HELP joining tables...

[eluser]Ochetski[/eluser]
The first error means that the variable $userId is not defined.
I see it here:
$this->db->where('choy_user_id', $userId);

And the second error means that your preg_match function is receiving a wrong parameter, it should be text but you've sent an object, maybe something like $this->input when it must be $this->input->post('test'), check the second parameter of it somewhere.