DESCRIPTION
       The "use utf8" pragma tells the Perl parser to allow UTF-8 in the
       program text in the current lexical scope (allow UTF-EBCDIC on EBCDIC
       based platforms).  The "no utf8" pragma tells Perl to switch back to
       treating the source text as literal bytes in the current lexical scope.

       Do not use this pragma for anything else than telling Perl that your
       script is written in UTF-8. The utility functions described below are
       directly usable without "use utf8;".

       Because it is not possible to reliably tell UTF-8 from native 8 bit
       encodings, you need either a Byte Order Mark at the beginning of your
       source code, or "use utf8;", to instruct perl.