Warning: mysqli::__construct(): (HY000/1698): Access denied for user 'root'@'localhost' in /var/www/Instituto.com/html/TareaOnline2/index.php on line 6

Warning: mysqli::set_charset(): Couldn't fetch mysqli in /var/www/Instituto.com/html/TareaOnline2/index.php on line 7

Warning: mysqli_query(): Couldn't fetch mysqli in /var/www/Instituto.com/html/TareaOnline2/index.php on line 12

Warning: mysqli_error(): Couldn't fetch mysqli in /var/www/Instituto.com/html/TareaOnline2/index.php on line 15
Error al introducir el sql:
Warning: mysqli_query(): Couldn't fetch mysqli in /var/www/Instituto.com/html/TareaOnline2/index.php on line 17

Warning: mysqli_close(): Couldn't fetch mysqli in /var/www/Instituto.com/html/TareaOnline2/index.php on line 18

Warning: Invalid argument supplied for foreach() in /var/www/Instituto.com/html/TareaOnline2/index.php on line 62