GoDaddy, eh. So you do not have control over .htaccess. IIRC that is where you put your php.ini definition. I guess they have defined it for you as php5.ini.
In case you find you're really concerned about security, you may want better tech support. When that time comes, you may want to move your site to a different host. I use and recommed ChiHost, also LiquidWeb.
Best, ~Ray