How can PHP developers effectively troubleshoot and debug download issues, especially when downloads are breaking off at specific points?

To effectively troubleshoot and debug download issues in PHP, especially when downloads are breaking off at specific points, developers can check for errors in the file handling process, ensure that the file is being read and transmitted correctly, and monitor the download progress to identify where the issue occurs. 

<?php

$file = 'example.zip';

if (file_exists($file)) {
    header('Content-Description: File Transfer');
    header('Content-Type: application/octet-stream');
    header('Content-Disposition: attachment; filename="' . basename($file) . '"');
    header('Expires: 0');
    header('Cache-Control: must-revalidate');
    header('Pragma: public');
    header('Content-Length: ' . filesize($file));

    ob_clean();
    flush();
    readfile($file);
    exit;
} else {
    echo 'File not found.';
}

Keywords

PHP debugging troubleshooting download issues file streaming

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