Answer Posted / anuj kumar gupta

session_destroy() — Destroys all data registered to a session

session_unregister() — Unregister a global variable from the
current session

session_unset() — Free all session variables

If globals is on, you'll have to unset the
$_SESSION[varname] as well as the $varname.

Like:

unset($_SESSION[varname]);
unset($varname);

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