php实现下载限制速度示例分享
这篇文章主要介绍了php实现限制下载速度的示例,需要的朋友可以参考下
// 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!'); }