Warning: session_start(): Session cannot be started after headers have already been sent in /var/www/html/archive/messano/signup.php on line 2

Fatal error: Uncaught PDOException: could not find driver in /var/www/html/archive/messano/signup.php:4 Stack trace: #0 /var/www/html/archive/messano/signup.php(4): PDO->__construct('mysql:host=loca...', 'root', Object(SensitiveParameterValue)) #1 /var/www/html/archive/messano/index.php(36): include('/var/www/html/a...') #2 {main} thrown in /var/www/html/archive/messano/signup.php on line 4