<!Doctype html>
<html xmlns=http://www.w3.org/1999/xhtml>
<head>
<meta http-equiv=Content-Type content="text/html;charset=utf-8">
<meta content=always name=referrer>
<title>welcome</title>
</head>
<body>
<?php
$host = $_SERVER['HTTP_HOST'];
if (strstr($host, "x.com") ) {
require "x/index.html";
}
elseif (strstr($host, "y.com") ) {
require "y/index.php";
}
else {
echo "welcome";
}
?>
</body>
</html>