Go to Facebook Developer’s page using this address https://developers.facebook.com/apps/
1. Click on add a new app to create a new app.
2. Fillup the form.
3. Click Create App ID to proceed.
If you are not registered as “Developer” yet, you need to click blue button “Register.” If you are logged, then proceed to the step #4.
4. Go to app dashboard Settings page
5. Put all required information of your app like Domain, Sub-domain, etc.
6. Click on Add Platform.
7. Select Website.
8. Put your WebSite URL information.
9. Go to App Review
10. Make the app online.
11. Go to Add Product’s
12. Click Facebook login setup
13. Click on setting’s page
14. Put the domain of your site as Valid OAuth redirect URL.
15. After configuring the facebook app, put App ID and App Secret
16. Click “Authorize” to complete the authorization process.