Fatal error: Uncaught Error: Undefined constant "DB_HOST" in /home/u622478576/domains/nieo.in/public_html/hospital/config/database.php:19 Stack trace: #0 /home/u622478576/domains/nieo.in/public_html/hospital/core/Database.php(21): require() #1 /home/u622478576/domains/nieo.in/public_html/hospital/core/Database.php(58): Database->__construct() #2 /home/u622478576/domains/nieo.in/public_html/hospital/core/BaseModel.php(17): Database::getInstance() #3 /home/u622478576/domains/nieo.in/public_html/hospital/app/Controllers/AuthController.php(18): BaseModel->__construct() #4 /home/u622478576/domains/nieo.in/public_html/hospital/public/index.php(242): AuthController->__construct() #5 {main} thrown in /home/u622478576/domains/nieo.in/public_html/hospital/config/database.php on line 19