<html>
  <head>
    <?php $str = strtoupper(explode('.', $_SERVER['HTTP_HOST'])[0]); ?>
    <title>Welcome to <?php echo $str ?> !</title>
  </head>
  <body>
    <h1>Success! The <?php echo $_SERVER['HTTP_HOST']; ?> virtual host is working!</h1>
  </body>
</html>
