title: .htaccess (500 Internal Server Error) - removing file extension in url
body: <p>Here is my source code.</p>
  
  <pre><code>RewriteEngine On
  RewriteCond %{REQUEST_FILENAME} !-f
  RewriteRule ^([^\.]+)$ $1.php [NC]
  </code></pre>
  
  <blockquote>
    <p><strong>Internal Server Error</strong></p>
    
    <p>The server encountered an internal error or misconfiguration and was unable to complete your request.
    Please contact the server administrator at admin@example.com to inform them of the time 
    this error occurred, and the actions you performed just before this error.
    More information about this error may be available in the server error log.</p>
  </blockquote>