Making my own plugin, starting from scratch, some PHP questions (my ongoing adventure

[jwocky]

Ok using that info this is the php line I came up with:

PHP Code:

$vbulletin->db->query_write("UPDATE user SET usergroupid = '9' WHERE userid = '" . $username . "' LIMIT 1"); 


$username actually defines the userid#.. i've checked to make sure its right through an $echo statement beforehand..

anyways, this just doesnt work, this is the error I keep getting..

Fatal error: Call to a member function on a non-object on line 37