Calling all PHP “SUPERGLOBALS”

In PHP there are a set of variables called "SuperGlobals". These variables are of a special type and they carry along with them their own set of rules that define when and where they are available, called their scope.

The only difference between SuperGlobals and normal variables is; they can be seen everywhere in your scripts.

A list of these are as follows :

$GLOBALS

Holds an array of all global variables.

$_SERVER

Holds an array of all server enviroment variables.

$_GET

Holds an array of all the varialbes passed to the script through the GET method.

$_POST

Holds an array of all the varialbes passed to the script through the POST method.

$_REQUEST

Holds an array of all the varialbes passed to the script through the GET and POST methods, otherwise called user input variables.

$_COOKIE

Holds an array of all the cookie variables.

$SESSION

Holds an array of all the session variables.

$_FILES

Holds an array of all the variables associated to file uploads.

$_ENV

Holds an array of all the enviroment variables.