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<!DOCTYPE html> <html> <body> <?php $ip = "127.0.0.1"; if (!filter_var($ip, FILTER_VALIDATE_IP) === false) { echo("$ip is a valid IP address"); } else { echo("$ip is not a valid IP address"); } ?> </body> <!-- Mirrored from www.w3schools.com/php/phptryit.asp?filename=tryphp_filter5 by HTTrack Website Copier/3.x [XR&CO'2014], Tue, 07 Jun 2022 19:58:25 GMT --> </html>
127.0.0.1 is a valid IP address