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【PHP】控制下载速度

作者:步山 / 发布于2014/11/10/ 495


	// local file that should be send to the client
	$local_file = 'test-file.zip';

	// filename that the user gets as default
	$download_file = 'your-download-name.zip';

	// set the download rate limit (=> 20,5 kb/s)
	$download_rate = 20.5;

	if(file_exists($local_file) && is_file($local_file)) {

	// send headers
	header('Cache-control: private');
	header('Content-Type: application/octet-stream');
	header('Content-Length: '.filesize($local_file));
	header('Content-Disposition: filename='.$download_file);

	// flush content
	flush();

	// open file stream
	$file = fopen($local_file, "r");

	while (!feof($file)) {

	// send the current file part to the browser
	print fread($file, round($download_rate * 1024));

	// flush the content to the browser
	flush();

	// sleep one second
	sleep(1);
	}

	// close file stream
	fclose($file);

	}

	else {
	die('Error: The file '.$local_file.' does not exist!');
	}

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　控制下载速度　　控制下载　　下载速度　

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