Al introducir la URL sale esto:
Warning: Cannot add header information - headers already sent by (output started at /home/virtual/site20/fst/var/www/html/index.php:13) in /home/virtual/site20/fst/var/www/html/index.php on line 1
Warning: Cannot add header information - headers already sent by (output started at /home/virtual/site20/fst/var/www/html/index.php:13) in /home/virtual/site20/fst/var/www/html/index.php on line 1