The first problem raised by your host isn't a problem with the PHP, that's fine, it's a problem with your web host not reading the installation instructions.

The second is, I suspect, because you have asked your host to install the version of the updater intended for servers that use a proxy for CURL, so some of the environment constants are missing.

I would recommend that you aks her to install the original version (i.e. the one in the "free software add-ons" area, which is inteneded for normal setups.