original_string: public function flush($delay = 0) {
      $result = $this->memcache->flush();
      $this->result_code = $result ? self::RES_SUCCESS : self::RES_NOTSTORED;
      return $result;
    }
code: public function flush($delay = 0) {
      $result = $this->memcache->flush();
      $this->result_code = $result ? self::RES_SUCCESS : self::RES_NOTSTORED;
      return $result;
    }
code_tokens: public function flush ( $ delay = 0 ) { $ result = $ this -> memcache -> flush ( ) ; $ this -> result_code = $ result ? self :: RES_SUCCESS : self :: RES_NOTSTORED ; return $ result ; }
docstring: Invalidates all existing cache items immediately.
  
  @param int $delay This parameter is ignored.
  
  @return bool true on success, or false on failure.
docstring_tokens: Invalidates all existing cache items immediately .