One of the first things you should learn how to do with PHP, is getting all the info about your PHP installation.
Sometimes you’ll see a script that says it requires a certain setting to be one way. If you don’t know, you could be purchasing something you can’t use.
It is as simple as making a script, and naming it something like phpinfo.php – I’d recommend naming it something else, so people can’t run it themselves. The less one knows about your setup, the harder it is to be mischeaveous.
<?php
phpinfo();
?>
It’s that simple. You’ll then get a full page of information about your PHP Installation.