Face book multi friend selector

I wan to show the facebook popup to the use开发者_如何学Gor from where user select the friends and when he click select then the selected user ids return. I want to do this Flex but if you can tell me how to do it in php it will also very helpful for me.

Here's how you do it in JavaScript: https://developers.facebook.com/docs/reference/dialogs/requests/

More to the bottom of the page there's more info about retrieving the user_ids.