Sessions are the technique for keeping track of a site’s and a browser’s state. During the session, the user data is stored in sessions, which are server-side files. The session ends when the user closes the browser or logs out of the program. Within a session, we can keep as much data as we want, We must use the session start() method to start the session. There is one advantage of using a session is that the data is stored in an encrypted format.
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