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不是速度慢,而是我用PHP限制网速了!

WBOY
Release: 2016-06-21 08:50:50
Original
1136 people have browsed it

各位做运维和开发的童鞋,会经常遇到一个问题,那就是有人在办公室下载东西,网速自然而然地被拉下来了,影响大家上网、办公。同样的问题,要是出现在了服务器上面,估计会让老板发火,事情发展的会更糟……今天特此想大家推荐几行关于PHP限制网速的代码,希望给大家一些帮助。



[代码] [PHP]代码

  // 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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