Php | Test | Speed limit

speed_limit.php

<?php

$filename = $_GET['file'];
$downloadRate = isset($_GET['speed']) ? intval($_GET['speed']) : 500;
 
if (file_exists($filename) && is_file($filename))
{
    header('Cache-control: private');
    header('Content-Type: application/x-shockwave-flash');  // Set MIME
    header('Content-Length: '.filesize($filename));
    header('Content-Disposition: filename='.$filename);
    flush();
    $file = fopen($filename, "r");
 
    while (!feof($file))
    {
        print fread($file, round($downloadRate * 1024));
        flush();
        sleep(1);
    }
    fclose($file);
}
else
    die('Error: The file '.$filename.' does not exist!');