insert data into database with codeigniter

Question

Trying to insert a row into my database with CodeIgniter.

My database table is Customer_Orders and the fields are CustomerName and Or

Answer 1

function saveProfile(){
    $firstname = $this->input->post('firstname');
    $lastname = $this->input->post('lastname');
    $post_data = array('firstname'=> $firstname,'lastname'=>$lastname);
    $this->db->insert('posts',$post_data);
    return $this->db->insert_id(); 
}