PHP session variables lost after redirect

问题

Session variables are lost after using the following code to redirect:

    header('Location: ./protected_page.php');
    exit; //doesn't seem to do anything

On protected page I make sure to use session_start() before referencing any session variables.

Please help!

回答1:

• You redirect to the same domain.If you are redirecting from www.thedomain.com to thedomain.com can possibly end you session

• Ensure register_globals is off, you can check this on the php.ini file and also using phpinfo().

• The session variables aren't overwritten.

• switching between http and https can also end your session.

来源：https://stackoverflow.com/questions/35237488/php-session-variables-lost-after-redirect