How to use session()->close()?

1) session_close is checking to see if your in environment testing mode then it will return else it will issue a session_write_close.

2) Difference is that close is doing what I said above. remove just removes session data by item or array.

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Hope that clarifies it for you.

@InsiteFX thank you, I got the difference now. 1. Closing the Session "process" vs 2. Removing the data/item/array.

If you use AJAX then you should do a session_write_close when finished with your sessions.

Does it mean that session()->close() can only improve performance for AJAX?

What about in the context of non-AJAX requests (normal page reload)? Can session()->close() also improve performance in this case; as per documentation said that?

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maybe you need to execute destroy()?

@ozornick thank you, I will destroy session when user logout, right?

 At first, I thought close() was a new feature in CI4 to enhance the destroy method, but it gues I was wrong."

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close() persists the session data (e.g. it saves in the session file or the database) and closes the session.
But it does not change the existing session data (after all, $_SESSION in PHP).

I understand now what session->close() do (and don't).

As stated in the documentation, it says that closing the session is a best practice for improving performance related to locking/unlocking the session. Does this also apply to non-AJAX requests, regarding @InsiteFX comment above?