php带密码功能并下载远程文件保存本地指定目录 修改加强版

File:

Pass:

# Copyright 2010 快乐飞扬
# http://www.klfy.org/ 供新手学习参考
set_time_limit (0); //不限时 24 * 60 * 60
$password = 'admin'; //管理密码
$pass = $_POST['password'];
if ($pass == $password) {
class runtime {
var $StartTime = 0;
var $StopTime = 0;
function get_microtime(){list($usec,$sec) = explode(' ',microtime());
return ((float)$usec + (float)$sec);}
function start() {$this->StartTime = $this->get_microtime();}
function stop() {$this->StopTime = $this->get_microtime();}
function spent() { return round(($this->StopTime - $this->StartTime) * 1000,1);}
}
$runtime= new runtime;
$runtime->start();
if (!isset($_POST['submit'])) die();
$destination_folder = './Download/'; // 下载的文件保存目录。必须以斜杠结尾
if(!is_dir($destination_folder)) //判断目录是否存在
mkdir($destination_folder,0777); //若无则创建，并给与777权限 windows忽略
$url = $_POST['url'];
$headers = get_headers($url,1); //得到文件大小
if ((!array_key_exists("Content-Length",$headers))) {$filesize=0; }
$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);}
$runtime->stop();
echo '

下载耗时:spent().' 微秒,文件大小字节

';
echo '

';
}elseif(isset($_POST['password'])){
echo '

';
}
?>