According to this manual: http://us2.php.net/setcookie I have to set the cookie before anything else.
Here is my cookie code:
if (isset($_COOKIE['watched_ads'])){
$expir = time()+1728000; //20 days
$ad_arr = unserialize($_COOKIE['watched_ads']);
$arr_elem = count($ad_arr);
if (in_array($ad_id, $ad_arr) == FALSE){
if ($arr_elem>10){
array_shift($ad_arr);
}
$ad_arr[]=$ad_id;
setcookie('watched_ads', serialize($ad_arr), $expir, '/');
}
}
else {
$expir = time()+1728000; //20 days
$ad_arr[] = $ad_id;
setcookie('watched_ads', serialize($ad_arr), $expir, '/');
}
As you can see I am using variables in setting the cookie.
The variables comes from a mysql_query and I have to do the query first.
But then, if I do, I will get an error message:
Cannot modify header information - headers already sent by ...
The error points to the line where I set the cookie above.
What should I do?a
