title: PHP prints /f from behind the curtains
body: <p>I have an old web site which generates PDF reports and sends via email. It uses Zend_Mail, pChart and Zend_Pdf.
  I've already noticed that PHP prints out /f somewhere in there, but it is mostly not visible since a new browser tab would only show if the PDF report fails somewhere on the way. Then I would sit with only /f as the output. This made be think it only appeared when there was an error.</p>
  
  <p>This becomes a "problem" when I run this whole generating-mailing procedure using the CLI. It happens when I do something like this:</p>
  
  <pre><code>$instance = new $aClassName();
  </code></pre>
  
  <p>It also only happens the first time I do it. Any ideas?</p>