post form to facebook event wall

I have a facebook event, and i want to send the members a form that i created and hosted on my website, asking them what days they are available to meet. I want is so that when they hit submit it will post the information from the form to the event wall.

I have never done anything with facebook, and the examples i found were to post on your own wall not an event wall.

as of now the开发者_StackOverflow社区 form is handled by a php script which just emails me the result.

Reference Facebook for Developers

This is more complex than it seems.

1) Register your website that houses the form as a facebook app.
2) Add php code or javascript code to request permission to post on behalf of your users.
3) On submit, send a message to facebook to post on the event wall.

The message would follow the format found here.
Details of Event API

The url of the event wall would be https://graph.facebook.com/{event}/feed.