Function, variable meegeven

<?   
function optellen($getal1, $getal2)   
{   
$getal3 =$getal1+$getal2;   
return $getal3;   
}   
?> 

<?   
function optellen($getal1, $getal2)   
{   
$getal3 =$getal1+$getal2;   
return $getal3;   
}   
?>