I was busy with Facebook API so here is a demo of Facebook Login and Inviting Friends.
It is sharing coupon application which will post to your Facebook wall and asks you to invite friends to use this Facebook application –
When you click on ‘share coupon’ button, It will redirect you to Facebook Login and asks you to authorize app. When you have granted the permission then It will post coupon to your wall and asks you to invite friends.
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Stay tuned for more updates.