Using array names was impractical and problematic, so I implemented a splitting routine.
For example, the domain and path are hard coded and no return values are checked for validity.On high traffic sites, this can substantially increase the size of subsequent HTTP requests from clients (including requests for static content on the same domain).More importantly though, the cookie specification says that browsers need only accept 20 cookies per domain.を設定すると、HTTP を通してのみクッキーにアクセスできるようになります。 つまり、Java Script のようなスクリプト言語からはアクセスできなくなるということです。 この設定を使用すると、XSS 攻撃によって ID を盗まれる危険性を減らせる (が、すべてのブラウザがこの設定をサポートしているというわけではありません) と言われていますが、これはしばしば議論の対象となります。 PHP 5.2.0 で追加されました。 Want to remove a cookie?Many people do it the complicated way:setcookie('name', 'content', time()-3600); But why do you make it so complicated and risk it not working, when the client's time is wrong?Requests to subdom.will have both cookies, while browser request to or sends the cookie with the "value1hostonly" value.
IE7 can have trouble with settings cookies that are embedded in an iframe.
something that wasn't made clear to me here and totally confused me for a while was that domain names must contain at least two dots (.), hence 'localhost' is invalid and the browser will refuse to set the cookie!
instead for localhost you should use make your code work on both localhost and a proper domain, you can do this: If you're having problem with IE not accepting session cookies this could help: It seems the IE (6, 7, 8 and 9) do not accept the part 'Expire=0' when setting a session cookie. The default behavior when the 'Expire' is not set is to set the cookie as a session one.
Instead use $_SERVER['HTTP_COOKIE'] as it mirrors the actual HTTP Request header.
If you are having issues with IE7 and setcookie(), be sure to verify that the cookie is set via http for http sites, and https for https site.
The problem lies with a W3C standard called Platform for Privacy Preferences or P3P for short.