details not being pull from databse table user login

[eluser]learning_php[/eluser]
Hi,

I have been trying to create a user login but if i enter deatils that i know are in the databse table it siplays the error message?

Code:

<?PHP
class Login extends Controller{
    
    function login(){
        parent::Controller();
    }        
    
    function index(){
        if ($this->session->userdata('logged_in')== true)
        {
            redirect('dashboard');
        }
        $data['username'] = array('id'=> 'username');
        $data['password'] = array('id'=> 'password');
        $this->load->view('login',$data);
    }
    
    function process_login()
    {
        $this->db->get('members');
        $username = $this->db->select("username");
        $password = $this->db->select("password");
        
        if($username=='username' AND $password=='password')
        {
            $data = array('username'=>$username,'logged_in'=>true);
            $this->session->set_userdata($data);
            redirect('dashboard/index');
        
        }
        else{
                $this->session->set_flashdata('message','<div id="message">you have entered the wrong details</div>');
            redirect('login/index');
        }
    }
        function logout(){
        $this->session->sess_destroy();
        redirect('login/index');
        }
    
}
?&gt;

Code:

<?PHP echo form_open('login/process_login') . "\n";?>
    <?PHP echo form_fieldset('login') . "\n";?>
        
        <?PHP echo $this->session->flashdata('message');?>
        
        <p><label for="username"> Username: </label>&lt;?PHP echo form_input($username);?&gt;</p>
        <p><label for="password"> password: </label>&lt;?PHP echo form_password($password);?&gt;</p>
        <p>&lt;?PHP echo form_submit('login','login');?&gt;
        &lt;?PHP echo form_fieldset_close();?&gt;
    &lt;?PHP echo form_close();?&gt;