how can i partial upload a file using content-range?
iam using 'fsockopen' to upload the file

$data .="Accept-Ranges: bytes\r\n\r\n";
$data .="Content-Range: bytes 0-".($_FILES['userfile']['size']-1)."\r\n\r\n";
is not working.

 The content range header should be in the following format:

Content-Disposition: form-data; name="fileContent"; filename="myfile.dat"\r\n
Content-Type: binary/octet-stream\r\n
Content-Range: 0-4/5\r\n
\r\n

Thanks Barry.

i tried the Content-Range: 0-127/560 for a file of 560 bytes

but result in an error

Error:Invalid upload request: the content-range must be contiguous; expected=128, actual=0.

 This error will occur when you have already uploaded bytes 0-127 and we are waiting for byte 128+ to come.  I'm guessing in your loop you called it a second time without incrementing the position.  The second send in this case would be 128-256/560, then just repeat until you are at the end of the file.  When you get a bit closer be sure to use chunks of about 4 Mb each or you could see significant performance impact.

Regards,
     Barry R.