gistfile1.php

<?php

  /**
   * Returns PDF file whith appropriate headers
   *
   * @param string $content The file content
   *
   * @return sfView::NONE
   */
  public function renderPDF($content)
  {
    $r = $this->getResponse();
    $r->clearHttpHeaders(); 
    $r->setContentType('application/pdf');            
    $r->setHttpHeader('Content-Disposition', 'inline; filename="print.pdf"');
    
    return $this->renderText($content);
  }