Fatal error: Uncaught Error: Class 'mysqli' not found in D:\MOBILE\www\Parents\news\services\NotificationUser\DbConnect.php:22 Stack trace: #0 D:\MOBILE\www\Parents\news\services\NotificationUser\DbOperation.php(19): DbConnect->connect() #1 D:\MOBILE\www\Parents\news\services\NotificationUser\sendSinglePush.php(7): DbOperation->__construct() #2 {main} thrown in D:\MOBILE\www\Parents\news\services\NotificationUser\DbConnect.php on line 22