Upgrade to latest version of Codeigniter database classes on basic PHP script

I have a program in PHP which doesn't work anymore as hosting supplier has upgraded to latest version of PHP. I have some issues with the codeigniter database class and I need to upgrade it in the zip files I have the following: [login to view URL] (main program file) /database/ (codeigniter class) [login to view URL] (table + data) [login to view URL] (config file, you need to set your own DB credential) I will give you detail how to test the php script