frasermarlow on "Warning: Cannot modify header information error"

Hi All, still rebuilding after an attack. We are making progress, but our latest issue to restore it is that we get these errors below (I left out the site info, but the link will take you the actual site. Because of the attack I removed some info in the url error examples.)

Waing: Cannot modify header information - headers already sent by (output started at /home/SERVERREDACTED/public_html/SITEredetacted/wp-content/themes/twentytwelve-child/functions.php:27) in /home/SERVERREDACTED/public_html/SITEredetacted/wp-includes/pluggable.php on line 1167

Heres a link

I replaced the pluggable.php file, and the childtheme should be just fine. It worked before, I dont know if something got corrupted in zipping and extracting but its been very frustrating.

Also the dashboard is not showing up after logging in we see these errors.

Waing: Cannot modify header information - headers already sent by (output started at /home/Server REDACTED/public_html/WEBSITE REDACTED/wp-content/themes/twentytwelve-child/functions.php:27) in/home/Server REDACTED/public_html/WEBSITE REDACTED/wp-login.php on line 390

Waing: Cannot modify header information - headers already sent by (output started at /home/Server REDACTED/public_html/WEBSITE REDACTED/wp-content/themes/twentytwelve-child/functions.php:27) in/home/Server REDACTED/public_html/WEBSITE REDACTED/wp-login.php on line 403

Other areas keep bringing up twentytwelve-child/functions.php:27
But the functions.php has not changed from when it worked before.

Any help would be so much appreciated.

A