Why Symfony is not scary and how to start using it
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The document introduces Symfony, an open-source PHP web framework. It discusses how to install Symfony using Composer, and provides examples of using key Symfony components like the class loader, routing, dependency injection, and more. The document encourages readers to try Symfony themselves and notes that it can become addictive due to its features and standards compliance.
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Why Symfony is not scary and how to start using it
- 1. Symfony is not scary Valeriy Tuz Inuits
- 3. Is it scary?.. No! Let me try it!!! - Interior - Driving - Engine - Assembly - Service - etc
- 4. Symfony is not scary → Why I love Symfony2
- 5. Just try it! $ curl -s http://getcomposer.org/installer | php $ php composer.phar create-project symfony/framework-standard-edition /var/www/symfony/ $ cd /var/www/symfony/ $ php app/check.php (PHP >= 5.3.2, etc)
- 6. Get Symfony using Composer
- 7. Composer — dependency manager for PHP
- 8. Composer.json{ 'autoload': { 'psr-0': {} } 'name': 'My Project' 'description': 'Very cool one' 'require': { 'php': '>=5.3.3', 'symfony/class-loader': '2.2.*', } }
- 10. Composer: run your PHP script
- 11. Time to look what we've got
- 15. Symfony is both: Full-stack framework Set of decoupled and standalone components
- 16. What are the Symfony components? Symfony components are: – Set of independent components – Each can be used separately – High quality coded, tested and documented Symfony components are just bricks but you're completely responsible to glue them
- 17. The list of Symfony2 components Class loader Config Console CssSelector Dependency Injection Form Event Dispatcher Http Foundation Http Kernel Routing Security Yaml
- 18. What is bundle Bundle — set of files which implement single feature Generate bundle skeleton $ php app/console generate:bundle --namespace=BundleFolder/NameBundle --format=annotation
- 19. What is bundle Templates go there Database mappers Request → Response
- 21. Controller: route URL and name of route
- 22. Controller: template Look for template in: ./Resources/views/Account/index.html.twig
- 23. Controller: get data from DB Fetch Doctrine data manager Get data from repository
- 24. Twig Syntax is very simple: {{ something }} - «Print something» {% something %} - «Do something»
- 25. Twig Print var: {{ var }} «var» can be even an object. With __toString() method public function __toString() { return $this->name; }
- 26. Twig Concise: <?php echo $var ?> → {{ var }} <?php echo htmlspecialchars($var, ENT_QUOTES, 'UTF-8' ?> {{ var |e }}
- 27. Twig: base template example
- 30. Need smth Twig doesn't provide? Just do it!
- 31. Symfony and inspiration How to rescue your PHP project with Symfony2 components http://habrahabr.ru/post/146521/ http://www.slideshare.net/xavierlacot/symfony2- components-to-the-rescue-of-your-php- projects
- 32. Create your own framework on top of Symfony components Recipe from Fabien Potencier http://fabien.potencier.org/article/50/create-your- own-framework-on-top-of-the-symfony2- components-part-1
- 33. Symfony2 components: Console Some examples of usage $ php app/console doctrine:generate:entities Name/MyBundle/Entity/SomeEntity - generates getters and setters for SomeEntity $ php app/console container:debug list of all available services
- 40. Benefits: Only one instance of Mailer which can be used in entire application Centralized configuration of Mailer It can be replaced by another service
- 41. Services container (DIC) Step 1: Create class Step 2: Register it as service by adding to the service container Step 3 ... n: Use it
- 42. Create class
- 44. Let's make example more complicated Step 1: Create one more class Step 2: Inject service to it Step 3: Register it as service as well
- 45. Create class and inject service
- 46. Register new class as service
- 47. Use it
- 48. Let's improve it. Load services from file
- 49. Service.yml become a config file
- 50. Http Kernel
- 51. Request → Response flow
- 52. Events and listeners Event 1 in HttpKernel->handle(): kernel.request I.e. Security listener can throw Response object with 403 Access denied response
- 53. Symfony2 is very kind: For visitors For developers
- 54. Symfony2 is very fast Response class to manage HTTP cache: $response = new Response(); $response->setMaxAge(600); $date = new DateTime(); $date->modify('+600 seconds'); $response->setExpires($date);
- 58. Symfony2 follows standards... Autoloading standard: PSR-0 Basic coding style: PSR-1 Coding style: PSR-2 http://www.php-fig.org/
- 59. … which means: It heavily uses namespaces, OOP, SOA, design patterns, etc http://php.net/manual/en/language.namespaces.php http://en.wikipedia.org/wiki/Software_design_pattern http://en.wikipedia.org/wiki/Service- oriented_architecture
- 60. I'm almost finished Yellow: development Blue: stable Green: maintenance Since 3 June 2013 – long time support for v. 2.3
- 61. Symfony2 bundles
- 62. Try Symfony2 But be careful — it can become addictive from the very first encounter :)