checkbox DB 저장방법좀 알려주세요.

<ul>
               <li><label><img src="/images/icon_service_parking.png"><br>

               <input type="checkbox" name="service[]" value="parking"> 체크1</label></li>
               <li><label><img src="/images/icon_service_terrace.png"><br>

               <input type="checkbox" name="service[]" value="terrace"> 체크2</label></li>
               <li><label><img src="/images/icon_service_takeout.png"><br>

               <input type="checkbox" name="service[]" value="takeout"> 체크3</label></li>
               <li><label><img src="/images/icon_service_baguette.png"><br>

              <input type="checkbox" name="service[]" value="baguette"> 체크</label></li>
 </ul>​ 

이렇게 해서 입력받을건데요

저장할때 저게 체크되어지면 여분필드 이용해서 저걸 저장하는 방법좀 알려주세요.