Thomas Bätzler <t.baetz...@bringe.com> writes: [...]
> > I hope this answers your question ;-) > > Cheers, > Thomas Thanks for the effort, but I'm still a bit confused. Just need to think it over some more maybe. Is it fair to say that the `magic' open is far and away the most common working case? And that the 3 arg open is for unusual circumstances? Shawn H Corey <shawnhco...@gmail.com> writes: > Harry Putnam wrote: >> Is there something beyond style that makes those methods better than >> what appears to be a simpler format > > Yes. The greatest issue is code injection. This is especially true > for the abbreviated form of the two argument open: > > open my $fh, $file or die "could not open $file: $!\n"; > > What if the user gave this as $file? > > rm -fr ~ Not to be argumentative here... but maybe I can't see as quickly as some what this would do. I can't really visualize what would happen there... wouldn't the open just fail? Further do we need to prepare for a vastly ridiculous file name? > This should be avoid, especially in server code like CGIs. > > Secondarily, the three argument open allows you to skip using binmode. > > open my $fh, '<:encoding(utf8)', $file or die "could not open $file: > $!\"; > > Or > > use GD; > my $img = GD::Image->new( 1800, 1200 ); > # draw the picture > > open my $png, '>:raw', 'image.png' or die "could not open image.png: > $!\n"; > print $png $img->png() or die "could not print to image.png: $!\n"; > close $png or die "could not close image.png: $!\n"; > Sorry, I'd have to do quite a bit of homework before I understand what that is about. I'm still at the level where basic simple opens of reasonably named files is about all I run into. -- To unsubscribe, e-mail: beginners-unsubscr...@perl.org For additional commands, e-mail: beginners-h...@perl.org http://learn.perl.org/
