HTML::FormFu::Filter::Callback

    $field->filter({
        type     => 'Callback',
        callback => \&my_filter,
    });
    ---
    elements:
      - type: Text
        name: foo
        filters:
          - type: Callback
            callback: "main::my_filter"
    sub my_filter {
        my ($value) = @_;
        
        # do something to $value
        
        return $value;
    }

Filter using a user-provided subroutine.

Carl Franks, "cfranks@cpan.org"

Based on the original source code of HTML::Widget::Filter::Callback, by Lyo Kato, "lyo.kato@gmail.com"

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