What is the purpose of the "session_destroy()" function?

The "session_destroy()" function is used specifically to terminate the current session and clear all session data associated with it. When this function is called, it effectively removes all the session variables that were previously stored for that session. This is particularly useful for logout functionality or when a session is no longer needed, allowing the web application to free up resources and ensure that the session does not persist beyond its intended purpose.

The operation does not merely unset session variables; it eliminates the entire session, ensuring that the session is no longer accessible. This contributes to better security practices, especially in applications where user data privacy is paramount.

Starting a new session is handled by the "session_start()" function, not "session_destroy()". Destroying a specific cookie requires different handling entirely, as cookies operate independently from sessions, and fetching session variables does not pertain to ending or destroying a session. Thus, the choice of "session_destroy()" for ending the current session and clearing session data is both ideal and accurate.