PHP implementation limit Download speed example

Source: Internet
Author: User
Tags flush sleep zip

  This article mainly introduces the PHP implementation limit download speed example, need friends can refer to the following

  Code as follows://local file, should be send to the client $local _file = ' ';  //filename that the user gets as default $download _file = ' ';  //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, Rou nd ($download _rate * 1024));    //flush the content to the browser  flush ();    //Sleep One second  sleep (1); &NBSP}    //close file stream &Nbsp;fclose ($file);  }   Else { die (' error:the file '. $local _file. ' does not exist! ');}      
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