title: PHP code is not executed in Apache, rather the code itself is displayed
body: <p>I am new to PHP. Why Apache only displays file content but doesn't execute <code>index.php</code>?</p>
  
  <p>I installed prosper202 on apache2 subdomain on ubuntu 14 with PHP 5.5.9-1ubuntu4.20 (cli) (built: Oct 3 2016 13:00:37) and php-fpm, but it only displays the content of <code>index.php</code>, it doesn't lead me to setup process.</p>
  
  <p>What's wrong and how to run <code>index.php</code>?</p>