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Bug #21821 Unsetting $_COOKIE[session_name()] shouldn't warn, but send new cookie
Submitted: 2003-01-22 11:43 UTC Modified: 2003-01-22 19:26 UTC
From: msopacua@php.net Assigned:
Status: Not a bug Package: Session related
PHP Version: 4.3.0 OS: BSD/OS 4.2
Private report: No CVE-ID: None
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 [2003-01-22 11:43 UTC] msopacua@php.net 
The following script:
<?php
error_reporting(E_ALL);
if(isset($_COOKIE[session_name()]) && !file_exists(session_save_path(NULL) . '/sess_' . session_id(NULL)))
        unset($_COOKIE[session_name()]);
ini_set('session.use_only_cookies', TRUE);
ini_set('session.cookie_lifetime', 7 * 24 * 3600);
ini_set('session.gc_lifetime', 7 * 24 * 3600);
session_start();
?>
<html>
<body>
<a href="<?php echo $_SERVER['PHP_SELF']; ?>?foo=<?php echo time(); ?>">refresh</a>
<pre>
<?php var_dump($_SESSION); ?>
</pre>
</body>
</html>

<?php
$_SESSION['test'] = 'hi' . $_GET['foo'];
?>

Creates warnings about illegal chars in the session id. However - there is no valid session here, as there is no valid cookie. It should send a new cookie instead, with a new generated session id. However - it sets an empty id:
Set-Cookie: PHPSESSID=; expires=Wed, 29-Jan-2003 17:37:42 GMT; path=/

If I also unset $_SESSION, it doesn't change anything.

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 [2003-01-22 11:49 UTC] msopacua@php.net 
Ahum - NULL (inserted for readibility) apparently is '' not, void.
 [2003-01-22 19:26 UTC] sniper@php.net 
And this really doesn't work like that..
You can't set/unset cookies by mangling the $_COOKIE[] array anyway.

Please ask support questions elsewhere.
 
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