Is it important???

[eluser]anggie[/eluser]
I just wanna know answer to this simple question...

Is it important to write :

Code:

<?php  if ( ! defined('BASEPATH')) exit('No direct script access allowed');

I know what is it for, but when i add it to my controller, it show me a PHP error message :

Code:

A PHP Error was encountered

Severity: Warning

Message: Cannot modify header information - headers already sent by (output started at E:\Dokumenku\xampp\htdocs\CodeIgniter\system\application\controllers\admin.php:3)

Filename: libraries/Session.php

Line Number: 315

Sorry...I am newbie...could you suggest any help??
Thanks...

[eluser]wiredesignz[/eluser]
Hi anggie, Welcome to CI forums.

The error is due to having `whitespace` outside the <?php ?> tags in your Controller file.

Anything outside the tags is considered as HTML and is output, so you get a `headers already sent` error.

It's common practice now, not to use the closing tag ?> in pure PHP files.

Hope this helps.

[eluser]anggie[/eluser]
Thanks wiredesignz!