In most cases, there is no need to directly instantiate a Zend_Http_CookieJar object. If you want to attach a new cookie jar to your Zend_Http_Client object, just call the Zend_Http_Client->setCookieJar() method, and a new, empty cookie jar will be attached to your client. You could later get this cookie jar using Zend_Http_Client->getCookieJar().

If you still wish to manually instantiate a CookieJar object, you can do so by calling "new Zend_Http_CookieJar()" directly - the constructor method does not take any parameters. Another way to instantiate a CookieJar object is to use the static Zend_Http_CookieJar::fromResponse() method. This method takes two parameters: a Zend_Http_Response object, and a reference URI, as either a string or a Zend_Uri_Http object. This method will return a new Zend_Http_CookieJar object, already containing the cookies set by the passed HTTP response. The reference URI will be used to set the cookie's domain and path, if they are not defined in the Set-Cookie headers.