Package which provides a method to create UPC-A barcode using GD library.
Slightly Modified Ean13.php to get Upca.php I needed a way to print UPC-A bar codes on a PHP page. The Image_Barcode2 class seemed like the best way to do it, so I modified ean13 to print in the UPC-A format. Checked the bar code tables against some documentation below (no errors) and validated the changes with my trusty cue-cat. http://www.indiana.edu/~atmat/units/barcodes/bar_t4.htm