Yesterday I almost became tensed. Some tutorials on the net are really lame! I trusted a site and applied that tutorial directly on my blog, and the result became sh*t. I highly recommend you to try tutorials on a demo blog rather than on your primary site or blog.

Yesterday I came across this unique WordPress error titled “Cannot modify header information – headers already sent by …” [Without Quotes]

Though, this tutorial is 99.9% perfect, I recommend you to backup all your theme files before implementing this tutorial. Happy Blogging!

I’ll tell you what mistake I did and how to resolve that..

Description :

You get a warning message on your browser that says:

Warning: Cannot modify header information – headers already sent by (output started at

Example :

Reason :

The reason is simply simple. It is usually because there are spaces, new lines, or other garbage before an opening < ?php tag or after a closing ?> tag, most probably in wp-config.php. It may also occur in other files too, so please check the error message. Many editors are adding additional blanks (spaces) and empty lines at the end of a file when you edit it.

Solution :

The best solution I would say is to replace the corrupted file with the file you have in your backup. You can also try the following alternative steps!

#1 - Download the file mentioned in the error message.

#2 - Now open that file using a really good Text Editor. It should be a plain text editor. I highly recommend Notepad++ or TextWrangler.

P.S. Don’t risk. Avoid Notepad, WordPad and even MS Word.

#3 – Now check that the very first characters are < ?php and the very last characters are ?>

Most Important!

You should save your file either as ANSI/ISO-8859 or as Unicode without BOM. Don’t ever save in normal format.

Have you ever faced this problem? Do you any other solution for solving this?