Another new jack ineed of help

[HeadBopMusic]

Hmm ok i did that, and th ewhen i tryed to register it brought aup a Error.. so put back the orignal register.php anyone know why i got a error,, here exactly what i have there.

if($avatarid==0) $avatarid=http://www.headbopmusic.com/board/hblogosm.gif;
$homepage = trim($homepage);
if ($homepage) {
if (preg_match('#^www\.#si', $homepage)) {
$homepage = "http://$homepage";
} else if (!preg_match('#^[a-z0-9]+://#si', $homepage)) {
// homepage doesn't match the http://-style format in the beginning -- possible attempted exploit
$homepage = '';