# phpman > man > GD::Barcode::QRcode(3pm)

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

## SYNOPSIS
    *ex. CGI*

      use [GD::Barcode::QRcode](https://www.chedong.com/phpMan.php/perldoc/GD%3A%3ABarcode%3A%3AQRcode/markdown);
      binmode(STDOUT);
      print "Content-Type: image/png\n\n";
      print [GD::Barcode::QRcode](https://www.chedong.com/phpMan.php/perldoc/GD%3A%3ABarcode%3A%3AQRcode/markdown)->new('1234567')->plot->png;

    *with UnitSize, ECC settings*

      my $oGdBar = [GD::Barcode::QRcode](https://www.chedong.com/phpMan.php/perldoc/GD%3A%3ABarcode%3A%3AQRcode/markdown)->new('123456789',
                                { Ecc => 'L', Version=>2, ModuleSize => 2}
                            );

## DESCRIPTION
    [GD::Barcode::QRcode](https://www.chedong.com/phpMan.php/perldoc/GD%3A%3ABarcode%3A%3AQRcode/markdown) is a subclass of [GD::Barcode](https://www.chedong.com/phpMan.php/perldoc/GD%3A%3ABarcode/markdown) and allows you to create QRcode barcode image
    with GD. This module based on "QRcode image CGI version 0.50 (C)2000-2002,Y.Swetake".

  new
    *$oGdBar* = [GD::Barcode::QRcode](https://www.chedong.com/phpMan.php/perldoc/GD%3A%3ABarcode%3A%3AQRcode/markdown)->new(*$sTxt*, { Ecc => *Ecc Mode*, Version => *Version*,
    ModuleSize => *Size of 1 modlue*, });

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

    Parameters:

    Ecc Ecc mode. Select 'M', 'L', 'H' or 'Q' (Default = 'M').

    Version
        Version ie. size of barcode image (Default = auto select).

    ModuleSize
        Size of modules(barcode unit) (Default = 1).

  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::QRcode](https://www.chedong.com/phpMan.php/perldoc/GD%3A%3ABarcode%3A%3AQRcode/markdown)->new('1234567');
      my $oGD = $oGdB->plot();
      # $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::QRcode](https://www.chedong.com/phpMan.php/perldoc/GD%3A%3ABarcode%3A%3AQRcode/markdown)->new('1234567');
      my $sPtn = $oGdB->barcode();

  $errStr
    $[GD::Barcode::QRcode::errStr](https://www.chedong.com/phpMan.php/perldoc/GD%3A%3ABarcode%3A%3AQRcode%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::QRcode](https://www.chedong.com/phpMan.php/perldoc/GD%3A%3ABarocde%3A%3AQRcode/markdown) module is Copyright (c) 2003 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)