wordpress Warning: Cannot modify header information - headers already sent by
- Open the file causing the warning in a code editor.
- Search for any characters (such as spaces, new lines, or symbols) outside of the PHP tags at the beginning and end of the file.
- If found, remove them and save the file.
- If the issue persists, check for any characters before the opening <?php tag or after the closing ?> tag.
- Ensure there are no echo or print statements before the headers are sent.
- Save the file and test to see if the warning has been resolved.