Untitled

<?php $headers = getallheaders(); ?>
<?php if (array_key_exists('X-Requested-With', $headers) AND $headers['X-Requested-With'] === 'XMLHttpRequest'): ?>
<?php print_r($_SERVER); ?>
<?php else: ?>
<html>
<head>
    <meta http-equiv="Content-type" content="text/html; charset=utf-8">
    <title>jquery.basic.auth</title>

</head>
<body>
    <script src="jquery-1.6.1.min.js" type="text/javascript" charset="utf-8"></script>
    <script type="text/javascript" charset="utf-8">
jQuery(document).ready(function ($, undefined) {
    $.ajax({
        url: 'index.php',
        username: 'user',
        password: 'pass',
        success: function (data) {
            console.log(data);
        }
    });
});
    </script>
</body>
</html>
<?php endif; ?>