Warning: session_start(): Cannot start session when headers already sent in E:\wwwroot\asw229\includes\common.php on line 10

Fatal error: Uncaught PDOException: could not find driver in E:\wwwroot\asw229\includes\lib\PdoHelper.php:18 Stack trace: #0 E:\wwwroot\asw229\includes\lib\PdoHelper.php(18): PDO->__construct('mysql:host=loca...', 'txt2', '50990610') #1 E:\wwwroot\asw229\includes\common.php(29): lib\PdoHelper->__construct(Array) #2 E:\wwwroot\asw229\index.php(5): include('E:\\wwwroot\\asw2...') #3 {main} thrown in E:\wwwroot\asw229\includes\lib\PdoHelper.php on line 18