Limit download speed using PHP

When you are doing O & M, you will often encounter a problem, that is, someone downloads something in the office, affecting Internet access and office work. If the same problem occurs on the server, it is estimated that the boss will get angry and things will get worse ...... Today, I would like to recommend several lines of code to limit the network speed of PHP. I hope to help you.

[Code][PHP] Code view sourcePrint?01// local file that should be send to the client02$local_file = 'test-file.zip';03 04// filename that the user gets as default05$download_file = 'your-download-name.zip';06 07// set the download rate limit (=> 20,5 kb/s)08$download_rate = 20.5;09 10if(file_exists($local_file) && is_file($local_file)) {11 12 // send headers13 header('Cache-control: private');14 header('Content-Type: application/octet-stream');15 header('Content-Length: '.filesize($local_file));16 header('Content-Disposition: filename='.$download_file);17 18 // flush content19 flush();20 21 // open file stream22 $file = fopen($local_file, "r");23 24 while (!feof($file)) {25 26 // send the current file part to the browser27 print fread($file, round($download_rate * 1024));28 29 // flush the content to the browser30 flush();31 32 // sleep one second33 sleep(1);34 }35 36 // close file stream37 fclose($file);38 39}40 41else {42 die('Error: The file '.$local_file.' does not exist!');43}