Facebook Login in Google App Engine Application (php)

[Tiago Gouvêa via StackOverflow]

1) Download that branch of SDS: https://github.com/camfitz/facebook-php-sdk;

2) Create an Application on facebook: https://developers.facebook.com/docs/reference/php/ > Apps > Create New Application;

3) Edit the example.php downloaded, and change the 'appId' and 'secret' to the data in you facebook application Dashboard page; ));

4) Read the "Authentication and authorization" in https://developers.facebook.com/docs/php/gettingstarted/ and adjust the example code if needed.

5) Run it and VOILA!

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