benjibee/maintenance.php

## maintenance.php
<?php

// place in wp-content directory to
// automatically override default page

http_response_code(503);
wp_load_translations_early();

?><!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title><?php _e('Maintenance'); ?></title>
</head>
<body>
    <h1><?php _e('Maintenance'); ?></h1>
    <p><?php _e('Briefly unavailable for scheduled maintenance. Check back in a minute.'); ?></p>
    <script>
        (function check_status() {
            "use strict";

            var xhr = new XMLHttpRequest();

            xhr.open("HEAD", window.location, true);

            xhr.addEventListener("load", function () {
                if (xhr.status >= 200 && xhr.status < 400) {
                    window.location.reload();
                } else {
                    setTimeout(check_status, 3000);
                }
            });

            xhr.addEventListener("error", function () {
                setTimeout(check_status, 3000);
            });

            xhr.send();
        })();
    </script>
</body>
</html>
	<?php

	// place in wp-content directory to
	// automatically override default page

	http_response_code(503);
	wp_load_translations_early();

	?><!DOCTYPE html>
	<html>
	<head>
	<meta charset="UTF-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<meta http-equiv="X-UA-Compatible" content="ie=edge">
	<title><?php _e('Maintenance'); ?></title>
	</head>
	<body>
	<h1><?php _e('Maintenance'); ?></h1>
	<p><?php _e('Briefly unavailable for scheduled maintenance. Check back in a minute.'); ?></p>
	<script>
	(function check_status() {
	"use strict";

	var xhr = new XMLHttpRequest();

	xhr.open("HEAD", window.location, true);

	xhr.addEventListener("load", function () {
	if (xhr.status >= 200 && xhr.status < 400) {
	window.location.reload();
	} else {
	setTimeout(check_status, 3000);
	}
	});

	xhr.addEventListener("error", function () {
	setTimeout(check_status, 3000);
	});

	xhr.send();
	})();
	</script>
	</body>
	</html>