utf8 - Perl pragma to enable/disable UTF-8 in source code
use utf8; no utf8;
WARNING: The implementation of Unicode support in Perl is incomplete. See the perlunicode manpage for the exact details.
This pragma is primarily a compatibility device. Perl versions earlier than 5.6 allowed arbitrary bytes in source code, whereas in future we would like to standardize on the UTF-8 encoding for source text. Until UTF-8 becomes the default format for source text, this pragma should be used to recognize UTF-8 in the source. When UTF-8 becomes the standard source format, this pragma will effectively become a no-op.