Header Location Problem... help!

[robertoduran]

<?
require('dbconection.php');
$id_cat = $_POST['id_cat'];

//CHECK DE COOKIES:
function  check_cookie(){
	if (isset($_COOKIE["donacuario"])){   //REVISA SI EXISTE LA COOKIE
			return $_COOKIE["donacuario"];
	}
	else  //CREAR LA COOKIE
	{
		session_start();
		setcookie("donacuario",session_id(),time() + 3600);
		return session_id();
	}
}

$ses = check_cookie();

if ( $ses != "" ){
	$fecha = date("F j, Y, g:i a");
	$ingresa_prod = mysql_query("INSERT INTO don_carrito_temp VALUES('$ses','$id_producto','$cantidad','$fecha')");
	//echo "$ses";
	header ("LOCATION: index.php?id_cat=$id_cat");
}

?>

I have this error:

Warning: Cannot add header information - headers already sent by (output started at add_carrito.php:23) in add_carrito.php on line 24

Any ideas... ?

[robertoduran]

NEVERMIND... haha aleady fixed..

[bradgrafelman]

Don't forget to mark this thread resolved. To help people that are using the search feature, you might also consider posting how you fixed it.