As an every-day Composer user, I always used it on a project scope, i.e with a
composer.json lying in a specific project directory.
I discover recently than it can also be used on a global way (meaning not related to a project) using
composer global require squizlabs/php_codesniffer
The globally installed package will be accessible user-system wide. On my Ubuntu system, global
vendor folder lies on
It strikes me yesterday that this feature is exactly the same one which is provided by
bower, other packages/dependencies manager.