Bug #13933 Updated: error_log and HTTP redirect using header conflict

ID: 13933 Updated by: sniper Reported By: bonseb@free.fr Old Status: Open Status: Feedback Bug Type: Output Control Operating System: Windows NT4 SP6 PHP Version: 4.0.6 New Comment: Status -> feedback (Zak! try to remember? :) Previous Comments: ------------------------------------------------------------------------ [2001-11-12 17:01:23] zak@php.net 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(). ------------------------------------------------------------------------ [2001-11-05 09:11:29] bonseb@free.fr [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 ? ------------------------------------------------------------------------ Edit this bug report at http://bugs.php.net/?id=13933&edit=1