How to limit the download speed in 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. In the same case, if you encounter a problem on the server, you may 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 shocould be sent to the client

02	Comment ';

03

04	// Filename that the user gets as default

05	Unzip download_file+'your-download-name.zip ';

06

07	// Set the download rate limit (=> 20, 5 kb/s)

08	$ Download_rate = 20.5;

09

10	If (file_exists ($ local_file) & is_file ($ local_file )){

11

12	// Send headers

13	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 content

19

Flush ();

20

21	// Open file stream

22	$ File = fopen ($ local_file, "r ");

23

24	While (! Feof ($ file )){

25

26	// Send the current file part to the browser

27	Printfread ($ file, round ($ download_rate * 1024 ));

28

29	// Flush the content to the browser

30

Flush ();

31

32	// Sleep one second

33	Sleep (1 );

34

}

35

36	// Close file stream

37	Fclose ($ file );

38

39

}

40

41

Else {

42	Die ('error