PHP TutorialLesson 22Free preview

PHP Superglobals

This lesson is part of PHP · All levels

Summary

Superglobals are PHP-inbuilt variables that are always available across scripts without the need for global declaration. For example $_GET, $_POST, $_REQUEST, $_COOKIE, $_SESSION, $_SERVER, and $_FILES. This lesson introduces the use of each, particularly for reading data from forms and user requests.

Key points

Superglobals are always accessible from anywhere in PHP script.
$_GET reads the data from the URL, $_POST reads the data form method POST
$_REQUEST contains a combination of GET, POST, and COOKIE data
The input from the superglobal must be validated before use

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