<html><body>// Variable to check$ip = "2001:0db8:85a3:08d3:1319:8a2e:0370:7334";// Validate ip as IPv6if (!filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6) === false) { echo("$ip is a valid IPv6 address");} else { echo("$ip is not a valid IPv6 address");}</body><!-- Mirrored from www.w3schools.com/php/phptryit.asp?filename=tryphp_filter_adv2 by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 02:50:47 GMT --></html>