Problem serving PDF file

[laceja]

I've been struggling with a problem for several days now. I'm trying to serve a PDF file and, when I try to "Open with Adobe Reader...", I get an error that says:

Could not open "filename.pdf" because it is either not a supported file type or because the file has been damaged (for example, it was sent as an email attachment and wasn't correctly decoded).

I double click on the original file, in my file system, it opens without any problems in Adobe Reader.

Here's the relavent PHP code:

session_cache_limiter('must-revalidate');
header("Pragma: public");
header("Expires: " . gmdate("D, d M Y H:i:s", time()) . " GMT");
header("Cache-Control: private");
header("Content-Description: File Transfer");
header("Content-Type: application/pdf");
header("Content-Disposition: attachment; filename=\"$asfname\"");
header("Content-Transfer-Encoding: binary");
header("Content-Length: " . $fsize);

$file = fopen($file_path,"rb");
if ($file) {
  while(!feof($file)) {
    print(fread($file, 1024*8));
    flush();
    if (connection_status()!=0) {
      fclose($file);
      die();
    }
  }
  fclose($file);
}

I'm running PHP 5.3.1 on Apache on a WindowsXP machine. I have verified that "extension=php_pdflib.dll" is in my php.ini and is not commented out. My browser is Firefox 3.6.10. I doubt the problem is with the browser because, I have no problem downloading and opening PDF files from external sites. I have also verified that all variables are correct and values are correct, using xdebug.

This is driving me crazy.

Help!

[bradgrafelman]

What happens if you replace this:

$file = fopen($file_path,"rb"); 
if ($file) { 
  while(!feof($file)) { 
    print(fread($file, 1024*8)); 
    flush(); 
    if (connection_status()!=0) { 
      fclose($file); 
      die(); 
    } 
  } 
  fclose($file); 
} 

with this:

readfile($file_path);

?

[laceja]

Well, I'm not at all sure why, but that works.

[laceja]

Resolved:

Use readfile($file_path);