The culprit was Chrome's HTML Validator extension. It triggered an 
additional request for the page doing the logging therefore resulting in 
logging of two identical entries. Once I disabled the extension the problem 
went away.

Sorry for the false alarm.

J.S.

""J.S."" <h...@webserverone.com> wrote in message 
news:73.47.09318.7bde8...@pb1.pair.com...
> Hi,
>
> When I call error_log() to log a message to the log file, I end up with 
> duplicate entries. Here is a minimal test script which reproduces the 
> problem for me:
>
> <?php
> ini_set('error_log', 'C:\Apache2\htdocs\myapp\app\logs\error_log');
> error_log('some log message that, via a bug, will be logged twice');
> ?>
>
> will log:
>
> [30-Jan-2013 09:41:13 UTC] some log message that, via a bug, will be 
> logged twice
> [30-Jan-2013 09:41:13 UTC] some log message that, via a bug, will be 
> logged twice
>
> If it matters, I am running the VC9 x86 Thread Safe build of PHP 5.4.11 on 
> a Windows XP box but I had seen this problem in PHP 5.3.6 as well. I am 
> running Apache 2.2 for Web server.
>
> Can somebody confirm whether this is a bug? I checked the bug database on 
> php.net but did not find anything relevant.
>
> Best regards
>
> J.S.
> 



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