Generates a cookie and passes it along with the rest of the
setcookie() must be called before
any output is generated.
name is specified, the cookie
with that name is deleted from the client. The
value argument specifies a value for the
cookie to take,
expiration is a Unix
timestamp value defining a time the cookie should expire, and the
parameters define a domain for the cookie to be associated with. If
true, the cookie will be transmitted only
over a secure HTTP connection.