What are the limitations of using PHP for creating a download progress bar?

When using PHP to create a download progress bar, one limitation is that PHP is not well-suited for real-time updates or tracking the progress of a file download. To overcome this limitation, you can use JavaScript in combination with PHP to provide a more dynamic and interactive progress bar for the user. 

// PHP code to handle file download and track progress
$file = 'example.zip';
$filepath = '/path/to/files/' . $file;

header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename="' . basename($filepath) . '"');
header('Content-Length: ' . filesize($filepath));

$chunkSize = 1024 * 1024; // 1MB
$handle = fopen($filepath, 'rb');
while (!feof($handle)) {
    echo fread($handle, $chunkSize);
    ob_flush();
    flush();
}
fclose($handle);

Keywords

PHP download progress bar limitations file handling AJAX

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