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Get A Year With Symfony Writing healthy, reusable Symfony2 PDF

By Matthias Noback

You recognize now the way to create a Symfony2 software, with routing, controllers, entities or records, Twig templates and perhaps a few unit assessments. yet after those easy steps, a few matters will increase about...
The reusability of your code - How in the event you constitution your code to make it reusable in a destiny undertaking? or maybe within the comparable venture, yet with a special view or in a console command?
The quality of the inner API you may have knowingly or unknowingly created - What are you able to do to make sure that your staff participants will comprehend your code, and should use it within the means it used to be intended for use? how are you going to make your code versatile sufficient for use in events such as the only you wrote it for?
The point of security of your program - Symfony2 and Doctrine appear to instantly make you invulnerable for recognized assaults in your internet software, like XSS, CSRF and SQL injection assaults. yet are you able to thoroughly depend upon the framework? And what steps if you take to mend the various ultimate matters?

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3 Exception handling It is not unlikely that during the long journey from request to response some kind of an error or exception occurs. By default, the kernel is instructed to catch any exception and even then it tries to find an appropriate response for it. As we already saw, the entire request handling gets wrapped in a try/catch block: public function handle( Request $request, $type = HttpKernelInterface::MASTER_REQUEST, $catch = true ) { try { return $this->handleRaw($request, $type); } catch (\Exception $e) { if (false === $catch) { throw $e; } return $this->handleException($e, $request, $type); } } When $catch equals true, the handleException() method is called and is expected to create a response.

End() ; return $treeBuilder; } } There is one public method: getConfigTreeBuilder(). This method should return a TreeBuilder instance which is a builder you use to describe all configuration options, including their validation rules. Creating a config tree starts with defining a root node: $rootNode = $treeBuilder->root('name_of_bundle'); The name of the root node should be the name of the bundle, without “bundle”, but lower-cased and with underscores. So the node name for MatthiasAccountBundle will be matthias_account.

Optional constructor arguments In case your service’s class knows how to work with a logger, it may have an optional constructor argument for it: Service patterns 34 use Symfony\Component\EventDispatcher\EventDispatcherInterface; use Psr\Log\LoggerInterface; class AuthenticationListener { private $eventDispatcher; private $logger; public function __construct( EventDispatcherInterface $eventDispatcher, LoggerInterface $logger = null ) { $this->eventDispatcher = $eventDispatcher; $this->logger = $logger; } } For constructor arguments that should be either an object of the given class/interface, or nothing, you can use the default value null.

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