What are common pitfalls when setting download rates in PHP scripts?

Common pitfalls when setting download rates in PHP scripts include not properly limiting the download speed, leading to high server load and potential denial of service attacks. To solve this issue, it is important to implement rate limiting to control the download speed and prevent abuse. 

// Limit download speed to 100 KB/s
$download_rate = 100; // KB/s
$buffer_size = $download_rate * 1024; // Convert KB to bytes

$file_path = "path/to/file.zip";

header("Content-Type: application/octet-stream");
header("Content-Disposition: attachment; filename=\"" . basename($file_path) . "\"");

$handle = fopen($file_path, "rb");
while (!feof($handle)) {
    echo fread($handle, $buffer_size);
    flush();
    sleep(1); // Limit download speed
}
fclose($handle);

Keywords

rate limiting download speed PHP headers file size bandwidth control

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