in reply to file handing

#!/usr/bin/perl

use strict;
use warnings;
use autodie;

my $OLDFILE = '02190.JPG';
my $NEWFILE = 'img/09911.JPG';

open my $fh, '<', $OLDFILE;
binmode $fh;
my $data = join '', <$fh>;
close   $fh;

open    $fh, '>', $NEWFILE;
binmode $fh;
print   $fh $data;
close   $fh;

print "Copied $OLDFILE to $NEWFILE\n";

[download]

Replies are listed 'Best First'.
Re^2: file handing
by bigup401 (Pilgrim) on Sep 23, 2018 at 14:07 UTC

    thanks but i know file handling. the only problem i have am trying to play around it for more knowledge

    the problem. is now getting file with zero byte. the debt was someone telling me u cant rename, write, read and check image extension with built in funcation open() that i have to use module like image magick bra bra bra. but i know i can archive this without any single module using only built in function open(). and so far here is my code works well the problem i have now is the file uploaded in zero byte. that means cant open

    my $photo = $CGI->param("pic")
my $copydir = 'img';
my ($file_extension) = $photo =~ /([^.]+)$/; #get photo extension 
my $newf = "011190.$file_extension";         #rename photo to its exte
+nsion to keep the original  resolutions of the file 
rename($photo, $newf);
$upload = $CGI->upload("pic");
open ( UPLOADFILE, ">$copydir/$newf");
close UPLOADFILE;

    [download]
[reply]
[d/l]
      "... i know file handling...trying to play around it for more knowledge..."

      Sure. No doubt. But now become more modern and try something like use Path::Tiny; path("nose.jpg")->copy("cuke.jpg");. Not tested - guaranteed.

      «The Crux of the Biscuit is the Apostrophe»

      perl -MCrypt::CBC -E 'say Crypt::CBC->new(-key=>'kgb',-cipher=>"Blowfish")->decrypt_hex($ENV{KARL});'Help

[reply]
[d/l]
[select]
      You forgot to print $upload to UPLOADFILE: 
      
$upload = $CGI->upload("pic");

open    UPLOADFILE, ">", "$copydir/$newf";
binmode UPLOADFILE;
print   UPLOADFILE $upload; # YOU FORGOT THIS! :-)
close   UPLOADFILE;

      [download]
      Also try these lines at the top of your script to more easily spot any errors: 
      
use autodie;
use CGI::Carp qw(warningsToBrowser fatalsToBrowser);

      [download]
[reply]
[d/l]
[select]

        ya ma using warnings to browser. but this problem still occur

        Can't rename(IMG8823.jpg, '011190.jpg'): No such file or directory

        [download]
[reply]
[d/l]

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