prepare("DELETE FROM buyers WHERE id = ?"); $stmt->bind_param("i", $buyerId); $stmt->execute(); $stmt->close(); $_SESSION['success'] = "Buyer deleted successfully!"; } catch (Exception $e) { $_SESSION['error'] = "Cannot delete buyer. It may be referenced in sales or payments."; error_log("Delete buyer error: " . $e->getMessage()); } header("Location: base.php"); exit(); ?>