One way to find your account PHP settings is to upload a PHP info script. This works on any account that supports PHP.

Create a new text file containing the following line:

?php phpinfo(); ?>

Save this file as info.php.

Upload it to the root of any website.

After you upload it, go to http://your domain name/info.php

Viewing this page will show you what version of PHP you are running, as well as all of the installed PHP modules and their settings.