I was surprised PHP's filesize() fails on absolute paths?? My files are on my own server, how can I get the filesize except from converting them to relative (a mess)

EDIT

Örnek:

$filename = 'http://172.16.xx.x/app/albums/002140/tn/020.jpg';
echo $filename . ': ' . filesize($filename) . ' bytes';

Warning: filesize() [function.filesize]: stat failed for http://172.16.xx.x/app/albums/002140/tn/020.jpg in /Applications/XAMPP/xamppfiles/htdocs/app/admin/+tests/filesize.php on line 26

END EDIT

Ben uzak dosyaları için bu örneği bulundu:

$filename = 'http://www.google.com/logos/2010/stevenson10-hp.jpg';
$headers = get_headers($filename, 1);
echo $headers['Content-Length']; // size in bytes

Dosyaları indirirken olmadan bu işler?