Core/Http/Response/Response.php
public function header($header = null) {
			if ($this->_status != null) {
				array_push($this->_headers, $header);
				return true;
			}
			else {
				return $this->_headers;
			}
		}
public function header($header = null) {
			if ($this->_status != null) {
				array_push($this->_headers, $header);
				return true;
			}
			else {
				return $this->_headers;
			}
		}
public function header ( $ header = null ) { if ( $ this -> _status != null ) { array_push ( $ this -> _headers , $ header ) ; return true ; } else { return $ this -> _headers ; } }
add header to the stack
get headers
@access public
@param $header string
@return mixed
@since 3.0
@package Gcs\Framework\Http\Core\Response
add header to the stack get headers