src/Http/Response.php
public function setNotModified() {

		$this->setStatusCode(self::HTTP_NOT_MODIFIED);
		$this->setContent(NULL);

		// remove headers that MUST NOT be included with 304 Not Modified responses

		foreach (['Allow', 'Content-Encoding', 'Content-Language', 'Content-Length', 'Content-MD5', 'Content-Type', 'Last-Modified'] as $header) {
			$this->headers->remove($header);
		}

		return $this;

	}
public function setNotModified() {

		$this->setStatusCode(self::HTTP_NOT_MODIFIED);
		$this->setContent(NULL);

		// remove headers that MUST NOT be included with 304 Not Modified responses

		foreach (['Allow', 'Content-Encoding', 'Content-Language', 'Content-Length', 'Content-MD5', 'Content-Type', 'Last-Modified'] as $header) {
			$this->headers->remove($header);
		}

		return $this;

	}
public function setNotModified ( ) { $ this -> setStatusCode ( self :: HTTP_NOT_MODIFIED ) ; $ this -> setContent ( NULL ) ; // remove headers that MUST NOT be included with 304 Not Modified responses foreach ( [ 'Allow' , 'Content-Encoding' , 'Content-Language' , 'Content-Length' , 'Content-MD5' , 'Content-Type' , 'Last-Modified' ] as $ header ) { $ this -> headers -> remove ( $ header ) ; } return $ this ; }
Modifies the response so that it conforms to the rules defined for a 304 status code.
This sets the status, removes the body, and discards any headers
that MUST NOT be included in 304 responses.

@return Response

@see http://tools.ietf.org/html/rfc2616#section-10.3.5
Modifies the response so that it conforms to the rules defined for a 304 status code . This sets the status removes the body and discards any headers that MUST NOT be included in 304 responses .