NAME

Unicode::Homoglyph::Replace - replace homoglyphs with their ASCII lookalike equivalents

SYNOPSIS

    use Unicode::Homoglyph::Replace qw(replace_homoglyphs);

    my $replaced = replace_homoglyphs("...");
    ...

DESCRIPTION

Unicode has various homoglyphs - characters which look the same or mostly the the same, but are different characters.

If you're trying to filter input in some way, but support Unicode text, then such homoglyphs can be used to get past your filters. For instance, there are eleven other characters that look like a colon.

So, if someone wants to be a ⅾⅰⅽk to bypass your filters, they can replace some characters with look-alike (or at least look-similar) characters which your profanity / spam filters won't recognise. (That example there was \x{217E}\x{2170}\x{217D}k - i.e. the characters SMALL ROMAN NUMERAL FIVE HUNDRED, SMALL ROMAN NUMERAL ONE, SMALL ROMAN NUMERAL ONE HUNDRED, and a "k".)

AUTHOR

David Precious, <davidp at preshweb.co.uk>

BUGS

Please report any bugs or feature requests to bug-unicode-homoglyph-replace at rt.cpan.org, or through the web interface at http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Unicode-Homoglyph-Replace. I will be notified, and then you'll automatically be notified of progress on your bug as I make changes.

SUPPORT

You can find documentation for this module with the perldoc command.

    perldoc Unicode::Homoglyph::Replace

You can also look for information at:

• RT: CPAN's request tracker (report bugs here)

  http://rt.cpan.org/NoAuth/Bugs.html?Dist=Unicode-Homoglyph-Replace

• AnnoCPAN: Annotated CPAN documentation

  http://annocpan.org/dist/Unicode-Homoglyph-Replace

• CPAN Ratings

  http://cpanratings.perl.org/d/Unicode-Homoglyph-Replace

• Search CPAN

  http://search.cpan.org/dist/Unicode-Homoglyph-Replace/

SEE ALSO

Unicode::Homoglyph, where the list of homoglyphs came from.

ACKNOWLEDGEMENTS

LICENSE AND COPYRIGHT

Copyright 2018 David Precious.

This program is free software; you can redistribute it and/or modify it under the terms of the the Artistic License (2.0). You may obtain a copy of the full license at:

http://www.perlfoundation.org/artistic_license_2_0

Any use, modification, and distribution of the Standard or Modified Versions is governed by this Artistic License. By using, modifying or distributing the Package, you accept this license. Do not use, modify, or distribute the Package, if you do not accept this license.

If your Modified Version has been derived from a Modified Version made by someone other than you, you are nevertheless required to ensure that your Modified Version complies with the requirements of this license.

This license does not grant you the right to use any trademark, service mark, tradename, or logo of the Copyright Holder.

This license includes the non-exclusive, worldwide, free-of-charge patent license to make, have made, use, offer to sell, sell, import and otherwise transfer the Package with respect to any patent claims licensable by the Copyright Holder that are necessarily infringed by the Package. If you institute patent litigation (including a cross-claim or counterclaim) against any party alleging that the Package constitutes direct or contributory patent infringement, then this Artistic License to you shall terminate on the date that such litigation is filed.

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