To change password in mysql - php

Question

In the below codeigniter code i have placed controller and model i can login by entering username and password.Now i have to implement is to change password.Pls anyone help me to solve the issue.
Controller:
<?php
class Login extends CI_Controller {
function index()
{
$data['main_content'] = 'login_form';
$this->load->view('includes/template', $data);
}
function validate_credentials()
{
$this->load->model('membership_model');
$query = $this->membership_model->validate();
if($query) // if the user's credentials validated...
{
$data = array(
'username' => $this->input->post('username'),
'is_logged_in' => true
);
$this->session->set_userdata($data);
redirect('site1/members_area');
}
else // incorrect username or password
{
$this->index();
}
}
function signup()
{
$data['main_content'] = 'signup_form';
$this->load->view('includes/template', $data);
}
function create_member()
{
$this->load->library('form_validation');
// field name, error message, validation rules
$this->form_validation->set_rules('first_name', 'Name', 'trim|required');
$this->form_validation->set_rules('last_name', 'Last Name', 'trim|required');
$this->form_validation->set_rules('email_address', 'Email Address', 'trim|required|valid_email');
$this->form_validation->set_rules('username', 'Username', 'trim|required|min_length[4]');
$this->form_validation->set_rules('password', 'Password', 'trim|required|min_length[4]|max_length[32]');
$this->form_validation->set_rules('password2', 'Password Confirmation', 'trim|required|matches[password]');
$this->load->helper('date');
if($this->form_validation->run() == FALSE)
{
$this->load->view('signup_form');
}
else
{
$this->load->model('membership_model');
if($query = $this->membership_model->create_member())
{
$data['main_content'] = 'signup_successful';
$this->load->view('includes/template', $data);
}
else
{
$this->load->view('signup_form');
}
}
}
function logout()
{
$this->session->sess_destroy();
$this->index();
}
}
?>
model:
<?php
class Membership_model extends CI_Model {
function validate()
{
$this->db->where('username', $this->input->post('username'));
$this->db->where('password', md5($this->input->post('password')));
$query = $this->db->get('membership');
if($query->num_rows == 1)
{
return true;
}
}
function create_member()
{
$new_member_insert_data = array(
'first_name' => $this->input->post('first_name'),
'last_name' => $this->input->post('last_name'),
'email_address' => $this->input->post('email_address'),
'username' => $this->input->post('username'),
'date' => date('Y-m-d H:i:s', now()),
'password' => md5($this->input->post('password'))
);
$insert = $this->db->insert('membership', $new_member_insert_data);
if ($this->db->_error_number() == 1062)
{
echo"<script>alert('This value already exists');</script>";
}
if ($this->db->_error_number() == "")
{
$this->session->set_flashdata('create', 'create');
}
return $insert;
}
function curdate() {
// gets current timestamp
date_default_timezone_set('Asia/Manila'); // What timezone you want to be the default value for your current date.
return date('Y-m-d H:i:s');
}
}

Answer 1

You can follow these simple steps:
Create a view with the change password form (i.e. email, current password and new password)
Create in your controller a function that retrieve the data from the form and check if exists user with that email and that password
Create a function in your model to make the update with $this->db->update()
From your controller run the model function