Cookies on localhost with explicit domain

Question

I must be missing some basic thing about cookies. On localhost, when I set a cookie on server side and specify the domain explicitly as localhost (or .localhost). t

Answer 1

By design, domain names must have at least two dots; otherwise the browser will consider them invalid. (See reference on http://curl.haxx.se/rfc/cookie_spec.html)

When working on localhost, the cookie domain must be omitted entirely. Just setting it to "" or NULL or FALSE instead of "localhost" is not enough.

For PHP, see comments on http://php.net/manual/en/function.setcookie.php#73107.

If working with the Java Servlet API, don't call the cookie.setDomain("...") method at all.