OK, so the installation using php5.5 worked succesfully, rebooted and tried to download image to a machine and encountered a chain load error and could not boot.
http://172.16.61.17/fog/service/ipxe/boot.php …Input/output error
Could not boot: Input/output error
Chainloading failed, hit ‘s’ for the ipxe shell; reboot in 10 seconds