一个奇怪的有关问题，查入数据库的时候，少一值

        while(list($key ,$value)=each($rs)){ //$rs为数据库里的电视剧分集数组
            echo $value['s_num'];
              foreach ( $info as $keys => $v){  //$info为分集内容数组。
                  echo $keys."
";             
                  if($value['s_num'] == $keys){      //$value['s_num']为集数
                      $option['table'] = $this->module->getTableName('ms_series_info');
                      $option['data']['s_description'] = $v;
                      $option['where'][] = 's_num ='.$keys;
                      $option['where'][] = 's_id = '.$id;
                      $s = $this->module->update($option);
                      if($s){
                          break;
                      } 
                  }
                  $option='';
            }
        }