In My current application I’ve used facebook Graph API to fetched data from facebook with the help of PHP SDK. I’ve explored so many tutorials on web but I found some links are very helpful and easy to understand Here I’m sharing those links. By surfing through these links you can get to know these below things
1 . How you can create your application in Facebook and How you can use APP ID and APP Secret?
2. How you can connect to Facebook from your Application?
3. How you can fetch data with the help of Facebook Graph API and PHP-SDK?
4. How you can Design your Facebook Application?
So here are some useful links.
To Create a New Application in Facebook.
PHP SDK refrence
FB Tool for Graph API Explorer
Hope it helps.