Sometimes you need to check if the settings you applied to PHP is actually used by the server, and GD Press Tools Pro offers quick overview as well as detailed information for PHP and mySQL on your server.
If you open GD Press Tools Pro main page you will see quick info. If you are using WordPress multisite/network installation, this info is available only for network admins. Here is the screenshot with example values:
All data here is pretty much self explanatory. And if you need detailed PHP and mySQL info, you can open Environment panel in the GD Press Tools Pro menu. This panel also contains list of all defined PHP constants.