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Added instructions to upgrade Symfony applications to 4.x

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Javier Eguiluz 2017-10-28 17:03:09 +02:00
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UPGRADE-4.0.md
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UPGRADE FROM 3.x to 4.0
=======================
Symfony Framework
-----------------
The first step to upgrade a Symfony 3.x application to 4.x is to update the
file and directory structure of your application:
| Symfony 3.x | Symfony 4.x
| ----------------------------------- | --------------------------------
| `app/config/` | `config/`
| `app/config/*.yml` | `config/*.yaml` and `config/packages/*.yaml`
| `app/config/parameters.yml.dist` | `config/services.yaml` and `.env.dist`
| `app/config/parameters.yml` | `config/services.yaml` and `.env`
| `app/Resources/<BundleName>/views/` | `templates/bundles/<BundleName>/`
| `app/Resources/` | `src/Resources/`
| `app/Resources/assets/` | `assets/`
| `app/Resources/translations/` | `translations/`
| `app/Resources/views/` | `templates/`
| `src/AppBundle/` | `src/`
| `var/logs/` | `var/log/`
| `web/` | `public/`
| `web/app.php` | `public/index.php`
| `web/app_dev.php` | `public/index.php`
Then, upgrade the contents of your console script and your front controller:
* `bin/console`: https://github.com/symfony/recipes/blob/master/symfony/console/3.3/bin/console
* `public/index.php`: https://github.com/symfony/recipes/blob/master/symfony/framework-bundle/3.3/public/index.php
Lastly, read the following article to add Symfony Flex to your application and
upgrade the configuration files: https://symfony.com/doc/current/setup/flex.html
If you use Symfony components instead of the whole framework, you can find below
the upgrading instructions for each individual bundle and component.
ClassLoader
-----------