How can I know a user is complete downloaded my file?

[roteee]

I have a simple script to read and return the image (or other media file) to downloader like this:

<?php
    header("Content-type: image/jpeg");
    header("Content-Disposition: attachment; filename=imageName.jpg");
    readfile("/Path/to/my/mediaFile/imageName.jpg");
?>

For this simple script I don't know that the downloader is complete downloaded my file or not.

How can I do to know this?

Thank you in advance for all help 🙂

[roteee]

Any suggestion pleaseee 😕

[darkerstar]

Because the download script is run at server level, it won't be able to find out what happens at the client site. If the output is a HTML content, then you can find it out by Javascript, but since the download is image, you can't do it.

Maybe you can find it out in the apache log or something. Are there any network or apache expert in this Forum?

Regards
William