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<?php /** * NEXUS Commerce - Database Connection Manager (db.php) */ require_once __DIR__ . '/config.php'; $pdo = null; try { // Attempt MySQL Connection $dsn = "mysql:host=" . DB_HOST . ";dbname=" . DB_NAME . ";charset=" . DB_CHARSET; $options = [ PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION, PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC, PDO::ATTR_EMULATE_PREPARES => false, ]; $pdo = new PDO($dsn, DB_USER, DB_PASS, $options); } catch (PDOException $e) { // Fallback to SQLite if MySQL fails (e.g. MySQL server not running or DB not created yet) try { if (file_exists(SQLITE_PATH)) { $pdo = new PDO("sqlite:" . SQLITE_PATH); $pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION); $pdo->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_ASSOC); } else { throw $e; } } catch (Exception $fallbackErr) { die("Database Connection Error: " . $e->getMessage()); } } // Alias variables for flexibility across codebase $db = $pdo; $conn = $pdo; /** * Helper function to return active PDO database instance * @return PDO */ function getDB() { global $pdo; return $pdo; }
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