save dialog box

[stiffa]

ciao.
come si fa a far apparire la dialog box per il save di un file?

[stiffa]

mi rispondo da solo

 $currentdir = '../mp3'; 

$filename = "$trackname.mp3"; 
$pathname = "$currentdir/$filename";     
                     
$fr   = fopen($pathname, 'r'); 
$filedata = fread($fr, filesize($pathname)); 
fclose($fr); 
                     
header ( 'Content-Length: ' . filesize ( $pathname ) ); 
header("Content-type: application/octet-stream"); 
header("Content-disposition: attachment; filename=$filename"); 
readfile($pathname);