function upload_image($elementname, $folder, $newname)
{
$type = substr($_FILES[$name]['type'],0,5);

if($type == "image")
{
$file_extension = substr($_FILES[$elementname]['name'],-3,3);
$filename = "$newname.$file_extension";
$destination = "../$folder/$filename";

if(file_exists($destinaton))
unlink($destination);
if(copy($_FILES[$elementname]['tmp_name'], $destination))
return $filename;
else
return "nopic.jpg";
}
return "none";
}
?>

รูปแบบการใช้งาน

$picturename = upload_image("photo", "images", $filename);