Detecting if download was successfull

[joris]

I have a php program that triggers a download of a specific file on the server (using the header function).
When an url is clicked, this download program is triggered to start the download and a line is written to a logfile with the current username, date, time and the name of the downloaded file.

This logfile however only tells me when the link is clicked, but not if the filetransfer was successfull.

Is there a way to check with PHP if the download was successfull?

Thanx,
Joris

[xblue]

As far as I know, you can't.
In simple words, the client system simply does not tell the server what the user did with the file (or even if there was one).