How can PHP be used to limit download speeds for large files?

To limit download speeds for large files in PHP, you can use the `readfile()` function along with `sleep()` to control the download speed. By reading the file in chunks and adding a delay between each chunk, you can effectively limit the download speed for users accessing large files. 

$file = 'path/to/large/file.zip';
$chunk_size = 1024; // 1KB
$download_speed = 1024; // 1KB per second

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

$handle = fopen($file, 'rb');
while (!feof($handle)) {
    echo fread($handle, $chunk_size);
    flush();
    sleep($chunk_size / $download_speed);
}
fclose($handle);

Keywords

PHP download speeds large files bandwidth throttling file streaming

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