<html>
<head>
    <style>
        .centered {
            position: fixed;
            top: 50%;
            left: 50%;
            /* bring your own prefixes */
            transform: translate(-50%, -50%);
            text-align:center;
        }
    </style>
</head>
<body>
    <div class="centered">
        <img src="trash.png"/>
        <br>
        <?php echo date("Y-m-d H:s"); ?>
    </div>
</body>
</html>
