Untitled

<html>
<meta charset=utf-8>
<body>
<p>welcome to the game!</p>
<?php
$input=$_GET["xss"];
$clearspace= preg_replace('/\s+/', '', $input);
$filterslash=str_replace("/","",$clearspace);
$filtered=htmlspecialchars($filterslash);
if (mb_strlen($filtered,'utf-8') < 16)
{
$normalized=Normalizer::normalize($filtered, Normalizer::FORM_KD);echo $normalized;
}
?>
</body></html>