Such a global change to the php.ini config is a well known security risk and affects all other customers and isn't something we'd consider doing. However you can set that and any other variable using the method below.

You can create your own php.ini file inside whatever sub-directory your script is in. You can then determine the exact behaviour for your PHP scripts yourself.

There's a lot of documentation on how to use the various configuration features inside php.ini available at

http://php.net/manual/en/ini.php

In this case, to set "register globals" on, you can just create a file called "php.ini" in the subdirectory of your website that the script is in, simply saying:

register_globals = on