登出后为什么还能回到上一页？

Question

After I log out, why can I still go back to the previous web page? I already put:

<?php 
    session_start();
    session_destroy();
?>

Answer 1

As everyone is saying we need more info to help. But my guess is the session is not getting destroyed cause you already sent a header before that. Turn the display_errors on in your php.ini and set error_reporting to E_ALL. You'll get more info on what's happening.