How to use Facebook API to send invitations to friends to ask for a specific fanpage like.
And the other question.
How then show a list of users who have sent an invitation with an indication of how many people liked the profile. In this way, users will take a ranking of who sent the most invitations
How to use Facebook API to send invitations to friends to ask for a specific fanpage like.
You may use the Notification API, with a message and the link to page. Or, using the Feed dialog by posting on wall to each of the app user. (I prefer the first one)
How then show a list of users who have sent an invitation with an indication of how many people liked the profile. In this way, users will take a ranking of who sent the most invitations
The invitations will be sent to all the friends I guess. If not, then you have to keep the record of the invitations sent, manually.