title: PHP: I get a completely blank page, I don't know how to debug this in PHP
body: <p>I'm having some issues to debug this in php. When I include this line:</p>
  
  <pre><code>require_once("http://" . $_SERVER["HTTP_HOST"] . "/dompdf/dompdf_config.inc.php");
  </code></pre>
  
  <p>what I get is just a blank page, I don't get any html code as response. Maybe the error messages are hidden ? </p>