<html><body>$str = "<h1>Hello World!</h1>";$newstr = filter_var($str, FILTER_SANITIZE_STRING);echo $newstr;</body><!-- Mirrored from www.w3schools.com/php/phptryit.asp?filename=tryphp_filter2 by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 02:29:33 GMT --></html>