Cant load wp-login.php WordPress Troubleshooting

I am a newb at this. After building my first blog, i
discovered a thing called validation. Im trying to weed out my code errors, while not paying attention to what the site looks like. I have 5 duplicate errors to do with widgets in the sidebars. (categories)
I Tried a “fix” that i found on here, and now i cannot login to wordpress.(wp-login.php wont load, gives error) I get the following:

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Warning: Cannot modify header information – headers already sent by (output started at /home/waramp22/public_html/wp-content/themes/rockin-chrome-1/functions.php:7) in /home/waramp22/public_html/wp-login.php on line 12

Warning: Cannot modify header information – headers already sent by (output started at /home/waramp22/public_html/wp-content/themes/rockin-chrome-1/functions.php:7) in /home/waramp22/public_html/wp-login.php on line 24

Warning: Cannot modify header information – headers already sent by (output started at /home/waramp22/public_html/wp-content/themes/rockin-chrome-1/functions.php:7) in /home/waramp22/public_html/wp-includes/pluggable.php on line 390
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Last time this happend was with functions.php, i just reinstalled that file. I downloaded the theme i am using, opened functions.php and it contains the same code as the functions.php in my file manager. Which is:

——————
<?php
if ( function_exists(‘register_sidebars’) )
register_sidebars(2);
?>
——————-

My online pluggable.php, and wp-login.php are identical in code to new copies in the zip file.

Would the error likely be somewhere else?

Thank you very much for any help.