Store value in cookie

Question

I'm doing a database query in a page, and afterwards I want to store an id - I thought I could do it in $_COOKIE?

But it doesn't seem to work to just create a parameter and set a value to it, like:

$_COOKIE['member_id'] = $wpdb->insert_id;

How can I simply add a key and value to the cookie array?

Answer 1

Use setcookie() like shown below:

setcookie(
  $name, 
  $value, 
  time() + 3600, 
  COOKIEPATH, 
  COOKIE_DOMAIN
);

Note: $wpdb->insert_id AFAIK will always return false or 1, so I'm not sure if that will be of value for your. I might be wrong about that see @s_ha_dum's comment.