title: Force pdf file download upon submit
body: <p>I have a form that submits to a php script which I would like to do the following:</p>
  
  <ol>
  <li>capture the user input via POST (done)</li>
  <li>send me an email with the user's details (done)</li>
  <li>start downloading a PDF from the same directory as the .php file (test.pdf) - HELP!</li>
  </ol>
  
  <p>EDIT: FYI, I am calling the php via jquery:</p>
  
  <pre><code>$.ajax({
      type: "POST",
      url: php_url,
      data: $('#popForm').serialize(),
              success: function(){
             window.location.href = 'downloadpdf.php?file=test.pdf';
          }
      })
  </code></pre>
  
  <p>Here is the php code that captures the user input via POST and sends it to me via email.  I just need a section that does #3, above. </p>
  
  <pre><code>&lt;?php
  
  $email_PGi = "me@mail.com";
  $email_subject = "some email subject";
  
  
  $firstname = $_POST['firstname']; 
  $lastname = $_POST['lastname']; 
  
  $email_message = "The following is a new message received via the website:\n\n";
  
  function clean_string($string) {
    $bad = array("content-type","bcc:","to:","cc:","href");
    return str_replace($bad,"",$string);
  }
  
  $email_message .= "First Name: ".clean_string($firstname)."\n";
  $email_message .= "Last Name: ".clean_string($lastname)."\n";
  
  
  // create email headers
  $headers = 'From: '.$biz_email."\r\n".
  'Reply-To: '.$biz_email."\r\n" .
  'X-Mailer: PHP/' . phpversion();
  
  @mail($email_PGi, $email_subject, $email_message, $headers);
  
  
  ?&gt;
  </code></pre>
  
  <p>downloadpdf.php</p>
  
  <pre><code>&lt;?php
  
  $file = $_GET['file'];
  header('Content-Type: Content-Type: application/pdf');
  header('Content-Disposition: attachment; filename="' . basename($file) . '"');
  header('Content-Length: ' . $file);
  readfile($filename);
  die();
  
  ?&gt;
  </code></pre>