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php怎么控制文件下载速度，php编写的程序中实现文件下载，有时需要限速下载，其实用php header函数就可以控制文件下载速度，这里分享二个php实例代码，供大家参考。
一、php控制文件下载速度的方法。 代码： 复制代码 代码示例:二、php下载限制速度代码 php限制下载速度实现代码： 复制代码 代码示例: // 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!'); } |
