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Sometimes you need to make changes to the Response object, after it is returned by your controller, but before it is rendered as output to the client (e.g. the browser). You may want to set some extra response headers, or " completely mess up the content " of the response. You can accomplish this by creating an event listener that listens to the kernel.response event. I give you a sample event listener which changes the Content-Type header in case the requested format is json and the browser’s accepted response format contains "text/html" in that case, at least in my experience, the browser doesn’t render the JSON string as plain text when the status code is 4xx or 5xx. So in these situations, the event listener changes the “ Content-Type ” to “ text/plain ”, to be sure you always get decent output in the browser. Put the event listener in, for example /src/Acme/DemoBundle/EventListener/ResponseListener.php : namespace Acme\DemoBundle\EventListener;...

Hi everyone, Just a quick note about Varnish integration for symfony. I’m sure you have heard of Varnish reverse proxy server. Varnish is a web accelerator written with performance and flexibility in mind. It’s modern architecture gives it a significantly better performance than many of it’s competing products. Varnish store web pages in memory so the web servers don’t have to create the same web page over and over again. The web server only recreate a page when it is changed. Additionally Varnish can serve web pages much faster then any application server is capable of – giving the website a significant speed up. So in first order you may be interested to integrate Varnish to handle pages which don’t require authentication (for myself I’m still not sure if there is any advantage for integrating pages for logged in users): sub vcl_recv { set req.http.Surrogate-Capability = "abc=ESI/1.0"; } sub vcl_fetch { if (beresp.http.Surrogate-Control ~ "ESI/1.0...

Controller as a service is continually touted as the best practice. But why would I wrap a controller into a service? That's good question. Well, the point of doing this in general is not having to inject the DI container into your controllers (instead, you inject the dependencies into the controller directly). Thus the controller no longer depends on the container. Good: You get added flexibility. You no longer hard-code which services to use into your controller. You can specify that in the DI configuration instead. Example: You inject a UserProvider into the UserController for /profile, but inject a FacebookUserProvider into the same UserController for /profile/facebook. Bad: You must manually configure your dependencies in the DIC config. You need to manually assign the injected dependencies. Optional dependencies are no longer lazy-loaded. This is basically just a proof of concept to show how it could be done. namespace Acme\DemoBundle\Controller; class FooContr...

Hi Friends, Few month back I was trying to execute Symfony2 command in my controller. See how can we do that. Step 1 Register you command as service MyCommandService: class: MyBundle\Command\MyCommand calls: - [setContainer, ["@service_container"] ] Step 2 In your controller, you'll just have to get this service, and call the execute method with the rights arguments. Set the input with setArgument method: use Symfony\Component\Console\Input\ArgvInput; use Symfony\Component\Console\Output\ConsoleOutput; . . . public function myAction() { $command = $this->get('MyCommandService'); $input = new ArgvInput(array('arg1'=> 'value')); $output = new ConsoleOutput(); $command->run($input, $output); } Step 3 Either you can use the execute method of command: $command->execute($input, $ouput); But see the defination of run() and execute() methods. run () -: The code to ...

In Symfony 1.x a task is a command line tool to help perform tasks around the application. The same is in Symfony 2. Unfortunately in Symfony2 there is no tool to auto-generate some code for these. To create a Symfony2 Command you must to have or to create in your Bundle a folder named Command. Symfony 2 is mainly used to create web application, however, sometimes you need to extend your app and need a command line tool to help perform tasks around the application. It's one of the most stable parts of the framework and many people have already been using it for several months in many projects as it makes it really easy to develop this kind of software. And of course, everything is done in a really cool way, as many of the parts of Symfony2. Let’s see how can extremely easy create a new Command Task and custom our output. Create a file in Command Folder, for instance NewsletterCommand.php and fill it with an empty Command structure as follows <?php namespace Ankit\News...

We all know that Symfony is already in the core of Drupal 8 but how it works and how both systems work? Not that many people understand fully this integration. Me neither but I would like to pubilsh my research notes about how Drupal 8 works now. Surely this material is based on the snapshot of beginning September and I really hope that more things will happen so this information is relevant only for some time. I have little experience of the building projects with Symfony so my knowledge is very close to majority of drupal developers. So lets start. First changes we see in index.php that bootstrap is done on the level of DRUPAL_BOOTSTRAP_CODE instead of DRUPAL_BOOTSTRAP_FULL like in Drupal 7. From documentation about phases of bootstrap of Drupal 8 we can see that phase that "initialize language, path, theme, and modules" is not done yet. Next thing we see that we instantiate object of the DrupalKernel class (inherits from Symfony Kernel class) Kernel class in Symf...