<html><body> // variable $user is the value of $_GET['user'] // and 'anonymous' if it does not exist echo $user = $_GET["user"] ?? "anonymous"; echo("<br>"); // variable $color is "red" if $color does not exist or is null echo $color = $color ?? "red"; </body><!-- Mirrored from www.w3schools.com/php/phptryit.asp?filename=tryphp_oper_null_coalescing by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 02:29:31 GMT --></html>