To unregister some session you can use:
<?php
// delete session
$_SESSION['NAME'] = array();
// start session
session_start();
// put info in session
$_SESSION['NAME']['userid'] = 5;
$_SESSION['NAME']['name'] "John Doe";
?>
(PHP 4, PHP 5 < 5.4.0)
session_unregister — Unregister a global variable from the current session
$name
) : bool
session_unregister() unregisters the global variable
named name from the current session.
本函数已自 PHP 5.3.0 起废弃并将自 PHP 5.4.0 起移除。
nameThe variable name.
成功时返回 TRUE， 或者在失败时返回 FALSE。
Note:
If $_SESSION is used, use unset() to unregister a session variable. Do not unset() $_SESSION itself as this will disable the special function of the $_SESSION superglobal.
This function does not unset the corresponding global variable for
name, it only prevents the variable from being
saved as part of the session. You must call unset()
to remove the corresponding global variable.
If you are using $_SESSION (or $HTTP_SESSION_VARS), do not use session_register(), session_is_registered() and session_unregister().
To unregister some session you can use:
<?php
// delete session
$_SESSION['NAME'] = array();
// start session
session_start();
// put info in session
$_SESSION['NAME']['userid'] = 5;
$_SESSION['NAME']['name'] "John Doe";
?>
If globals is on, you'll have to unset the $_SESSION[varname] as well as the $varname.
Like:
unset($_SESSION[varname]);
unset($varname);
as a side note you must have session_start() set inorder to actually unregister the session varibles.