Ok, how would i fix this up so that the fields $name and $comm must be filled in?

PHP Code:

<?
$date = date("d.m.y");
    $fp = fopen("comment.txt","a+"); 
    fwrite($fp,nl2br("<table border=1 width=276 height=16><td width=128 height=4>Name:$name</td><td width=132 height=4>Date:$date</td><tr><td width=266 height=9 colspan=2>$comm</td></tr></table><br>"));
echo "Thank you, your comment has been Posted!";
    fclose($fp);
?>

Never mind, I fixed it, Incase you want to know, I added if ($name && $comm) { before the script!!! thanks anyway