Hello. I´m absolutely new as web designer for mobile phones and I have some doubts how to start.

First I need is know how to force the download of a file with extension .py, instead of open it with the browser as a textpage.
I have that code in PHP that works in IE at PC, but not in my NokiaE65. I´d like to know why.

Thank you very much


PHP Code:
<?php
    $extensiones 
= array("py"); // extensiones que permitiremos
    
$f $_GET["f"];
    if(
strpos($f,"/")!==false){
        die(
"No puedes navegar por otros directorios");
    }
    
$ftmp explode(".",$f);
    
$fExt strtolower($ftmp[count($ftmp)-1]);
 
    if(!
in_array($fExt,$extensiones)){
        die(
"<b>ERROR!</b> no es posible descargar archivos con la extensión $fExt");
    }
 
    
header("Content-type: application/octet-stream");
    
header("Content-Disposition: attachment; filename=\"$f\"\n");
    
$fp=fopen("$f""r");
    
fpassthru($fp);
?>