# Log::Log4perl::Level - phpMan

## NAME
    [Log::Log4perl::Level] - Predefined log levels

## SYNOPSIS
      use [Log::Log4perl::Level];
      print $ERROR, "\n";

      # -- or --

      use [Log::Log4perl] qw(:levels);
      print $ERROR, "\n";

## DESCRIPTION
    "[Log::Log4perl::Level]" simply exports a predefined set of *Log4perl* log
    levels into the caller's name space. It is used internally by
    "[Log::Log4perl]". The following scalars are defined:

        $OFF
        $FATAL
        $ERROR
        $WARN
        $INFO
        $DEBUG
        $TRACE
        $ALL

    "[Log::Log4perl]" also exports these constants into the caller's namespace
    if you pull it in providing the ":levels" tag:

        use [Log::Log4perl] qw(:levels);

    This is the preferred way, there's usually no need to call
    "[Log::Log4perl::Level]" explicitly.

    The numerical values assigned to these constants are purely virtual,
    only used by [Log::Log4perl] internally and can change at any time, so
    please don't make any assumptions. You can test for numerical equality
    by directly comparing two level values, that's ok:

        if( get_logger()->level() == $DEBUG ) {
            print "The logger's level is DEBUG\n";
        }

    But if you want to figure out which of two levels is more verbose, use
    Log4perl's own comparator:

        if( [Log::Log4perl::Level::isGreaterOrEqual]( $level1, $level2 ) ) {
            print [Log::Log4perl::Level::to_level]( $level1 ),
                " is equal or more verbose than ",
                [Log::Log4perl::Level::to_level]( $level2 ), "\n";
        }

    If the caller wants to import level constants into a different
    namespace, it can be provided with the "use" command:

        use [Log::Log4perl::Level] qw(MyNameSpace);

    After this $[MyNameSpace::ERROR], $[MyNameSpace::INFO] etc. will be defined
    accordingly.

  Numeric levels and Strings
    Level variables like $DEBUG or $WARN have numeric values that are
    internal to Log4perl. Transform them to strings that can be used in a
    Log4perl configuration file, use the c<to_level()> function provided by
    [Log::Log4perl::Level]:

        use [Log::Log4perl] qw(:easy);
        use [Log::Log4perl::Level];

            # prints "DEBUG"
        print [Log::Log4perl::Level::to_level]( $DEBUG ), "\n";

    To perform the reverse transformation, which takes a string like "DEBUG"
    and converts it into a constant like $DEBUG, use the to_priority()
    function:

        use [Log::Log4perl] qw(:easy);
        use [Log::Log4perl::Level];

        my $numval = [Log::Log4perl::Level::to_priority]( "DEBUG" );

    after which $numval could be used where a numerical value is required:

        [Log::Log4perl]->easy_init( $numval );

## 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.