EAN-13 barcodes using php
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README.md

php-barcode

About

This is a re-working of php-barcode by Folke Ashberg. Currently, my version only creates EAN-13 barcodes, however I plan to make the source modular to allow for additions of ISBN, Code 12, and others.

Why

Folke did a lot of good work, but it is nigh unreadable, I think, and I wanted to fix that. Because of this, too, it is really hard to add newer barcode types.

I also needed an on-the-fly barcode solution for a freelance job. This code has been in production for several years.

Requirements

How do I use this?

The signatures are fairly simple. Simply call barcode with the number of the barcode and the scale of the barcode as an integer. The number needs to be either 12 or 13 digits. The barcode will always be 13 digits even if only 12 are supplied as the 13th digit is the checksum of the first 12. The barcode's scale will not go lower than 2 for scaling reasons and no higher than 12 for memory reasons. A scale of 4 has worked well for my purposes in the past.

$barcode = new Barcode(1349875921348, 4);
$barcode = new Barcode(439457143245, 10);

The key thing to keep up with is the FreeSansBold.ttf file. By default the Barcode class will look into PHP's calling directory for the font file. You can specify a path as a third parameter.

$barcode = new Barcode(123456789120, 4, "/path/to/FreeSansBold.ttf");

There are only two public methods: image() and display(). The first function image() returns the PHP created image as a reference. This may be used to save an image to file, e.g. imagepng($barcode->image(), "/path/to/storage/barcode.png"). The second function display() simply calls the correct headers and displays the barcode in the browser. Useful for debugging.