[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 ?