Super Globals Types

PHP superglobals are special arrays that provide access to various global variables within the PHP environment. They are accessible from anywhere in a PHP script, regardless of scope, and contain valuable information related to the current script, server, and client request. Superglobals play a crucial role in web development, as they enable developers to interact with data passed through URLs, forms, cookies, sessions, and server environment variables.

Here are the most commonly used PHP superglobals:

$_GET

Contains variables passed to the script via the URL parameters (query string) using the HTTP GET method.

$_POST

Contains variables passed to the script via an HTTP POST request, usually from form submissions.

$_REQUEST

Combines data from $_GET, $_POST, and $_COOKIE arrays into a single associative array. It can be used to access user input regardless of the request method used.

$_FILES

Contains information about uploaded files submitted via HTTP POST requests. Each uploaded file is represented as an associative array.

$_COOKIE

Contains variables stored in the user's browser cookies. Cookies are used for storing user-specific data between HTTP requests.