PHPSESSID appended completely wrong with session.use_trans_sid enabled

Hi,

it seems to me that I've hit a bug related to the session.use_trans_sid
feature when output buffering (output_buffer) is on and configured to be
less than the content-size sent to the browser.

A self-made template system produces a php script as a string which gets
then eval'd. The produced script contains many 'echo' directives and
if-statements that evaluate conditions fed by the template system.

It is sometimes necessary to conditionally output parameters in an url
of a link (html anchor). So, instead of echo'ing the whole link at once
it gets written to the output with 'echo' 3 or more times.

E.g.
<code>
echo '<a href="editfilingcard.m-box?action=modify&amp;fcardid=3067';
// some condition from the template system was evaluated
// to be true
if (true)
  echo '&amp;belongs2fcard=1411';
echo '&amp;setmgrname=mboxobj">link text</a>
</code>


Now, it happens sometimes that the session ID is appended completely
wrong after the quote closing the 'href' attribute but before the
tag-closing '>':
<a
href="editfilingcard.m-box?action=modify&amp;fcardid=3067&amp;belongs2fcard=1411&amp;setmgrname=mboxobj"?PHPSESSID=f0hriua92m1oe6hmn47upm8n34>

Interestingly, links before or after the one mentioned here aren't
affected in my scenario.
Also, removing enough characters from the output before the link,
everything works fine; and if I increase the output buffer from the
default (4096) to 8192 (which is more than the content-size in my
scenario) everything is fine, too.


I assume, due to my tests, that output buffering somehow interferes
badly with automatically inserting the session ID.


I'm using php-5.2.10 on windows together with apache and IIS.
Any help is welcome, I can provide a script reproducing the problem.

Klaus

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