Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at /www/fedu/index.php:4) in /www/fedu/index.php on line 5

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /www/fedu/index.php:4) in /www/fedu/index.php on line 5
ERROR: could not find driver
Fatal error: Call to a member function prepare() on a non-object in /www/fedu/conf.inc.php on line 87