note 65404 deleted from function.header by felipe

Note Submitter: php.net[at]macosbrain[dot]com 

----

at first one advise to Jon's post (09-Mar-2006 01:38) 
the "function downloadFile ($file, $mimetype)" can NOT resume downloads. 
the function sent every time the same file just with different header informations.

this function will work
<?php
function output_file($file,$name)
{
//do something on download abort/finish
//register_shutdown_function( 'function_name'  );
if(!file_exists($file))
die('file not exist!');
$size = filesize($file);
$name = rawurldecode($name);

if (ereg('Opera(/| )([0-9].[0-9]{1,2})', $_SERVER['HTTP_USER_AGENT']))
$UserBrowser = "Opera";
elseif (ereg('MSIE ([0-9].[0-9]{1,2})', $_SERVER['HTTP_USER_AGENT']))
$UserBrowser = "IE";
else
$UserBrowser = '';

/// important for download im most browser
$mime_type = ($UserBrowser == 'IE' || $UserBrowser == 'Opera') ?
 'application/octetstream' : 'application/octet-stream';
@ob_end_clean(); /// decrease cpu usage extreme
header('Content-Type: ' . $mime_type);
header('Content-Disposition: attachment; filename="'.$name.'"');
header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
header('Accept-Ranges: bytes');
header("Cache-control: private");
header('Pragma: private');

/////  multipart-download and resume-download
if(isset($_SERVER['HTTP_RANGE']))
{
list($a, $range) = explode("=",$_SERVER['HTTP_RANGE']);
str_replace($range, "-", $range);
$size2 = $size-1;
$new_length = $size-$range;
header("HTTP/1.1 206 Partial Content");
header("Content-Length: $new_length");
header("Content-Range: bytes $range$size2/$size");
}
else
{
$size2=$size-1;
header("Content-Length: ".$size);
}
$chunksize = 1*(1024*1024);
$this->bytes_send = 0;
if ($file = fopen($file, 'r'))
{
if(isset($_SERVER['HTTP_RANGE']))
fseek($file, $range);
while(!feof($file) and (connection_status()==0))
{
$buffer = fread($file, $chunksize);
print($buffer);//echo($buffer); // is also possible
flush();
$this->bytes_send += strlen($buffer);
//sleep(1);//// decrease download speed
}
fclose($file);
}
else
die('error can not open file');
if(isset($new_length))
$size = $new_length;
die();
}
?>
http://macosbrain.ath.cx/wordpress/2006/04/30/
for some comments in german.