<!DOCTYPE html>
<html>
<body>
<?php
// Variable to check
$url="http://www.w3schoolsÅÅ.com";
// Encode characters and remove all characters with ASCII value > 127
$url = filter_var($url, FILTER_SANITIZE_ENCODED, FILTER_FLAG_STRIP_HIGH);
echo $url;
?>
</body>
</html>