# GD::Barcode - perldoc - [phpMan]

## NAME
    [GD::Barcode](https://www.chedong.com/phpMan.php/perldoc/GD%3A%3ABarcode/markdown) - Create barcode image with GD

## SYNOPSIS
    *ex. CGI*

      use [GD::Barcode::UPCE](https://www.chedong.com/phpMan.php/perldoc/GD%3A%3ABarcode%3A%3AUPCE/markdown);
      binmode(STDOUT);
      print "Content-Type: image/png\n\n";
      print [GD::Barcode](https://www.chedong.com/phpMan.php/perldoc/GD%3A%3ABarcode/markdown)->new('EAN13', '123456789012')->plot->png;

    *with Error Check*

      my $oGdBar = [GD::Barcode](https://www.chedong.com/phpMan.php/perldoc/GD%3A%3ABarcode/markdown)->new('EAN13', '12345678901');
      die $[GD::Barcode::errStr](https://www.chedong.com/phpMan.php/perldoc/GD%3A%3ABarcode%3A%3AerrStr/markdown) unless($oGdBar);     #Invalid Length
      $oGdBar->plot->png;

## DESCRIPTION
    [GD::Barcode](https://www.chedong.com/phpMan.php/perldoc/GD%3A%3ABarcode/markdown) is a subclass of GD and allows you to create barcode image with GD. This module
    based on "Generate Barcode Ver 1.02 By Shisei Hanai 97/08/22".

    From 1.14, you can use this module even if no GD (except plot method).

  new
    *$oGdBar* = [GD::Barcode::UPCE](https://www.chedong.com/phpMan.php/perldoc/GD%3A%3ABarcode%3A%3AUPCE/markdown)->new(*$sType*, *$sTxt*);

    Constructor. Creates a [GD::Barcode](https://www.chedong.com/phpMan.php/perldoc/GD%3A%3ABarcode/markdown)::*$sType* object for *$sTxt*.

  plot()
    *$oGd* = $oGdBar->plot([Height => *$iHeight*, NoText => *0 | 1*]);

    creates GD object with barcode image for the *$sTxt* specified at "new" method. *$iHeight* is
    height of the image. If *NoText* is 1, the image has no text image of *$sTxt*.

     ex.
      my $oGdB = [GD::Barcode](https://www.chedong.com/phpMan.php/perldoc/GD%3A%3ABarcode/markdown)->new('EAN13', '123456789012');
      my $oGD = $oGdB->plot(NoText=>1, Height => 20);
      # $sGD is a GD image with Height=>20 pixels, with no text.

  barcode()
    *$sPtn* = $oGdBar->barcode();

    returns a barcode pattern in string with '1' and '0'. '1' means black, '0' means white.

     ex.
      my $oGdB = [GD::Barcode](https://www.chedong.com/phpMan.php/perldoc/GD%3A%3ABarcode/markdown)->new('UPCE', '123456789012');
      my $sPtn = $oGdB->barcode();
      # $sPtn = '';

  $errStr
    $[GD::Barcode::errStr](https://www.chedong.com/phpMan.php/perldoc/GD%3A%3ABarcode%3A%3AerrStr/markdown)

    has error message.

  $text
    $oGdBar->{$text}

    has barcode text based on *$sTxt* specified in "new" method.

## AUTHOR
    Kawai Takanori <GCD00051@nifty.ne.jp>

## COPYRIGHT
    The [GD::Barocde](https://www.chedong.com/phpMan.php/perldoc/GD%3A%3ABarocde/markdown) module is Copyright (c) 2000 Kawai Takanori. Japan. All rights reserved.

    You may distribute under the terms of either the GNU General Public License or the Artistic
    License, as specified in the Perl README file.

## SEE ALSO
    GD [GD::Barcode](https://www.chedong.com/phpMan.php/perldoc/GD%3A%3ABarcode/markdown) subclasses