# phpman > perldoc > Log::Log4perl::Resurrector

## NAME
    [Log::Log4perl::Resurrector](https://www.chedong.com/phpMan.php/perldoc/Log%3A%3ALog4perl%3A%3AResurrector/markdown) - Dark Magic to resurrect hidden L4p statements

## DESCRIPTION
    Loading "use [Log::Log4perl::Resurrector](https://www.chedong.com/phpMan.php/perldoc/Log%3A%3ALog4perl%3A%3AResurrector/markdown)" causes subsequently loaded modules to have their hidden

        ###l4p use [Log::Log4perl](https://www.chedong.com/phpMan.php/perldoc/Log%3A%3ALog4perl/markdown) qw(:easy);

        ###l4p DEBUG(...)
        ###l4p INFO(...)
        ...

    statements uncommented and therefore 'resurrected', i.e. activated.

    This allows for a module "Foobar.pm" to be written with Log4perl statements commented out and
    running at full speed in normal mode. When loaded via

        use Foobar;

    all hidden Log4perl statements will be ignored.

    However, if a script loads the module "Foobar" *after* loading "[Log::Log4perl::Resurrector](https://www.chedong.com/phpMan.php/perldoc/Log%3A%3ALog4perl%3A%3AResurrector/markdown)", as
    in

        use [Log::Log4perl::Resurrector](https://www.chedong.com/phpMan.php/perldoc/Log%3A%3ALog4perl%3A%3AResurrector/markdown);
        use Foobar;

    then "[Log::Log4perl::Resurrector](https://www.chedong.com/phpMan.php/perldoc/Log%3A%3ALog4perl%3A%3AResurrector/markdown)" will have put a source filter in place that will extract all
    hidden Log4perl statements in "Foobar" before "Foobar" actually gets loaded.

    Therefore, "Foobar" will then behave as if the

        ###l4p use [Log::Log4perl](https://www.chedong.com/phpMan.php/perldoc/Log%3A%3ALog4perl/markdown) qw(:easy);

        ###l4p DEBUG(...)
        ###l4p INFO(...)
        ...

    statements were actually written like

        use [Log::Log4perl](https://www.chedong.com/phpMan.php/perldoc/Log%3A%3ALog4perl/markdown) qw(:easy);

        DEBUG(...)
        INFO(...)
        ...

    and the module "Foobar" will indeed be Log4perl-enabled. Whether any activated Log4perl
    statement will actually trigger log messages, is up to the Log4perl configuration, of course.

    There's a startup cost to using "[Log::Log4perl::Resurrector](https://www.chedong.com/phpMan.php/perldoc/Log%3A%3ALog4perl%3A%3AResurrector/markdown)" (all subsequently loaded modules
    are examined) but once the compilation phase has finished, the perl program will run at full
    speed.

    Some of the techniques used in this module have been stolen from the "[Acme::Incorporated](https://www.chedong.com/phpMan.php/perldoc/Acme%3A%3AIncorporated/markdown)" CPAN
    module, written by *chromatic*. Long live CPAN!

## LICENSE
    Copyright 2002-2013 by Mike Schilli <<m@perlmeister.com>> and Kevin Goess <<cpan@goess.org>>.

    This library is free software; you can redistribute it and/or modify it under the same terms as
    Perl itself.

## AUTHOR
    Please contribute patches to the project on Github:

        <http://github.com/mschilli/log4perl>

    Send bug reports or requests for enhancements to the authors via our

    MAILING LIST (questions, bug reports, suggestions/patches): <log4perl-devel@lists.sourceforge.net>

    Authors (please contact them via the list above, not directly): Mike Schilli
    <<m@perlmeister.com>>, Kevin Goess <<cpan@goess.org>>

    Contributors (in alphabetical order): Ateeq Altaf, Cory Bennett, Jens Berthold, Jeremy Bopp,
    Hutton Davidson, Chris R. Donnelly, Matisse Enzer, Hugh Esco, Anthony Foiani, James FitzGibbon,
    Carl Franks, Dennis Gregorovic, Andy Grundman, Paul Harrington, Alexander Hartmaier David Hull,
    Robert Jacobson, Jason Kohles, Jeff Macdonald, Markus Peter, Brett Rann, Peter Rabbitson, Erik
    Selberg, Aaron Straup Cope, Lars Thegler, David Viner, Mac Yang.