This is already configurable with the "xdebug.show_exception_trace" setting, see the documentation at: http://xdebug.org/docs-settings.php#show_exception_trace (and it defaults to off). However, there have been some versions where this configuration setting did not exist, so you might have to upgrade.

The setting doesn't work for me.

I get the following behaviour for different combinations of show_exception_trace and catching/not catching exceptions:

1. show_exception_trace = 1
   a. uncaught: logs stack trace twice to httpd error log
   b. caught: logs stack trace twice
2. show_exception_trace = 0
   a. uncaught: logs stack trace once
   b. caught: logs stack trace once

When using the PHP commandline version:

1. show_exception_trace = 1
   a. uncaught: displays stack trace once
   b. caught: no stack trace
2. show_exception_trace = 0
   a. uncaught: displays stack trace once
   b. caught: no stack trace

What I want is the behaviour of the apache module version to be the same as the commandline version, ie. log a stack trace if an exception is not caught.

The tests were done with the following script:

echo "xdebug.show_exception_trace=".ini_get("xdebug.show_exception_trace")."\n";
flush();
try {
throw new Exception('test');
}
catch (Exception $e) {
echo "Caught!\n";
}

For the "uncaught" tests remove the try/catch.

This is with XDebug version 2.0.0RC3, AFAIK there is no more recent release. PHP version is 5.2.1, however behaviour was the same with 5.1.6. Apache is 2.0.54.

Forgot to mention in my last note:

The php.ini used was exactly the same in both the apache and commandline tests. Only changes were with regards to the show_exception_trace option. All other xdebug related options are at defaults.

Apache LogLevel is "debug".

You'd have to use Xdebug from CVS - I addressed this issue on February 28th. See http://xdebug.org/install.php#source on how do install from CVS.