bool isForbidden() Is the response forbidden? Return Value bool

bool isFresh() Returns true if the response is "fresh". Fresh responses may be served from cache without any interaction with the origin. A response is considered fresh when it includes a Cache-Control/max-age indicator or Expires header and the calculated age is less than the freshness lifetime. Return Value bool true if the response is fresh, false otherwise

bool isInformational() Is response informative? Return Value bool

bool isInvalid() Is response invalid? Return Value bool See also http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html

array getVary() Returns an array of header names given in the Vary header. Return Value array An array of Vary names

bool isCacheable() Returns true if the response is worth caching under any circumstance. Responses marked "private" with an explicit Cache-Control directive are considered uncacheable. Responses with neither a freshness lifetime (Expires, max-age) nor cache validator (Last-Modified, ETag) are considered uncacheable. Return Value bool true if the response is worth caching, false otherwise

bool hasVary() Returns true if the response includes a Vary header. Return Value bool true if the response includes a Vary header, false otherwise

bool isClientError() Is there a client error? Return Value bool

int getStatus() Gets the response status code. Return Value int The response status code

int|null getMaxAge() Returns the number of seconds after the time specified in the response's Date header when the response should no longer be considered fresh. First, it checks for a s-maxage directive, then a max-age directive, and then it falls back on an expires header. It returns null when no maximum age can be established. Return Value int|null Number of seconds