Magento Debug HEADERS ALREADY SENT error

Question

I am receiving the following error in my system.log file:

 2011-01-12T14:16:52+00:00 DEBUG (7): HEADERS ALREADY SENT: 
 [0] C:\\xampp\\htdocs\\www.mysite.com         


        

Answer 1

The most common place you run into this in Magento is when you output content directly from the controller.

Instead of doing

echo $string; 

within a controller, do this:

$this->getResponse()->setBody($string);