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$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.

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



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

 

“source: http://www.w3resource.com/php/super-variables/$GLOBALS.php”

 


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