Http_range

How/When is $_SERVER['HTTP_RANGE'] or $_ENV['HTTP_RANGE'] set? I am working on a resume download script that requires the HTTP_RANGE to be set... but no matter what i do i cant find how/when its set. Thanks.

http://www.php.net/reserved.variables
can't even find range on there

a google search will show plenty of references to it.... strange.

http://tools.ietf.org/id/draft-ietf-http-range-retrieval-00.txt

This link explains a lot about HTTP_RANGE. It still leaves out two important points...

The server will send this header only for documents for which it will
be able to satisfy the byte range request, e.g. for PDF documents, or
images, which can be partially reloaded if the user interrupts the
page load, and image gets only partially cached.

What types of files satisfy the byte range request? also,

The Request-Range header is simply ignored
by a server that does not support it, and it will send the entire
document as a response.

How do i know if my server supports it?

test.php
if(isset($_SERVER['HTTP_RANGE'])){
echo 'its set';
}else{
echo 'Doesnt look like it';
}

??

Still looking for info on this subject. thanks.

Maybe this will help you.

http://www.justskins.com/forums/resume-downloads-81296.html

@demtron - thanks for the link, but i have seen it and tried the code.. no worky.