$GLOBALS is a superglobal variable, which is also an array that stores all the global scope variables and is used to access global variables from anywhere in the PHP program.
Example:
<?php
$x = 10;
$y = 11;
function add() {
$GLOBALS['z'] = $GLOBALS['x'] + $GLOBALS['y'];
}
add();
echo $z;
?>
Output:
21
