title: Redirect root index.php to subdirectory
body: <p>I've installed wordpress into a folder and I would like to redirect root index.php to wordpress the folder without using</p>
  
  <blockquote>
    <p>header('Location: ./folder/');</p>
  </blockquote>
  
  <p>or meta redirect.
  I would like to redirect only index file with something like <strong>.htaccess</strong> rules. How can I do this?</p>
  
  <p><strong>EDIT</strong></p>
  
  <p>I've expressed myself badly, I need a sort of redirect but not a true redirect because using redirect causes some problems with Google.
  So I'd like to give <em>./folder/</em> instead of <em>index.php</em> or <em>./</em>.   </p>