[SOLVED][Drupal Errors] Warning: "Headers already sent"

Here is the solution for the error message.

• If you are getting a "Headers already sent error" there are 3 likely causes.
• If it is not the first error message then it is likely to be the after effect of the messages in front of it and you should focus on fixing them
• Fixing them will likely solve the issue automatically
• Some text editors will place a UTF-8 byte order mark at the top of a text file. If that is the case the error message will display that "output started at line 1 of some file". Configure the text editor to save the file without the mark.
• If you receive it as the first error message then it means that the error has occurred at the end of a file. Check out the error message (output started at) to see which file caused this. The error is usually related to extra spaces after a closing tag
• Drupal files should not have PHP closing tags and deleting them will solve the error.
• The error could also be caused by blank spaces with extra spaces .inc files
• Check all .inc and .php files to make sure that there are no closing tags
• If the message shows that the problem lies with a module try disabling that module to see if it goes away.
• Enable the output_buffering variable in php.ini file and see if it fixes the issue.

Hope that helps.