title: Links not working from subdirectories
body: <p>I want to make multiple pages on my website, but to keep everything clean I want to make different directoriess with the different pages. However, I use php to make a different file with my header that is included in all my pages, so I only have to change the code of my header once and it will be the same on all pages.</p>
  
  <p>The problem is that the links I use in my menu items (like home, contact, about, etc.) will not work anymore when you're on a page inside a directory (I'll make an example below).</p>
  
  <p>So my question:
  Is there a home folder on a website (like ~/ on unix) or is there another way to make it work?</p>
  
  <p>Example of my directory structure:</p>
  
  <pre><code>htdocs
      index.php
      header.php
      menus
          contact.php
          about.php
  </code></pre>
  
  <p>(a link to index.php won't work anymore if you're on the contact.php page)</p>