$this->db->select('*');
           $this->db->from('rankcertificate');
              $this->db->where('cin', $user);
              $this->db->where('year', '14/15' or 'year', '18/19' or 'year', '19/20' or 'year', '20/21' or 'year', '21/22');
           $query = $this->db->get();