What could be causing only a portion of a large file to be downloaded when using the Download class?

The issue could be caused by the server timing out or the connection being interrupted during the download process. To solve this issue, you can increase the timeout value for the download or implement a way to resume the download from where it left off.

$download_url = 'http://example.com/large_file.zip';
$download_file = 'large_file.zip';

$download = new Download($download_url);
$download->setDownloadTimeout(600); // Set timeout to 10 minutes

$download->setDownloadPath($download_file);
$download->download();