PHP QR Code
You can provide data in GET parameter: like that
Fatal error: Uncaught Error: Call to undefined function imagecreate() in C:\emc3\Apache24\htdocs\EMC3\qrcode\qrimage.php:74
Stack trace:
#0 C:\emc3\Apache24\htdocs\EMC3\qrcode\qrimage.php(32): QRimage::image(Array, 4, 2)
#1 C:\emc3\Apache24\htdocs\EMC3\qrcode\qrencode.php(494): QRimage::png(Array, 'C:\\emc3\\Apache2...', 4, 2, false)
#2 C:\emc3\Apache24\htdocs\EMC3\qrcode\qrencode.php(286): QRencode->encodePNG('PHP QR Code :)', 'C:\\emc3\\Apache2...', false)
#3 C:\emc3\Apache24\htdocs\EMC3\qrcode\index.php(67): QRcode::png('PHP QR Code :)', 'C:\\emc3\\Apache2...', 'L', 4, 2)
#4 {main}
thrown in C:\emc3\Apache24\htdocs\EMC3\qrcode\qrimage.php on line 74