session_start
To remove all of the session variables (clear the session variables saved) loop through the session array and pop off all of the elements like so. This might be used in a 'log off' function to remove the user sessions.
<?php
foreach ($_SESSION as $key) {
array_pop($_SESSION);
}
?>
session_unregister
(PHP 4, PHP 5)
session_unregister — Unregister a global variable from the current session
说明
bool session_unregister
( string $name
)
session_unregister() unregisters the global variable named name from the current session.
参数
- name
-
The variable name.
返回值
如果成功则返回 TRUE，失败则返回 FALSE。
注释
Note: If $_SESSION (or $HTTP_SESSION_VARS for PHP 4.0.6 or less) 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.
Caution
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.
Caution
If you are using $_SESSION (or $HTTP_SESSION_VARS), do not use session_register(), session_is_registered() and session_unregister().
add a note
User Contributed Notessession_unregister
w_Patrick_Gale
13-Dec-2007 02:55
13-Dec-2007 02:55
dylan82 AT xs4all DOT nl
09-Dec-2004 05:13
09-Dec-2004 05:13
If globals is on, you'll have to unset the $_SESSION[varname] as well as the $varname.
Like:
unset($_SESSION[varname]);
unset($varname);
jsmith at uncommoner dot com
27-Nov-2004 02:55
27-Nov-2004 02:55
as a side note you must have session_start() set inorder to actually unregister the session varibles.