(PCC)::[How-to-Use-the-$GLOBALS[]-array-to-access-a-global-variable-from-within-a-function-in-php]::[php]
<!DOCTYPE html> <html> <body> <?php $x = 5; $y = 10; function myTest() { $GLOBALS['y'] = $GLOBALS['x'] + $GLOBALS['y']; } myTest(); echo $y; ?> </body> </html>