Dump in hexadecimal the content of a scalar. The result is
returned in a string. Each line of the result consists of
the offset in the source in the leftmost column of each
line, followed by one or more columns of data from the
source in hexadecimal. The rightmost column of each line
shows the printable characters (all others are shown as
single dots).

WWW: http://search.cpan.org/dist/Data-HexDump/