header ("Cache-Control: must-revalidate, post-check=0, pre-check=0");


header ("Content-Type: application/octet-stream");


header ("Content-Length: " . filesize($file_path));


header ("Content-Disposition: attachment; filename=$file_name");


readfile($file_path);

Order allow,deny


Allow from xxx.xxx.xxx.xxx

// credits go to the original author(s) found here


// http://us3.php.net/manual/en/function.readfile.php#54295





function readfile_chunked($filename,$retbytes=true) {


   $chunksize = 1*(1024*1024); // how many bytes per chunk


   $buffer = '';


   $cnt =0;


   // $handle = fopen($filename, 'rb');


   $handle = fopen($filename, 'rb');


   if ($handle === false) {


       return false;


   }


   while (!feof($handle)) {


       $buffer = fread($handle, $chunksize);


       echo $buffer;


       ob_flush();


       flush();


       if ($retbytes) {


           $cnt += strlen($buffer);


       }


   }


       $status = fclose($handle);


   if ($retbytes && $status) {


       return $cnt; // return num. bytes delivered like readfile() does.


   }


   return $status;





}

// these variables will be set by the getit() function


// in one way or another





$file_path = "http://filestorage.com/folder/file.zip";


$file_name = "file.zip";





header ("Cache-Control: must-revalidate, post-check=0, pre-check=0");


header ("Content-Type: application/octet-stream");


header ("Content-Length: " . filesize($file_path));


header ("Content-Disposition: attachment; filename=$file_name");


readfile_chunked($file_path);