I can't find this in the manual - and the search function at php.net seems to be broken today.
I have a page that will be referenced with an argument; e.g.
I want to leave a cookie with this value; but if a cookie of the same name already exists, leave it there. (So I get the earliest referrer.)
Problem: normally the variable $src immediately gives me the value from the query string, but unfortunately if I've already set a cookie, then $src has the cookie value, and I can't get at the query string value. How can I do so?