<body>
<?php
include 'header.php';
?>
<?php
session_start();
if (!isset($_SESSION["session_name"])) {
header("Location:../index.php");
exit;
} else {
$id = $_SESSION["session_name"];
require_once 'db_functions.php';
$db = new db_functions();
$user_profile = $db->FindUser($id);
}
?>
<div class="row">
<div class="col-sm-5 col-sm-offset-1">
<div class="flip">
<div class="card" >
<div class="face front"
style=" background-image: url('images/androids.jpg'); background-size: 100% 100%; background-repeat: no-repeat;" > </div>
<div class="face back" style="border-bottom: 13px solid #283848">
<span style="font-family:Arial, Helvetica, sans-serif">
<h2 style="font-family: Gill Sans , Gill Sans MT, sans-serif;color: #283848">Introduction to Android Development</h2>
<h4 style=" font-family:Arial, Helvetica, sans-serif;; color:#404040; align:left;">   Learn the basics of Android and Java programming, and take the first step on your journey to becoming an Android developer!</h4>
<span style="position: absolute; margin-top:-5vw;margin-left:5vw;"><a class="btn btn-warning " href="<?php
if ($user_profile["role"] == "instructor") {
