Forum OpenACS Q&A: Response to How to get the form data of a multi-value checkbox?

Try an array. In OpenACS4, you can use this on the form:

1002 <input type=checkbox name=item.1002 value=1> 
1005 <input type=checkbox name=item.1005 value=1>

Then on the form processing page, using ad_page_contract:

ad_page_contract { } {

  item:array

}