Error- Cannot modify header information - headers already sent

[bleustreak12]

I am getting this error when I use this

 header("Location: /");

to redirect to home page.I believe  there is a javascript alert which come before this is called, that gives the below error, I cannot remove the alert so is there nay other way I can go about redirecting without giving me the below error ?

 

 

 

A PHP Error was encountered

Severity: Warning

Message: Cannot modify header information - headers already sent by (output started at /home/dsdsd/application/core/MY_Controller.php:dsdsds)

[scootstah]

Are you using CodeIgniter?

 

If so, you're doing something very wrong...you shouldn't have any output in that file.

[Maq]

Have you read this sticky?

http://www.phpfreaks.com/forums/index.php?topic=37442.0