ID: 13933
Updated by: yohgaki
Reported By: [EMAIL PROTECTED]
Status: Open
Bug Type: Output Control
Operating System: Windows NT4 SP6
PHP Version: 4.0.6
Assigned To: zak
New Comment:
Zak, is this bug analyzed?
I'm trying to sort out output buffering problems.
Thanks.
Previous Comments:
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[2001-12-10 20:40:37] [EMAIL PROTECTED]
Assigning it to myself so that I don't forget about it. :)
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[2001-12-05 04:24:00] [EMAIL PROTECTED]
I finally found time to test. Here it goes.
First of all, PHP config is:
error_log is not set
display_errors is off
log_errors is on
error_reporting is standard (E_ALL & ~E_NOTICE)
Then, the page I'm testing:
<?
error_log ("this is a test", 0);
header("Location: index.php");
?>
And finally, the results:
- in Apache's log file, I get these two lines:
[Wed Dec 05 10:09:59 2001] [error] [client 172.22.50.91] this is a test
[Wed Dec 05 10:09:59 2001] [error] [client 172.22.50.91] PHP Warning: Cannot add
header information - headers already sent in d:\wwwroot\htdocs\csf_recette\titi.php on
line 3
- the source of the generated page displayed in IE is as follow, eventhough nothing
has been output:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=iso-8859-1"></HEAD>
<BODY></BODY></HTML>
Conclusion:
- error_log works fine, it does what I expect, but it might do a little more;
- PHP complains about something being output *before* the call to header. I've tried
removing this call (to header), my message is logged, and I *still* get the same
output;
- thus, somehow, the call to error_log produces PHP or Apache to generate this
unexpected HTML code while logging;
I've tried almost the same settings on another server (difference in php.ini is
display_errors on) and it works quite fine.
Could there be other parts of PHP's configuration, or even Apache's conf, altering the
expected behaviour ?
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[2001-11-12 19:54:19] [EMAIL PROTECTED]
Status -> feedback (Zak! try to remember? :)
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[2001-11-12 17:01:23] [EMAIL PROTECTED]
Sounds like error_log() was generating an error message
because the error_log directive was not set. Once the
error message was generated, output would be sent to the
browser, causing the headers to be sent and the header()
call to fail.
Try unsetting the error_log directive in php.ini and run a
script that only calls error_log().
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[2001-11-05 09:11:29] [EMAIL PROTECTED]
[Might be related to bug #11213]
Using :
NT4 SP6
Apache 1.3.20
PHP 4.0.6
Zend Optimizer 1.1 (bug reproduced without also)
I have a quite short PHP page needing to log something, and then switch to another PHP
page.
I use the following PHP code :
error_log ($message, 0);
header("Location: new-location.php");
I then get the following error message :
Cannot add header information - headers already sent
If I remove the call to error_log, the problem disappears, but I won't get the event
logged :( Thus, error_log must be 'the one' producing the unexpected output.
If I swap the two calls, (header first, then error_log), I'll get to new-location.php,
but nothing will get logged :(
If I specify a filename in the call to error_log, and leave it in second position (see
following example), it works fine (except I don't automatically get the date and IP
address of client like I used to get in Apache's log).
error_log ($message, 3, 'd:/program files/apache group/apache/logs/error.log');
Here is my PHP configuration regarding logging functions :
error_reporting = E_ALL & ~E_NOTICE
display_errors = On
display_startup_errors = Off
log_errors = On
Let's add another strange behaviour. If I add the following line in php.ini :
error_log = d:/program files/apache group/apache/logs/error.log
and execute again the first example (error_log with 2 args and then header), it works
fine :)
Any clues ?
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Edit this bug report at http://bugs.php.net/?id=13933&edit=1
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