I have a new server install of CentOS 6.7 x86_64. I am using the qr generation code from http://phpqrcode.sourceforge.net/. When I test to see if the QR codes show up on the web page they do not. Installed: qrencode qrencode-devel libpng Permissions: removed phpqrencode/cache folder and recreated phpqrencode/cache folder, tried users root and apache with 777 permissions I do not know what piece I am missing as I have another CentOS 6.7 server that the php code works on.
