为什么`session_destroy（）`在PHP中不起作用？

Question

I have this problem with sessions in PHP which I have never been able to comprehend!
I have the following code in a PHP file:

session_start();
$sid = session_id();
session_unset();
session_destroy();
echo $sid;

Logically every time the it should give me different session IDs cause obviously I call session_destroy() but it just won't kill the session. It always gives me the same session ID!
Am I doing it wrong?

Answer 1

For me, only the following combination works perfectly to destroy a session completely:

session_destroy();
session_unset();
session_regenerate_id(true);

Edit: Did you try this:

<?php
session_start();
$sid = session_id();
echo $sid;
echo "<br />";

//destroy session
session_destroy();
session_unset();

//now start the new session
session_start();
session_regenerate_id(true);
$sid = session_id();
echo $sid;
?>

It work's perfectly.