Expert: Draicone - 7/25/2006

Question
ok that was a nice idea but there is some problem.

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

i used like this code example
setcookie("user", "Alex Porter", time()+3600);

and i retrive this by using:
$username = $_COOKIE["user"];
then the warning show up. then i cant store cookies.  
could you tell me whats wrong and how could i fix this problem. thanks!

Answer
The problem you are having is this: when a webpage is sent from a server to a client, first the headers are sent over, which define some basic data about the page, and then the html of the page is sent over. The operation you are attempting requires adding some data to the header, but obviously this cannot be done once the headers have finished and the html is being sent across. Try doing this before you start echoing things onto the page and it should work. However, it is easiest to use $_SESSION :) In this case, just set all the variables up (using cookies or session) before you echo anything and echo based on this.