强制下载标头不能按预期工作

I was expecting that for each link found on the webpage the script could download a html file on my pc, asking me where to put the file(in which folder)... but instead the code download all the files on a folder on the server (the same where the php file is). I even try to erase the force download but nothing change.

What I do wrong? Thanks in advance.

this is my code:

$srcUrl= 'http://www.example.com/index.php';
$base= 'http://www.example.com/';

$html = file_get_contents($srcUrl);

$dom = new DOMDocument();
@$dom->loadHTML($html);

// grab all the on the page
$xpath = new DOMXPath($dom);

//finding the a tag
$hrefs = $xpath->evaluate("/html/body//a");

header('Content-disposition: attachment; filename=' . $filename);
header("Content-Type: application/force-download");
header('Content-type: text/html');


//Loop to display all the links and download
for ($i = 0; $i < $hrefs->length; $i++) {
    $href = $hrefs->item($i);
    $url = $href->getAttribute('href');

    //if real link
    if($url!='#') {

        //check if url is ok
        $www= filter_var($url, FILTER_VALIDATE_URL, FILTER_FLAG_PATH_REQUIRED);

if ($www == false )
{
       //change the bad ones in absolute url;
        $url2 = make_absolute($url, $base);


        //Code to get the file...
        $data = file_get_contents($url2);

        //save as?
        $filename = $url;

        file_put_contents($filename, $data);

        //a time to rest
        sleep(5);
    }

    }
}

?>