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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
umask()is used in
public/index.phpso that any created files are writable by everyone.
- In the
prodenvironment (i.e. when
0), as long as you run
php bin/console cache:warmup, no cache files will need to be written to disk at runtime. The only exception is when using a filesystem-based cache, such as Doctrine's query result cache or Symfony's cache with a filesystem provider configured.
- In all environments, the log directory (
var/log/by default) must exist and be writable by your web server user and terminal user. One way this can be done is by using
chmod -R 777 var/log/. Be aware that your logs are readable by any user on your production system.