Problem with recent versions and apache2(?)

Thomas Mangin thomas.mangin at
Thu Jul 20 14:34:35 CEST 2006

>> > Scratch that, I'm getting lots of these errors even with the latest
>> > trunk:
>> >
>> > [Wed Jul 19 11:28:07 2006] [error] [client] PHP
>> > Warning:  Cannot modify header information - headers already sent in
>> > Unknown on line 0
>> I've seen this error for weeks (months?) on my system; freebsd, 
>> apache2, php5, mysql 5 - but was told it was harmless, and assumed 
>> it'd be addressed.  no I haven't checked if it's an entered bug - 
>> should have.
>> > Sometimes they result in a blank message window, but generally I can
>> > go on browsing.  I don't really get the pattern yet.
>> I haven't seen this in recent builds, even when the error shows up in 
>> the logs.

This is a common problem when one of the include file has a blank line 
(or any html) and when the code then try to set a header for the page.

I would look for any empty line after any "?>" or " ?php> " tag in any 
of the page or config file.


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