parameters: project_dir: '/foo/bar' env(FOO): foo env(DB): 'sqlite://%%project_dir%%/var/data.db' bar: '%env(FOO)%' baz: '%env(int:Baz)%' json: '%env(json:file:json_file)%' db_dsn: '%env(resolve:DB)%' services: test: public: true class: '%env(FOO)%' arguments: - '%env(Bar)%' - 'foo%bar%baz' - '%baz%' bar: class: Symfony\Component\DependencyInjection\Tests\Fixtures\Bar public: true bind: $quz: '%env(QUZ)%'