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

By Matthias Noback

You recognize now tips on how 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 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 perhaps within the comparable undertaking, yet with a unique view or in a console command?
The quality of the inner API you have got knowingly or unknowingly created - What are you able to do to make sure that your staff individuals will comprehend your code, and should use it within the approach it used to be intended for use? how will you make your code versatile adequate for use in events reminiscent of the single you wrote it for?
The point of security of your program - Symfony2 and Doctrine appear to immediately make you invulnerable for famous assaults in your internet program, like XSS, CSRF and SQL injection assaults. yet are you able to thoroughly depend upon the framework? And what steps in the event you take to mend the various ultimate matters?

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Xml'); } } But some services can not be defined in a configuration file. They should be defined dynamically, because their name, class, arguments, tags, etc. are not fixed. Definition Manually creating a service definition means creating an instance of Definition, and optionally providing a class name. "> You can make the definition non-public if it only exists as a dependency of other services: $definition->setPublic(false); Arguments When the service requires some constructor arguments, you may set them all at once: Service patterns 48 use Symfony\Component\DependencyInjection\Reference; $definition->setArguments(array( new Reference('logger') // reference to another service true // boolean argument, array( 'table_name' => 'users' ) // array argument ...

Its contents can be used to auto-login a user even when his original session was already destroyed. 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.

4 Sub-requests Maybe you noticed the $type argument of the HttpKernel::handle() method: public function handle( Request $request, $type = HttpKernelInterface::MASTER_REQUEST, $catch = true ) { ... } There are two request types defined as constants in HttpKernelInterface: 1. HttpKernelInterface::MASTER_REQUEST, the master request 2. HttpKernelInterface::SUB_REQUEST, a sub-request For each request to your PHP application, the first request that is handled by the kernel is of the first type, HttpKernelInterface::MASTER_REQUEST.

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