progress enabled file server

download.php

<?php
set_time_limit(0);

$filename = 'bigfile.txt';
$f = fopen($filename, 'r');
$i = 0;
$chunk = 2;
$each = 100 / (filesize($filename) / $chunk);

while (true) {
    if (feof($f)) {
        break;
    }

    $data = fread($f, $chunk);
    error_log("file download progress: " . ($i * $each) . "%");
    $i++;
    echo $data;
    sleep(1);
}

fclose($f);

正常使用删掉sleep即可。chunk可以改大点。