How to write logout in php

How to log out in php: first release all [$_SESSION] variables currently created in the memory, the code is [session_unset]; then delete the session file corresponding to the current user and release the session id.

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How to write a logout in php:

In the PHP program, after the login is completed, it will be stored in the session. When logging out, the session needs to be released. The corresponding code is as follows.

It should be noted that:

• session_unset();Release all$_SESSION## that have been created in the memory. #Variable, but does not delete the session file and does not release the corresponding session id;

• session_destroy();Delete the session file corresponding to the current user and release the session id, The contents of the$_SESSIONvariable in the memory are still retained;

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