Manual:

Reference:

-- Perl 5.8.8 documentation --

DBM_Filter::utf8

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

    $db = tie %hash, ...
    $db->Filter_Push('utf8');

This Filter will ensure that all data written to the DBM will be encoded in UTF-8.

This module uses the Encode module.