<html><body>$int = 100;if (!filter_var($int, FILTER_VALIDATE_INT) === false) { echo("Integer is valid");} else { echo("Integer is not valid");}</body><!-- Mirrored from www.w3schools.com/php/phptryit.asp?filename=tryphp_filter3 by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 02:29:33 GMT --></html>