这篇文章主要介绍了php实现限制下载速度的示例,需要的朋友可以参考下
复制代码 代码如下:
// 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!');
}
，