php怎麼限制檔案下載速度？php檔案下載限速執行個體代碼

php怎麼控制檔案下載速度，php編寫的程式中實現檔案下載，有時需要限速下載，其實用php header函數就可以控制檔案下載速度，這裡分享二個php執行個體代碼，供大家參考。 一、php控制檔案下載速度的方法。 代碼： 複製代碼 程式碼範例: 二、php下載限制速度代碼 php限制下載速度實現代碼： 複製代碼 程式碼範例:// 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!');}

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