<html><body>$x = 5;$y = 10;function myTest() { global $x, $y; $y = $x + $y;} myTest(); // run functionecho $y; // output the new value for variable $y</body><!-- Mirrored from www.w3schools.com/php/phptryit.asp?filename=tryphp_var_global_keyword by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 02:29:30 GMT --></html>