Function problem

[ligraci]

Hi to all!
I've this code

<?
function namefunc($dataproc) {
$g=substr($dataproc, 6, 2);
$m=substr($dataproc, 4, 2);
$a=substr($dataproc, 0, 4);

$txt=$g.$m.$a;
}

$dataok="1111111";
namefunc($dataok);

echo $txt;
?>

The problem is that "echo $txt" does not print nothing.
Can u tell me why?

Thanks ^_

[hand]

<? 
function namefunc($dataproc) { 
   $g=substr($dataproc, 6, 2); 
   $m=substr($dataproc, 4, 2); 
   $a=substr($dataproc, 0, 4); 
   $txt=$g.$m.$a; 
   return $txt;
} 

$dataok="1111111"; 
$xxx = namefunc($dataok); 
echo $xxx; 
// or 
print namefunc($dataok); 
?> 

[ligraci]

Yes, that's it!

Thanks hand!