PHP $_SESSION Error - Headers already sent [duplicate] OR White In PHP Server
You can't start a session after you've sent output to the browser.. Put the <html> tag above t he <head> tag. <? php require_once ( 'config/config.php' ); require_once ( 'config/db.php' ); require_once ( 'classes/Login.php' ); $login = new Login (); ?> <html> <head>