问非活动状态后的随机时间自动注销

EN

   # app/config/config.yml
    framework:
        session:
            # ...
            handler_id: session.handler.pdo

    services:
        session.handler.pdo:
            class:     Symfony\Component\HttpFoundation\Session\Storage\Handler\PdoSessionHandler
            public:    false
            arguments:
                - 'mysql:dbname=mydatabase'
                - { db_username: myuser, db_password: mypassword }