UNMAINTAINED -- QR code generator written in PHP. Will be able to generate QR codes for all versions and character sets.
QR Code Generator
a PHP Library to create QR Code. This is a porting library for CodeIgniter Framework, original code from http://phpqrcode.sourceforge.net/.
QR generator. Supports JPG, GIF, PNG outputs. Image size <=1480px. Error correction. Downloadable images (via content disposition)
This is a PHP library to detect and decode QR-codes. This is first and only QR code reader that works without extensions.