$username = $_POST['lusername'];
$password = $_POST['lpassword'];
$query = $connect->prepare("SELECT * FROM users WHERE username='$username'");
// $query->bindParam(':username',  $username);
$query->execute(array($username));
$execute = $query->fetch();
$id = $execute[id];
if ($execute == 0) {
    $_SESSION['message'] = "User with that email or username doesn't exist";
    header("location: error.php");
}
if (password_verify($_POST['lpassword'], $execute['password'] ) ) {
    function userislogged() {
        $_SESSION['logged_in'] = true;
        return $_SESSION['logged_in'];
    }
    $_SESSION['id'] = $id;
    header("location: dashboard.php");
} else {
    $_SESSION['message'] = 'Cannot verify password.';
    header("location: error.php");
}

session_start();
session_regenerate_id();
if (!userislogged == true) {
    $_SESSION['message'] = "You must be logged in to use this section";
    header("location: error.php");
} else {
    $email = $_SESSION['email'];
    $id = $_SESSION['id'];
}