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Warning: Undefined variable $dbname in C:\xampp\htdocs\hrmanagement\8 view att\s8.php on line 10

Fatal error: Uncaught mysqli_sql_exception: No connection could be made because the target machine actively refused it in C:\xampp\htdocs\hrmanagement\8 view att\s8.php:10 Stack trace: #0 C:\xampp\htdocs\hrmanagement\8 view att\s8.php(10): mysqli->__construct(NULL, 'root', Object(SensitiveParameterValue), NULL) #1 {main} thrown in C:\xampp\htdocs\hrmanagement\8 view att\s8.php on line 10