Silex, the microframework
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Standing on the shoulders of giants, Silex is a micro framework built on top of Symfony2 components. It provides an ideal environment for throwing together a simple, single file application. We’ll look at a real example of installing and setting up Silex and creating our first application with full dependency injection, templating and all the other features that you would expect of a modern day PHP framework. This session is recommended for anyone looking to break into the Symfony ecosystem with a simple introduction to a small framework build upon the core components of it’s bigger brother (Symfony2).
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Silex, the microframework
- 2. @blongden
- 10. symfony/routing
- 12. pimple/pimple
- 13. Why Silex?
- 18. alias getcomposer='curl -s https://getcomposer.org/installer | php' alias composer='php composer.phar'
- 26. Routes
- 27. Method, Pattern & Closure
- 30. Dynamic Routes
- 35. Route Assertions
- 37. Providers
- 38. • Service Providers • Controller Providers
- 39. • DoctrineServiceProvider • MonologServiceProvider • SessionServiceProvider • SwiftmailerServiceProvider • TwigServiceProvider • TranslationServiceProvider • UrlGeneratorServiceProvider • ValidatorServiceProvider • HttpCacheServiceProvider • FormServiceProvider • SecurityServiceProvider
- 40. Twig Templates
- 45. Traits
- 47. Forms
- 58. Handling POST
- 72. Http Cache
- 82. wallcoo.net http://www.flickr.com/photos/8ballofwakefield/513907976/ http://weblogs.wxmi.com/news/traffic/dirty-windshield/Highway%20signs.JPG http://plaza.ufl.edu/dianis/images/dna.jpg http://4.bp.blogspot.com/-ucuY9INjqrI/TajciAM3V_I/AAAAAAAAClY/EgdsT_i01Jg/s1600/P1040125.JPG http://www.greatgiddingschool.co.uk/wpimages/wpa87715ae_05_06.jpg http://upload.wikimedia.org/wikipedia/commons/5/5b/Cache_Memory-jurvetson.jpg http://img1.etsystatic.com/003/0/6263865/il_fullxfull.361156505_ghgv.jpg
Editor's Notes
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- This talk contains a lot of code\nKeep up!\n
- OO layer for the HTTP specification\nRequest and Response object\nUploaded files, cookies & sessions\n
- Lightweight implementation of the Observer design pattern\naddListener with event\ndispatch event\n
- Associates a request with the code that will convert it to a response\n
- The engine for Silex and Symfony\nThe building blocks for building a framework\n- Reverse Proxy with caching and ESI\n- Exception Listener\n- Functional Testing\nSimple interface to turn a request into a response\n
- Simple Dependency Injection Container\n50 lines of code\n
- You COULD use Plain Old PHP.\nSingle Page apps\n- Concise\n- Extensible via Pimple\n- Testable abstract Request and Response\n
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- Easy installation\n
- Minimum config required to get you up and running\n
- A tip for people who use composer a lot\n
- Symfony dependencies and versions\n
- Lock file (install specific version)\nAutoload file which we use in our code\n
- Minimum bootstrap\nSet’s composers autoloader and sets up Silex\n
- PHP Development server\nNo apache required before we get started!\n
- No controllers, so all requests will 404.\n
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- How the framework translates your request into the code that is executed\nEffectively maps Request data to Code\n
- Request data & Code\nMethod = HTTP Method\nPattern = URL path\nClosure (anoymous function) = the code\n
- Closure returns a string, or a response object\nGET, POST, PUT, DELETE\n\n
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- This route will only match a Url *with* a name supplied\nParam is passed into the function\n
- The default allows it to match / and optionally {name}\n
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- The results of the convert function passed to Closure\nThis could be an object of a class, for example.\n
- Allow us to add arbitrary conditions to a route before it will match\n
- Contrived example! 2 routes with asserts\n/word matched the first route\n/4 matches the second\n
- Key part of the provided functionality in Silex\n\n
- Service providers are a way of reusing code across controllers\nController Providers are a way of reusing Controllers themselves\n
- These are provided\nThird party to provide Propel, Redis, Mongo, alternative templating engines, Config (XML/JSON/YAML), Gravatar, Memcache, Solr etc.\n
- Silex supports Twig out the box\n
- A few more dependencies - silex is very light on its own\ntwig-bridge optional but adds some convenience methods to Twig\n - path and url for UrlGeneratorServiceProvider\n - trans and transchoice for TranslationServiceProvider\n - set of methods for handling forms in templates (which is what we are using)\n - is_granted for SecurityServiceHelper\n
- Pass a directory for where the templates can be found\nWe’re not actually using twig at this point - just registering\n
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- Is everyone familiar with Traits in PHP 5.4?\n“compiler assisted copy & paste”\n
- All built-in providers have traits to enhance the Application object\nShort array syntax since we know we’re using 5.4!\n
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- We add two line to our dependencies - symfony/form and symfony translation.\n
- The translation provider is required for the default form layout\nSymfony forms are a talk on there own and there’s docs out there\nSplit the services and traits out into a bootstrap file\n
- This looks like too much controller logic\n
- We don’t like fat controllers...\n
- Refactor form code\nmake it more re-usable\n
- Reduce code in controllers\n
- form_widget is a twig helper from the symfony bridge\n
- Until the invention of twitter bootstrap all my forms looked like this\n
- Much better\nExcept now all my forms look like this\n
- Any old enough to remember the 1990’s ‘guestbooks’ on websites\n
- In handling POST we need to identify the target URL\n\n
- We do this with another service provider\nAnd an optional Trait\n
- We’re using the trait and registering the provider\n
- We use bind to give this route a name, ‘homepage’.\n
- Template grown a little since the last time we saw it\nEssentially the only change is the form action\n
- Update the method to match\nAdd methods to match to method\nAdd code to validate and save the new entry\nRecap!\n
- This creates a guestbook and adds the new entry\nProblem with instantiating the model in the controller\nWe need to create a service to supply the guestbook\n
- This is a shared service\nFirst time it’s accessed it will create the object\nOnce created it returns the same object\nlazy loading\n
- We then refactor code to make use of the service we defined\nReduce controller responsibility\n
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- Set up a new route with the code to display the messages list\n
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- The render function allows us to use another controller\nThis is excellent for apps using AJAX as calling this route will return the HTML block\n
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- Caches are the reason the web is able to scale\nBrowser caches are good but server cache is fun!\nSymfony has a built in reverse proxy with support for ESI\nOr we can use varnish\n\n
- Small markup language for edge level dynamic content assembly\n
- Inserted into HTML or any text based content as creation\nInterpreted by an intermediary\nAllow for blocks of code to be independently cached from the main page\n
- Because no presentation is complete without a picture of a cloud...\nSymfony components can handle Server Cache and Application as part of the same app\n
- This is the version that caused Silex to render the result of the messages controller\nA small change required to use ESI\n
- We simply update the markup so that the http output contains the ESI directive\n
- Set the cache directory to store static HTML\nSet debug so we can see the headers\n
- Set TTL on responses and Surrogate-Control header for proxy\nrun the http_cache rather than $app->run\nDEMO!\n
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- Go build sandcastles!\n
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