Réinitialiser le mot de passe de la fonction en php codeigniter

Je suis en train d'écrire réinitialiser le mot de passe de la fonction en php codeigniter et de l'esprit l'esprit en ne cliquant pas par où commencer et quelle est la meilleure façon de le faire svp aider

my db as like this
CREATE TABLE `members` (
 `id` int(11) NOT NULL AUTO_INCREMENT,
 `username` varchar(255) NOT NULL,
 `email` varchar(255) NOT NULL,
 `password` varchar(255) NOT NULL,
 `verifystring` varchar(15) NOT NULL,
 `lostkey` varchar(100) NOT NULL,
 `active` enum('0','1') NOT NULL,
 PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=latin1

et la fonction va comme ceci

//mot de passe oublié

 public function forget_password(){

    $this->form_validation->set_rules('email','Email Address','xss_clean|required|valid_email|callback_reset_password');
    if($this->form_validation->run() == FALSE){
    $this->load->view('account/forget_password');
    }else{

        //send an email
        $this->load->library('email');
        $this->email->set_newline("\r\n");

            $this->email->from('[email protected]', 'Raju');
            $this->email->to('[email protected]');
            $this->email->subject('Email my');
            $key = 12334455;
            $message = "Please click this url to change your password ". base_url()."reset_now/".$key ;
            $message .="<br/>Thank you very much";
            $this->email->message($message);

        if($this->email->send())
                {
                    echo 'Please check your email to reset password.';
                }

                else
                {
                    show_error($this->email->print_debugger());
                }
    }

}


//email check for forget password
function reset_password($email){
    $query = $this->db->get_where('members', array('email'=>$email));

    if(!$query->num_rows()>0){
        $this->form_validation->set_message('forget_email_check', 'The %s does not exists in our database');
        return FALSE;
    }else{

        //check database fields
        /*
        $this->db->where('email', $email);
        $this->db->limit(1);
        $Q = $this->db->get('members');
        if($Q->num_rows()>0){
            $data = $Q->result_array();

            echo $data[0]['username'].'<br/>';
            echo $data[0]['password'].'<br/>';
        }

    */

        echo '<br/>'. $email.'<br/>';
    }

    //$query->free_result();
    //return true;
}

OriginalL'auteur ktm | 2011-09-28