prepare("SELECT balance FROM users WHERE id = ?"); $stmt->execute([$user_id]); $usdt_balance = $stmt->fetchColumn(); $user_assets['USDT'] = (float)($usdt_balance ?: 0); $stmt = $db->prepare("SELECT symbol, amount FROM user_assets WHERE user_id = ?"); $stmt->execute([$user_id]); $assets_data = $stmt->fetchAll(PDO::FETCH_KEY_PAIR); if ($assets_data) { foreach ($assets_data as $symbol => $amount) { $user_assets[$symbol] = (float)$amount; } } } ?>