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不会吧~
session_destroy
(PHP 4, PHP 5)
session_destroy -- Destroys all data registered to a session
Description
bool session_destroy ( void )
session_destroy() destroys all of the data associated with the current session. It does not unset any of the global variables associated with the session, or unset the session cookie.
In order to kill the session altogether, like to log the user out, the session id must also be unset. If a cookie is used to propagate the session id (default behavior), then the session cookie must be deleted. setcookie() may be used for that.
如果成功则返回 TRUE,失败则返回 FALSE。
例子 1. Destroying a session with $_SESSION
<?php
// Initialize the session.
// If you are using session_name("something"), don't forget it now!
session_start();
// Unset all of the session variables.
$_SESSION = array();
// If it's desired to kill the session, also delete the session cookie.
// Note: This will destroy the session, and not just the session data!
if (isset($_COOKIE[session_name()])) {
setcookie(session_name(), '', time()-42000, '/');
}
// Finally, destroy the session.
session_destroy();
?>
注: Only use session_unset() for older deprecated code that does not use $_SESSION.
session_unset
(PHP 4, PHP 5)
session_unset -- Free all session variables
Description
void session_unset ( void )
The session_unset() function frees all session variables currently registered.
注: If $_SESSION (or $HTTP_SESSION_VARS for PHP 4.0.6 or less) is used, use unset() to unregister a session variable, i.e. unset ($_SESSION['varname']);.
session_unregister
(PHP 4, PHP 5)
session_unregister -- Unregister a global variable from the current session
Description
bool session_unregister ( string name )
session_unregister() unregisters the global variable named name from the current session.
This function returns TRUE when the variable is successfully unregistered from the session.
注: 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. |
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