PHP snippet uber-panel

<?php

    /* --------------------------------------------------------
     * Uber Panel :: A prive licenced Content Management Panel
     * --------------------------------------------------------
     *
     * Copyright (C) Finley Siebert. All rights reserved
     * [email protected]
     * 2013 - 2014
     *
     * --------------------------------------------------------
     */

    $sitename = "uber-panel";
    $url = "http://finleyhd.nl/uber-panel";

    error_reporting(E_ALL);

    session_start();

    $conn = new MySQLi("localhost", "", "", "finley_uber-panel");

    if($conn->connect_errno){
        echo"<div class='announcement fail'>Uber Panel -> ". $conn->connect_error ."</div>";
    }

    class User {
        public function __construct($session) {
            $this->session = $session;
        }

        public function grabData($k) {
            global $conn;

            $q = $conn->query("SELECT * FROM users WHERE email='$this->session'") or die(mysqli_error());
            $r = mysqli_fetch_assoc($q);

            return $r[$k];
        }
    }

    $user = new User($_SESSION['email']);


    $username = $user->grabData('username');
    $user_query = $conn->query("SELECT * FROM `private_messages` WHERE `touser` = '$username' AND `mark` = 0") or die($conn->error);

    $unread_messages = $user_query->num_rows;
    $secret_hash = "cbf28fe95080b7ab82135d105a5026be";

    $main_story = '
    Welcome to <font color="#89c9cd">Uber-Panel</font>!<br />
    My name is <b>Finley</b> and I am the system administrator. You can ask me anything you want, just PM!<br />
    Before you continue you must now a few things!<br /><br />
    - Your ip is logged, so dont try anything suspisius.<br />
    - Be aware that this is an BETA version of the system and not fully developed yet<br />
    - Have fun <br />
    - Please report any bugs <br />
    - If you think there is something wrong, please send a pm to finley<br /><br />

    If you act normal, and use the site were it is ment for, nothing is wrong. I asure you that there will be more!<br /><br />
    Enjoy<br />
    Finley
    ';
?>