file_permissions.rst

Setting up or Fixing File Permissions

In Symfony 3.x, you needed to do some extra work to make sure that your cache directory was writable. But that is no longer true! In Symfony 4, everything works automatically:

• In the dev environment, umask() is used in bin/console and public/index.php so that any created files are writable by everyone.
• In the prod environment (i.e. when APP_ENV is prod and APP_DEBUG is 0), as long as you run php bin/console cache:warmup, no cache files will need to be written to disk at runtime.

Note

If you decide to store log files on disk, you will need to make sure your logs directory (e.g. var/log/) is writable by your web server user and terminal user. One way this can be done is by using chmod -R 777 var/log/. Just be aware that your logs are readable by any user on your production system.