note 44 deleted from function.setcookie by rasmus

SetCookie()'s behavior is dependant on where it is called within the web document tree. For example, setting a cookie from a php script in a directory makes that cookie available only to other scripts in that directory and its subdirectories. However, setting a cookie of the same name from a script in the directory's parent directory will override all cookies of that name in the parent directory's subdirectories. To better control the behavior of cookies, you might try sending a raw Set-Cookie: header with the header() function (see Netscape's cookie spec for information on the Set-Cookie: header).