++ed by:

1 non-PAUSE user.

Tatsuhiko Miyagawa


Encode::DoubleEncodedUTF8 - Fix double encoded UTF-8 bytes to the correct one


  use Encode;
  use Encode::DoubleEncodedUTF8;

  my $dodgy_utf8 = "Some byte strings from the web/DB with double-encoded UTF-8 bytes";
  my $fixed = decode("utf-8-de", $dodgy_utf8); # Fix it


Use this module only for testing, debugging, data recovery and working around with buggy software you can't fix.

Do not use this module in your production code just to work around bugs in the code you can fix. This module is slow, and not perfect and may break the encodings if you run against correctly encoded strings. See perlunitut for more details.


Encode::DoubleEncodedUTF8 adds a new encoding utf-8-de and fixes double encoded utf-8 bytes found in the original bytes to the correct Unicode entity.

The double encoded utf-8 frequently happens when strings with UTF-8 flag and without are concatenated, for instance:

  my $string = "L\x{e9}on";   # latin-1
  my $bytes  = "L\xc3\xa9on"; # utf-8

  my $dodgy_utf8 = encode_utf8($string . " " . $bytes); # $bytes is now double encoded

  my $fixed = decode("utf-8-de", $dodgy_utf8); # "L\x{e9}on L\x{e9}on";

See encoding::warnings for more details.


Tatsuhiko Miyagawa <miyagawa@bulknews.net>


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


encoding::warnings, Test::utf8