If no maximum limit is set on the maximum number of session objects that can be held in memory, then it is possible to have many session objects during peak user load time.

如果不对内存中可以保持的会话对象的最大数量设置最大限制，那么在用户加载高峰期，可能有许多会话对象。

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For example, you could check to see if a user ID has been set in a session variable (showing that the user has actually logged in).

例如，可以检查一个会话变量中是否设置了一个用户ID(表明该用户已经登录)。

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Then another session variable is set (the update message), and the user is redirected back to the index.php page.

然后，设置另一个会话变量（更新消息），并将用户重定向回 index.php 页面。

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