I am trying to set up nginx server to run a php app in debian. I followed this tutorial among others. Most seems the same. My recent configuration is based on the link above. When I try to run this php script,

<?php
    phpinfo();  
?>

I get the same output on the browser instead of php info result. Kindly someone help me figure out where I went wrong.

Note: My error logs are clean,contains details on nginx server start only.

Thank you.