Error message

• Warning: Cannot modify header information - headers already sent by (output started at /home/content/59/11331159/html/index.php:3) in drupal_send_headers() (line 1236 of /home/content/59/11331159/html/includes/bootstrap.inc).
• Warning: Cannot modify header information - headers already sent by (output started at /home/content/59/11331159/html/index.php:3) in drupal_send_headers() (line 1236 of /home/content/59/11331159/html/includes/bootstrap.inc).
• Warning: Cannot modify header information - headers already sent by (output started at /home/content/59/11331159/html/index.php:3) in drupal_send_headers() (line 1236 of /home/content/59/11331159/html/includes/bootstrap.inc).
• Warning: Cannot modify header information - headers already sent by (output started at /home/content/59/11331159/html/index.php:3) in drupal_send_headers() (line 1236 of /home/content/59/11331159/html/includes/bootstrap.inc).