PHP has password function and downloads remote files and saves them in the local specified directory. Modify the enhanced version_PHP tutorial

File:

Pass:

# Copyright 2010 Happy Flying
# http://www.klfy.org/ For novice learning reference
set_time_limit ( 0); //No time limit 24 * 60 * 60
$password = 'admin'; //Management password
$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( );
$destination_folder = './Download/'; // The directory where downloaded files are saved. Must end with a slash
if(!is_dir($destination_folder)) //Determine whether the directory exists
mkdir($destination_folder,0777); //If not, create it and give 777 permissions. Windows ignores
$url = $_POST['url'];
$headers = get_headers($url, 1); //Get the file size
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 '

Download time: '.$runtime->spent().' Microseconds, file size '.$headers["Content-Length"].' bytes

';
echo '

Download successful! '.$showtime=date("Y-m-d H:i:s").'

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

Wrong password! Please re-enter your password!

';
}
?>