Download A Year With Symfony Writing healthy, reusable Symfony2 by Matthias Noback PDF

By Matthias Noback

You recognize now easy methods to create a Symfony2 program, with routing, controllers, entities or records, Twig templates and perhaps a few unit assessments. yet after those simple steps, a few issues will elevate about...
The reusability of your code - How if you constitution your code to make it reusable in a destiny undertaking? or perhaps within the related venture, yet with a special view or in a console command?
The quality of the interior API you might have knowingly or unknowingly created - What are you able to do to make sure that your workforce participants will comprehend your code, and should use it within the means it used to be intended for use? how will you make your code versatile sufficient for use in occasions comparable to the single you wrote it for?
The point of security of your software - Symfony2 and Doctrine appear to instantly make you invulnerable for recognized assaults in your net program, like XSS, CSRF and SQL injection assaults. yet are you able to thoroughly depend on the framework? And what steps for those who take to mend a few of the last concerns?

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Foreach ($taggedServiceIds as $serviceId => $tags) { foreach ($tags as $tagAttributes) { $objectRendererDefinition ->addMethodCall('addRenderer', array( 44 Service patterns $tagAttributes['alias'], $serviceId, )); } } } } Also don’t forget to provide the service container as a constructor argument: Of course, any of the strategies mentioned above can be used with this lazy-loading class (single method call, multiple method calls or argument replacement).

Response, etc. " method="onEvent" /> But in this situation, we don’t know in advance to which events the listener should listen, so these events can not be defined in a configuration file. Luckily - as we saw earlier - we can add tags to service definitions on the fly.

However, there are situations where a service knows how to use another service, but does not actually need it for doing its job. For instance, a service may know how to deal with a logger to log some things for debugging purposes. 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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