title: PHP file not saving to given file or directory
body: <p>I have gotten my code to work up until now. I have a set of code that when it gets called it generates a pdf file and is supposed to store it in a given file. I am using the Output('filename.pdf', 'F') and I don't see any files being stored. I have confirmed the file does download effectively using the 'I' and the 'D'. When I try the F I don't get any errors and it appears all has worked but when i check the folder it's empty. 
  Could this be a permissions thing? Another question is if I give a path weather it is a directory or a path for a file is it supposed to work? Assuming this gets accessed by people in under the same network..
  Below is my code:</p>
  
  <pre><code>define("TEMP_PDF_DIR", "C:\\Temp\\Waiver\\");
  $pdf is created form class....
  $pdfFile = TEMP_PDF_DIR . 'Waiver_'. $name . '.pdf';
  $pdf addPage()..
  ...
  $pdf-&gt;Output( $pdfFile, 'F');
  </code></pre>
  
  <p>again all works when I download it instantly or open it to then download it.</p>