Vps not run facebook-php-sdk | DigitalOcean

I use ubuntu 12.04 and make https://www.digitalocean.com/community/articles/how-to-install-linux-apache-mysql-php-lamp-stack-on-ubuntu But i download facebook-php-sdk-master and run on url then nothing display. Please help me

29 Jan 2014 ... Are you trying to run the example.php file provided by the facebook-php-sdk? If you followed the linked LAMP tutorial, your server's root ...

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