framework:
    session:
        handler_id: SymfonyComponentHttpFoundationSessionStorageHandlerPdoSessionHandler


services:
    SymfonyComponentHttpFoundationSessionStorageHandlerPdoSessionHandler:
        public:    false
        arguments:
            - "mysql:host=%database_host%;port=%database_port%;dbname=%database_name%"
            - { db_username: %database_user%, db_password: %database_password% }