resetting password in codeigniter - codeigniter

Question

i'm new to codeigniter, and i am attempting to create a password reset system
this is my controller:
public function changePassword(){
if($this->session->userdata('loginuser'))
{
$session_data = $this->session->userdata('loginuser');
$email = $this->session->userdata('email');
$data['email'] = $email;
$data['title'] = 'Change my Password | Watch Stop';
$this->load->view('template/header', $data);
$this->load->view('watch_stop/vpassword', $data);
$this->load->view('template/footer');
}
else
{
//If no session, redirect to login page
redirect('login', 'refresh');
}
}
public function reset_password(){
if($this->session->userdata('loginuser'))
{
$session_data = $this->session->userdata('loginuser');
$email = $this->session->userdata('email');
$data['email'] = $email;
//validating form
$this->form_validation->set_rules('old_password','Old Password','trim|required|min_length[5]|md5');
$this->form_validation->set_rules('new_password','New Password','trim|required|min_length[5]|matches[cnew_password]|md5');
$this->form_validation->set_rules('cnew_password','Confirm Password','trim|required||md5');
if ($this->form_validation->run() == FALSE)
{
$this->changePassword();
//$this->session->set_flashdata('msg','<div class="alert alert-danger text-center">Failed to update password</div>');
}else {
$query=$this->customer_model->change_password();
$data = array( "main_content" => 'includes/memberadmin/memberadmin_cpass_process',
"query" => $query
);
$this->load->view('includes/memberadmin/template',$data);
}
}
else
{
//If no session, redirect to login page
redirect('login', 'refresh');
}
}
this is my model:
function change_password(){
$this->db->select('id');
$this->db->where('email',$this->session->userdata('email'));
$this->db->where('password',$this->input->post('old_password'));
$query=$this->db->get('user');
if ($query->num_rows() > 0)
{
$row = $query->row();
if($row->email===$this->session->userdata('email'))
{
$data = array(
'new_password' => $this->input->post('new_password')
);
$this->db->where('email',$this->session->userdata('email'));
$this->db->where('new_password',$this->input->post('old_password'));
if($this->db->update('user', $data))
{
return "Password Changed Successfully";
}else{
return "Something Went Wrong, Password Not Changed";
}
}else{
return "Something Went Wrong, Password Not Changed";
}
}else{
return "Wrong Old Password";
}
}
When i click on the update button in my reset password page, i am getting the following error for my new password confirmation field: Unable to access an error message corresponding to your field name Confirm Password.()
please help!

Answer 1

1) there are two pipe signs near required||md5
$this->form_validation->set_rules('cnew_password','Confirm Password','trim|required||md5');
change it to
$this->form_validation->set_rules('cnew_password','Confirm Password','trim|required|md5');
2) changing input to md5 at this stage is not good.
You have to use password_hash function.
Read More >> http://php.net/manual/en/function.password-hash.php
3) You forgot to load model. $this->load->model('customer_model');