php實現限制下載速度的樣本

 這篇文章主要介紹了php實現限制下載速度的樣本,需要的朋友可以參考下

 代碼如下:// 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!');}