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

bool isEmpty() Is the response empty? Return Value bool

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

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

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

int|null getTtl() Returns the response's time-to-live in seconds. It returns null when no freshness information is present in the response. When the responses TTL is <= 0, the response may not be served from cache without first revalidating with the origin. Return Value int|null The TTL in seconds

int getStatusCode() Retrieves the status code for the current web response. Return Value int Status code