(PHP 4 >= 4.3.2, PHP 5)
session_regenerate_id — Update the current session id with a newly generated one
session_regenerate_id() will replace the current session id with a new one, and keep the current session information.
Whether to delete the old associated session file or not. Defaults to FALSE.
如果成功则返回 TRUE，失败则返回 FALSE。
| 版本 | 说明 |
|---|---|
| 4.3.3 | Since then, if session cookies are enabled, use of session_regenerate_id() will also submit a new session cookie with the new session id. |
| 5.1.0 | Added the delete_old_session parameter. |
Example#1 A session_regenerate_id() example
<?php
session_start();
$old_sessionid = session_id();
session_regenerate_id();
$new_sessionid = session_id();
echo "Old Session: $old_sessionid<br />";
echo "New Session: $new_sessionid<br />";
print_r($_SESSION);
?>