Simulate slow downloads. Usage: slow-downloader.php?path=static/videos/intro.mp4

slow-downloader.php

<?php
	// 128KB/100ms 
	$ms = 100;
	$size = 128;

	$path = $_GET['path'];

	if (empty($path)) {
		return;
	}

	$fileContents = file_get_contents($path);
	$finfo = finfo_open(FILEINFO_MIME_TYPE);

	$contentType = finfo_file($finfo, $path);
	$contentLength = strlen($fileContents);

	header('Content-Length: ' . $contentLength);
	header('Content-Type: ' . $contentType);

	$increment = 1024 * $size;
	for ($i = 0; $i <= $contentLength; $i += $increment) {
		echo substr($fileContents, $i, $increment);
		usleep(1000 * $ms);
	}