if (isset($_POST['make_magazine_issue'])) {
        include 'pages/Issues/Issued_Magazine_1.php';
    }
    if (isset($_POST['confirm_user'])) {
        $user_type = $_POST['user_type'];
        $user_id = $_POST['user_id'];
        if ($user_type == "student") {
            $_id = $engine->get_student_by_pid($user_id);
            if (isset($_id) && isset($_id['id'])) {
                $user = $_id;
                include 'pages/Issues/Issued_Magazine_2.php';
            } else {
                include 'pages/Issues/Issued_Magazine_1.php';
            }
        } else {
            $_id = $engine->get_teacher_id_by_name($user_id);
            if (isset($_id) && isset($_id['use_id'])) {
                $user = $_id;
                include 'pages/Issues/Issued_Magazine_3.php';
            } else {
                include 'pages/Issues/Issued_Magazine_1.php';
            }
        }
    }
} elseif (isset($_GET['page']) && $_GET['page'] == 'user_detail') {
    include 'pages/User_Detail.php';
} elseif (isset($_GET['page']) && $_GET['page'] == 'edit_book') {
    $book_id = $_POST['lib_book_id'];
    $The_Book = $engine->get_book($book_id);
    include 'pages/Edit_Book_Fields.php';
} elseif (isset($_GET['page']) && $_GET['page'] == 'edit_cd_dvd') {