I have a script that allows users to 'save as' a pdf, this is the script -

<?php

header("Content-Type: application/octet-stream");

$file = $_GET["file"] .".pdf"; header("Content-Disposition: attachment; filename=" . urlencode($file));
header("Content-Type: application/force-download"); header("Content-Type: application/octet-stream"); header("Content-Type: application/download"); header("Content-Description: File Transfer");
header("Content-Length: " . filesize($file)); flush(); // this doesn't really matter. $fp = fopen($file, "r"); while (!feof($fp)) { echo fread($fp, 65536); flush(); // this is essential for large downloads } fclose($fp); ?>

An error log is being created and gets to be more than a gig in a few days the errors I receive are-

[10-May-2010 12:38:50] PHP Warning: filesize() [function.filesize]: stat failed for BYJ-Timetable.pdf in /home/byj/public_html/pdf_server.php on line 10

[10-May-2010 12:38:50] PHP Warning: Cannot modify header information - headers already sent by (output started at /home/byj/public_html/pdf_server.php:10) in /home/byj/public_html/pdf_server.php on line 10

[10-May-2010 12:38:50] PHP Warning: fopen(BYJ-Timetable.pdf) [function.fopen]: failed to open stream: No such file or directory in /home/byj/public_html/pdf_server.php on line 12

[10-May-2010 12:38:50] PHP Warning: feof(): supplied argument is not a valid stream resource in /home/byj/public_html/pdf_server.php on line 13

[10-May-2010 12:38:50] PHP Warning: fread(): supplied argument is not a valid stream resource in /home/byj/public_html/pdf_server.php on line 15

[10-May-2010 12:38:50] PHP Warning: feof(): supplied argument is not a valid stream resource in /home/byj/public_html/pdf_server.php on line 13

[10-May-2010 12:38:50] PHP Warning: fread(): supplied argument is not a valid stream resource in /home/byj/public_html/pdf_server.php on line 15

The line 13 and 15 just continue on and on... I'm a bit of a newbie with php so any help is great. Thanks guys Nik