404.php

<?php
require_once "config.php";
// Initialize the session
session_start();
// Generate User if User does not exists
if(!isset($_COOKIE['user'])){
$id = getGUID();
  setcookie('user', $id, time()+315400000,"/");
  $_COOKIE['user'] = $id;
}

$current_page = explode(".", $_SERVER['REQUEST_URI'])[0];

// Generates GUID for username
function getGUID(){
  mt_srand((double)microtime()*10000);//optional for php 4.2.0 and up.
  $charid = strtoupper(md5(uniqid(rand(), true)));
  $hyphen = chr(45);
  $uuid = substr($charid, 0, 8).$hyphen
        .substr($charid, 8, 4).$hyphen
        .substr($charid,12, 4).$hyphen
          .substr($charid,16, 4).$hyphen
        .substr($charid,20,12);
  return $uuid;
}

$title = 'Platform for Affective Game ANnotation';
$css = ['researcher.css', 'forms.css'];

include("header.php");
?>
    <div id="subheader">
        <h2>[Platform for Audiovisual General-purpose ANotation]</h2>
        <div class="subheader-buttons">
            <?php
                if(isset($_SESSION["loggedin"]) && $_SESSION["loggedin"] === true){
                    echo '<a class="button" href="./logout.php">log out</a>';
                } else {
                    echo '<a class="button" href="./register.php">register</a><a class="button" href="./login.php">log in</a>';
                }
            ?>
        </div>
    </div>
    <div class="page-header">
        <div>
            <p>This is an error. The place you are looking for does not exist.</p>
        </div>
    </div>
    <div class="error-msg">
        404
    </div>
<?php
    include("scripts.php");   
    $tooltip = '';
    include("footer.php");
?>