sxc.hu/photo/1115716