Counting the number of results returned by a database query in Codeigniter

Question

I am not having much luck detecting when a database query in Codeigniter returns zero results. I have had a good read of the notes on the PHP count function but am none the

Answer 1

i'm dowing this and it workd for me

Controller

$id = $this->session->userdata('id');
if($this->model_users->if_user_dont_have_email($id)){
....
}

Model Users

public function if_user_dont_have_email($id){
    $query = $this->db->query("SELECT email FROM users WHERE id='$id'");
    if ($query->num_rows() > 0) {
        $row = $query->row_array(); 
        if(empty($row['email'])){
            return true;
        }else{
            return false;
        }
    }
}