Corrupted ZIP files

On some servers files downloaded with this addon are corrupted. Both file sizes (the good one and corrupted one) are the same. After commenting the line below, the problem disappears.

header('Content-Length: ' . filesize($src));

But this is short time solution. There is no errors in log file.

Can you open the corrupted file and see if there is any other output in it? Like HMTL notices, or errors? In that case this might be helpful:

    $fh = fopen($src, 'r');
    while ($buffer = fread($fh, 1024)) echo $buffer;
    fclose($fh);```

Ok - my bad! There was a notice on the top of file. Thanks!