mysqli_report(MYSQLI_REPORT_ERROR | MYSQLI_REPORT_STRICT);
$link = mysqli_connect($host, $user, $pass, $db_name);
$link->set_charset("utf8mb4");
$sql = "SELECT * FROM users WHERE id=?";
$stmt = $conn->prepare($sql);
$stmt->bind_param("s", $_SESSION['user']);
$stmt->execute();
$result = $stmt->get_result();
$user = $result->fetch_assoc();
$balance = $user['balance']