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Bug #37510 session_regenerate_id changes session_id() even on failure
Submitted: 2006-05-18 20:19 UTC Modified: 2006-05-18 22:18 UTC
From: dabrfe at gmail dot com Assigned: bjori (profile)
Status: Closed Package: Session related
PHP Version: 4.4.2 OS: ?
Private report: No CVE-ID: None
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From: dabrfe at gmail dot com
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 [2006-05-18 20:19 UTC] dabrfe at gmail dot com
session_regenerate_id will not really work if any output has 
been sent to the browser because it can't send the header 
required. However, even if it fails (and issues a warning), 
the value returned by session_id() is changed and there then 
is an inconsistency between session_id() and the actual 
session id.

Reproduced in 4.4.2 and 5.1.2 on OS X 10.4.6 (built from 
Reproduced in 4.4.1 on RedHat 9

Does not fail at all (no header warning and session id is 
correctly changed) in 5.0.3 on OS X 10.4.5 (package from

Reproduce code:
ini_set('display_errors', true);
print "orig: $orig_id<br>";
print "new: $new_id<br>";
<a href="session.php">go again</a>

Expected result:
If regenerate worked:
orig: 1234
new: 2345
<click link>
orig: 2345
new: 3456
<click link>
orig: 3456
new: 4567
<click link>
orig: 4567
new: 5678

If regenerate failed:
orig: 1234
new: 1234
<click link>
orig: 1234
new: 1234
<click link>
orig: 1234
new: 1234
<click link>
orig: 1234
new: 1234

Actual result:
When regenerate fails w/ header warning:
orig: 1234
new: 2345
<click link>
orig: 1234
new: 3456
<click link>
orig: 1234
new: 4567
<click link>
orig: 1234
new: 5678


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 [2006-05-18 22:18 UTC]
This bug has been fixed in CVS.

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