Upgrading to the Symfony 3.0 Directory Structure

this was an awesome article! thanks for writing it!

After following your instructions i can start the application but if i want to run the /app_dev.php dev mode,i get an error:

FatalErrorException in AppKernel.php line 0:
Compile Error: Cannot declare class AppKernel, because the name is already in use

I followered your instructions to the changes of the AppKernel and app_dev php files.
Whats confusing, a new bootstrap.php.cache file will be created inside the /app folder instead of the var /var folder.

So i guess there is something wrong with the ScriptHandler::buildBootstrap part
In the official Symfony 2.7 documentation the Incenteev yaml loader is used. This is not part of your description.
Do i need to adjust it too? Does it even matter? It is used for building a parameters.yaml out of a parameters.yaml.dist.
Why does my buildBootrap Scripthandler creates a bootstrap.php.cache file still in my /app folder, if i configured it to var, and why does the app_dev.php thinks there is an duplicate clss issue?

Running without app_dev.php works fine.

@Edit:
I found the Error myself. I still had one require_once __DIR__.'/../app/AppKernel.php'; left which i overlooked.
With autoload.php in both app.php and app_dev.php it works just fine :)

Hi,
I follow the tutorial doing line by line all.
But at video 7min 19 sec
just after to set directory (app,web,var, bin and tests) in "extra" (in composer.json)
I run the command "composer install" and error appears:

/application$ composer install
[...]
Could not open input file: app/console
Script Sensio\Bundle\DistributionBundle\Composer\ScriptHandler::clearCache handling the post-install-cmd event terminated with an exception

In ScriptHandler.php line 220:

An error occurred when executing the "'cache:clear --no-warmup'" command.

[...]

it seems it try to look at app/console and not at /bin/console

Now? what can I look for?

If I’m updgrading to Symfony 2.8 only, do I need to upgrade the directory structure?

Kudos Mahabaniri!

Thanks for this article! Great help.