php cookie doesn't update

Question

I need to update a cookie. I do that in a php file called via ajax. This is is the code:

setcookie(\'items[\'.$_POST[\'id\'].\']\');

The cookie

Answer 1

From php.net/manual/function.setcookie.php:

Cookies will not become visible until the next loading of a page that the cookie should be visible for. To test if a cookie was successfully set, check for the cookie on a next loading page before the cookie expires. Expire time is set via the expire parameter. A nice way to debug the existence of cookies is by simply calling print_r($_COOKIE);.

So the cookie will be accessible via $_COOKIE at the request of the PHP script.