Fatal error: Uncaught Exception: Database connection failed. Please contact the administrator. in C:\xampp\htdocs\nkhos\app\class\Database.php:36 Stack trace: #0 C:\xampp\htdocs\nkhos\app\class\Database.php(46): App\class\Database::getConnection() #1 C:\xampp\htdocs\nkhos\app\class\Manager.php(110): App\class\Database::db() #2 C:\xampp\htdocs\nkhos\inc\header.php(10): App\class\Manager::getManagerWithCategory(0) #3 C:\xampp\htdocs\nkhos\index.php(2): include_once('C:\\xampp\\htdocs...') #4 {main} thrown in C:\xampp\htdocs\nkhos\app\class\Database.php on line 36