# phpman > man > DBM_Filter::compress

## NAME
    [DBM_Filter::compress](https://www.chedong.com/phpMan.php/perldoc/DBMFilter%3A%3Acompress/markdown) - filter for DBM_Filter

## SYNOPSIS
        use SDBM_File; # or DB_File, GDBM_File, NDBM_File, ODBM_File
        use DBM_Filter ;

        $db = tie %hash, ...
        $db->Filter_Push('compress');

## DESCRIPTION
    This DBM filter will compress all data before it is written to the database and uncompressed it
    on reading.

    A fatal error will be thrown if the [Compress::Zlib](https://www.chedong.com/phpMan.php/perldoc/Compress%3A%3AZlib/markdown) module is not available.

## SEE ALSO
    DBM_Filter, perldbmfilter, [Compress::Zlib](https://www.chedong.com/phpMan.php/perldoc/Compress%3A%3AZlib/markdown)

## AUTHOR
    Paul Marquess <pmqs@cpan.org>