note 21439 added to function.setcookie

Your link to the Cookie specification is very out-of-date. There are two newer specification which are adopted by the IETF: http://www.netscape.com/newsref/std/cookie_spec.html "Persistent Client State -- HTTP Cookies" http://www.ietf.org/rfc/rfc2109.txt "HTTP State Management Mechanism" http://www.ietf.org/rfc/rfc2965.txt "HTTP State Management Mechanism" RFC 2965 specifies the Set-Cookie2 syntax, RFC 2109 specifies the Set-Cookie syntax, which is commonly used (and I recommend is used at the moment). These RFC have a better security section, and deal with things like Spoofing (see exerpt bellow): Proper application design can avoid spoofing attacks from related domains. Consider: 1. User agent makes request to victim.cracker.edu, gets back cookie session_id="1234" and sets the default domain victim.cracker.edu. 2. User agent makes request to spoof.cracker.edu, gets back cookie session-id="1111", with Domain=".cracker.edu". 3. User agent makes request to victim.cracker.edu again, and passes Cookie: $Version="1"; session_id="1234", $Version="1"; session_id="1111"; $Domain=".cracker.edu" The server at victim.cracker.edu should detect that the second cookie was not one it originated by noticing that the Domain attribute is not for itself and ignore it. -- http://www.php.net/manual/en/function.setcookie.php http://master.php.net/manage/user-notes.php?action=edit+21439 http://master.php.net/manage/user-notes.php?action=delete+21439 http://master.php.net/manage/user-notes.php?action=reject+21439