jshensh

// 下载
<?php
$file = './Penguins.jpg';
$file_display_name = basename($file);
$fsize = @filesize($file);
if (!empty($fsize)) {			
	$start = null; 
	$end = $fsize - 1;
	if (isset($_SERVER['HTTP_RANGE']) && $_SERVER['HTTP_RANGE'] !== "" && preg_match("/^bytes=([0-9]+)-([0-9]*)$/i", $_SERVER['HTTP_RANGE'], $match) && $match[1] < $fsize && $match[2] < $fsize) {     
		$start = $match[1];