What is the role of php super global variables

The function of php super global variables is to make many predefined variables available in the entire scope of a script, and they can be accessed in functions or methods without executing "global $variable;".

php super global variables

Super global variables were introduced in PHP 4.1.0. Built-in variables are always available in all scopes.

PHP Global Variables - Superglobal Variables

Many of the predefined variables in PHP are "superglobal", which means they are available throughout the entire scope of a script. They can be accessed within a function or method without executing global $variable;.

These super global variables are:

$GLOBALS
$_SERVER
$_REQUEST
$_POST
$_GET
$_FILES
$_ENV
$_COOKIE
$_SESSION

Please visit the "Super Global Variables" chapter: https://www.php.cn/php/php-superglobals.html

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