Comments on: Using barcodes in your web application

By: sameer

sameer — Fri, 19 Mar 2010 04:01:05 +0000

The barcode class accepts the following 3 formats: png, gif, jpg. Try using the gif format in the draw function.

Image_Barcode::draw($bar_code_data, ‘code128′, ‘gif’);

The ASCII garbage is actually the png graphic, which for some reason your browser is not able to understand. The php barcode sends the image generated with the ‘Content-Type: image/png’ headers, so that the browser can recognize it as a png document and render it as such. If the browser is unable to recognize the format then it will display the data in the raw format as above.

By: Tom

Tom — Thu, 18 Mar 2010 18:37:45 +0000

Ok I found my problem related to path in both the Pear Library location on the server and the include reference in the CODE128 file in the Barcode sub-directory.

That’s all working. I’ve verified that I have an updated GD library installed and working.

I’m getting the following ASCII garbage where the code128 barcode should be…

‰PNG �� IHDR��7��<��øÒ°Æ��PLTE��ÿÿÿ¥ÙŸÝ��IDAT•cøºr²Åò£4i0 9 �~7…m “��IEND®B`‚

Any suggestions?

By: Tom

Tom — Thu, 18 Mar 2010 17:55:04 +0000

Nifty tutorial, thanks! I have the Image_Barcode Pear library installed, but I have no idea where to find the ” require_once ‘Barcode.php’; ” referenced in your sample.

Did I miss something?

By: sameer

sameer — Tue, 09 Feb 2010 10:44:42 +0000

You will need to make some changes in the Barcode class files for the appropriate barcode type. So if you are using the ‘code128′ barcode type, you can change the height and width in the ‘code128.php’ file. But note that the sizes in the code are calculated, manually changing the sizes can render the barcode unreadable.

By: Divyesh Karelia

Divyesh Karelia — Tue, 09 Feb 2010 10:21:08 +0000

nice tutorial for generating a barcode.

i want to create high resolution image of that barcode. is it possible using this library or other trick for ….

By: Das

Das — Thu, 05 Nov 2009 05:46:15 +0000

Nice tutorial Sameer. Keep going

By: sameer

sameer — Tue, 27 Oct 2009 07:27:27 +0000

Try the following path:

require_once ‘Image/Barcode.php’;

By: deep

deep — Tue, 27 Oct 2009 06:50:23 +0000

Thanks for the tutorial.I have install the pear Image_Barcode-1.1.0 package.But i got an error “Warning: require_once(Barcode.php) [function.require-once]: failed to open stream”

By: sameer

sameer — Tue, 08 Sep 2009 10:30:54 +0000

Well if you selling your own products, you can use it to print UPC bar codes or if you are selling some products from a e-commerce application, you can generate a barcode for each delivery from your end, print it and attach it to the delivery package for tracking. The main point is that being a standard the barcode information you create can be read by any scanner.

By: io

io — Tue, 08 Sep 2009 07:48:27 +0000

What is the use with php ?