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<!DOCTYPE html> <html> <body> <?php // Variable to check $ip = "2001:0db8:85a3:08d3:1319:8a2e:0370:7334"; // Validate ip as IPv6 if (!filter_var($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> </html>
2001:0db8:85a3:08d3:1319:8a2e:0370:7334 is a valid IPv6 address
