您的会话并不会保持活跃状态，等待您以后回来；当到云实例的连接终止时，会话就结束了。

Your session does not magically remain active for you to return later; when your connection to the cloud instance ends, your session ends.

youdao

值得注意的是，除非您捕捉从构造函数抛出的异常，否则，如果php脚本未能连接到数据库，它将终止。

It's worth noting that, unless you catch exceptions that are thrown from the constructor, your PHP script will terminate if it could not connect to the database.

youdao

使用客户机通过SSL通道连接时，SSL协议将使用通道代理启动和终止。

When using a client to connect over an SSL channel, the SSL protocol starts and ends with the channel agent.

youdao