PHP $GLOBALS (super global) variable

Description

$GLOBAL is a php super global variable which can be used instead of 'global' keyword to access variables from global scope, i.e. the variables which can be accessed from anywhere in a php script even within functions or methods.

Here is an example to testify the theory mentioned above:  

<?php
$s = 25;
$t = 50;
function subtraction()
{
$GLOBALS['v'] = $GLOBALS['t'] - $GLOBALS['s'];
} 
subtraction();
echo $v;
?> 

In the code above, since v is a variable present within $GLOBALS array, it is accessible form outside the function also.

View the example of $GLOBALS variable in the browser