title: Apache lists directory files instead of index.php
body: <p>My Apache web server suddenly stopped serving index.php files automatically. It shows direcotry listing instead. I've tried helps but no luck.</p>
  
  <p>My htttpd.conf file includes</p>
  
  <pre><code>&lt;IfModule module_php5&gt;
      AddType application/x-httpd-php .php
  &lt;/IfMOdule&gt;
  </code></pre>
  
  <p>and</p>
  
  <pre><code>DirectoryIndex index.php index.html
  </code></pre>
  
  <p>What could be wrong if all above are OK?</p>