How to get the root dir of the Symfony2 application?

Question

What is the best way to get the root app directory from inside the controller? Is it possible to get it outside of the controller?

Now I get it by passing it (from parameters) to the service as an argument, like this:

services:

    sr_processor:
        class: Pro\Processor
        arguments: [%kernel.root_dir%]

Is there a better, simpler way to get this information in Symfony2?

Answer 1

UPDATE 2018-10-21:

As of this week, getRootDir() was deprecated. Please use getProjectDir() instead, as suggested in the comment section by Muzaraf Ali.

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Use this:

$this->get('kernel')->getRootDir();

And if you want the web root:

$this->get('kernel')->getRootDir() . '/../web' . $this->getRequest()->getBasePath();

this will work from controller action method...

EDIT: As for the services, I think the way you did it is as clean as possible, although I would pass complete kernel service as an argument... but this will also do the trick...