How does php limit file download speed? PHP File download speed limit instance code

PHP How to control file download speed, PHP program to implement file download, sometimes need speed limit download, in fact, with the PHP header function can control the file download speed, here to share two PHP instance code, for your reference. First, the PHP control file download speed method. Code: Copy Codecode example: Second, PHP download limit speed code PHP Limits Download Speed implementation code : Copy Codecode example://local file that should is send to the Client$local_file = ' test-file.zip ';//filename that the user gets as Defaul T$download_file = ' your-download-name.zip ';//Set the download rate limit (= = 20,5 kb/s) $download _rate = 20.5;if (file_e Xists ($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 ($download _rate * 1024x768));//F Lush the content to the browser flush (); Sleep One Second sleep (1); }//Close file stream fclose ($file);} else {die (' error:the file '. $local _file. ' does not exist! ');}

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