Limit download speed with PHP

Limit download speed with PHP

[Source] Dahne [edit] Dahne [Time]2012-12-12

Often encounter a problem, that is, someone else in the office to download things, affecting everyone online, office. The same problem, if it appears on the server, it is estimated that the boss will be angry, things will become worse ... Today we would like to recommend a few lines of PHP restrictions on the speed of the code, I hope to give you some help.

You do operation and maintenance of children's shoes, will often encounter a problem, that is, someone to download things in the office, affecting everyone online, office. The same problem, if it appears on the server, it is estimated that the boss will be angry, things will become worse ... Today we would like to recommend a few lines of PHP restrictions on the speed of the code, I hope to give you some help.

Code [PHP] Code


Local file that should is 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! ');

}

Limit download speed with PHP