There are several really useful super globals in PHP. They are as follows:

• $GLOBALS

• $_SERVER

• $_GET

• $_POST

• $_FILES

• $_COOKIE

• $_SESSION

• $_REQUEST

• $_ENV

In this lesson we shall take a look at the first of these: $GLOBALS.

As you may be aware, you can use variables within a function as follows:

The variables are only accessible from within the function and cannot be used outside of it. For example, the following would not work:

We can can the super global variables $GLOBALS to access variables outside of the scope of the function as follows:

We can also use variables from outside the scope of the function as follows:

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