Gute Idee! Serverseitig evntl. so
if( $self->param('cc') ){
my $fpnr = $self->param('fpnr');
$fpnr =~ s/,/\./;
$self->header("Content-Type","text/html");
$self->{CONTENT} = eval{
$self->ents( sprintf "%0.3f: %02X %02X %02X %02X", $fpnr, unpack("CCCC", pack "f", $fpnr));
} || "Falsches Format!";
}