PHP function imageline on localhost works, but on VPS cloud hosting doesn't. I guess I have download something, but I don't know what. Could you give me a hand?
P.S. PHP GD is already downloaded.
Downloaded or installed?
It isn't enough to just download it, you need to install and enable it. You didn't provide what OS is there on your VPS, so I can't say how exactly. In CentOS/RHEL/Fedora you can do it by using