# phpman > perldoc > GD::Barcode::UPCE

## NAME
    [GD::Barcode::UPCE](https://www.chedong.com/phpMan.php/perldoc/GD%3A%3ABarcode%3A%3AUPCE/markdown) - Create UPC-E 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::UPCE](https://www.chedong.com/phpMan.php/perldoc/GD%3A%3ABarcode%3A%3AUPCE/markdown)->new('123456')->plot->png;

    *with Error Check*

      my $oGdBar = [GD::Barcode::UPCE](https://www.chedong.com/phpMan.php/perldoc/GD%3A%3ABarcode%3A%3AUPCE/markdown)->new('123456789');
      die $[GD::Barcode::UPCE::errStr](https://www.chedong.com/phpMan.php/perldoc/GD%3A%3ABarcode%3A%3AUPCE%3A%3AerrStr/markdown) unless($oGdBar);       #Invalid Length

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

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

    Constructor. Creates a [GD::Barcode::UPCE](https://www.chedong.com/phpMan.php/perldoc/GD%3A%3ABarcode%3A%3AUPCE/markdown) object for *$sTxt*. *$sTxt* has 6 or 7 or 8 numeric
### characters
    and calculates CD for you. If *$sTxt* has 7 characters, this module calaculates CD for you.

  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::UPCE](https://www.chedong.com/phpMan.php/perldoc/GD%3A%3ABarcode%3A%3AUPCE/markdown)->new('123456');
      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', 'G' and '0'. '1' means black, 'G' also means black
    but little bit long, '0' means white.

     ex.
      my $oGdB = [GD::Barcode::UPCE](https://www.chedong.com/phpMan.php/perldoc/GD%3A%3ABarcode%3A%3AUPCE/markdown)->new('123456');
      my $sPtn = $oGdB->barcode();
      # $sPtn = '';

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