connect_error) { error_log("Database connection failed: " . $conn->connect_error); // Log error // Set konstanta untuk dicek di index.php define('DB_CONNECTION_ERROR', true); // Opsi: Pesan error lebih detail (Hanya untuk development, jangan di produksi) // define('DB_CONNECTION_ERROR_MESSAGE', "Database connection failed: " . $conn->connect_error); } else { define('DB_CONNECTION_ERROR', false); } ?> | Pusat Sumber Belajar FEB UI

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Advances in the economics of energy and resouces

(Moroney, John R. Pindyck, Robert S.)