Question

I previously used these three lines to delete a session:

session_start();
session_regenerate_id();
session_destroy();

Does session_destroy() close the session, or do I have to close it manually?

session_start();
session_regenerate_id();
$_SESSION = array();
session_write_close();

Answer 1

If you are destroying the session then there isn’t really a need to session_write_close(), as in the manual it does the following:

Session data is usually stored after your script terminated without the need to call session_write_close(), but as session data is locked to prevent concurrent writes only one script may operate on a session at any time.