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PHP5中文手册
Sessions
PHP Manual

session_regenerate_id

(PHP 4 >= 4.3.2, PHP 5)

session_regenerate_id — Update the current session id with a newly generated one

说明

bool session_regenerate_id ([ bool $delete_old_session ] )

session_regenerate_id() will replace the current session id with a new one, and keep the current session information.

参数

delete_old_session

Whether to delete the old associated session file or not. Defaults to FALSE.

返回值

如果成功则返回 TRUE，失败则返回 FALSE。

更新日志

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.

范例

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);
?>

参见

Sessions
PHP Manual