PHP下载文件函数

一个PHP下载函数,在写服务器的时候可以用到。

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >

<head>

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />

<meta http-equiv="Content-Language" content="UTF-8" />

</head>

<form method="post">

<input name="url" size="20" />

<input name="submit" type="submit" />

<!-- <input type="hidden" name="MAX_FILE_SIZE" value="2097152" />-->

</form>

<?php

set_time_limit(24*60*60);

if (!isset($_POST['submit'])) die ();

$destination_folder = './down/'; // 文件夹保存下载文件。必须以斜杠结尾

$url = $_POST['url'];

$newfname = $destination_folder.basename($url);

$file = fopen($url, "rb");

if ($file) {

$newf = fopen($newfname, "wb");

if ($newf) while (!feof($file)) {

fwrite($newf, fread($file, 1024*8), 1024*8);

}

}

if ($file) {

fclose($file);

}

if ($newf) {

fclose($newf);

}

?>