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PHP Manual :: $GLOBALS

Superglobals || $_SERVER || Predefined Variables || PHP Manual

(PHP 4, PHP 5, PHP 7)

$GLOBALSReferences all variables available in global scope


An associative array containing references to all variables which are currently defined in the global scope of the script. The variable names are the keys of the array.


Example #1 $GLOBALS example

function test() {
$foo "local variable";

'$foo in global scope: ' $GLOBALS["foo"] . "\n";
'$foo in current scope: ' $foo "\n";

$foo "Example content";

The above example will output something similar to:

$foo in global scope: Example content
$foo in current scope: local variable



This is a 'superglobal', or automatic global, variable. This simply means that it is available in all scopes throughout a script. There is no need to do global $variable; to access it within functions or methods.

Note: Variable availability

Unlike all of the other superglobals, $GLOBALS has essentially always been available in PHP.

Superglobals || $_SERVER || Predefined Variables || PHP Manual
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