How to change password in CodeIgniter framework

In this example we are going to show you How to change password in CodeIgniter framework PHP.

Here we using 3 files for insert data in MySQL:

• Forms.php Path: codeIgniter\application\controllers\Forms.php
• Form_model.php Path: codeIgniter\application\models\Form_model.php
• change_pass.php Path: codeIgniter\application\views\change_pass.php

Forms.php (Controller)

<?php 
class Forms extends CI_Controller 
{
public function __construct()
{
//call CodeIgniter's default Constructorparent::__construct();
//load database libray manually$this->load->database();
$this->load->library('session');
//load Model$this->load->helper('url');
$this->load->model('Form_model');
} 
public function change_pass()
{
if($this->input->post('change_pass'))
{
$old_pass=$this->input->post('old_pass');
$new_pass=$this->input->post('new_pass');
$confirm_pass=$this->input->post('confirm_pass');
$session_id=$this->session->userdata('id');
$que=$this->db->query("select * from user_login where id='$session_id'");
$row=$que->row();
if((!strcmp($old_pass, $pass))&& (!strcmp($new_pass, $confirm_pass))){
$this->Form_model->change_pass($session_id,$new_pass);
echo "Password changed successfully !";
}
else{
echo "Invalid";
}
}
$this->load->view('change_pass');
}
}
?>

Form_model.php (Model)

<?php
class Form_model extends CI_Model 
{
function fetch_pass($session_id)
{ $fetch_pass=$this->db->query("select * from user_login where id='$session_id'");
$res=$fetch_pass->result();
}
function change_pass($session_id,$new_pass)
{
$update_pass=$this->db->query("UPDATE user_login set pass='$new_pass' where id='$session_id'");
}
}

change_pass.php (View)

<!DOCTYPE html>
<html>
<head>
<title>Login Form</title>
<link rel="stylesheet" type="text/css" href="css/style.css">
<link href='http://fonts.googleapis.com/css?family=Source+Sans+Pro|Open+Sans+Condensed:300|Raleway' rel='stylesheet' type='text/css'>
</head>
<body>
<div id="main">
<div id="login">
<?php echo @$error; ?>
<h2>Change Password</h2>
<br>
<form method="post" action=''>
<label>Old Password :</label>
<input type="password" name="old_pass" id="name" placeholder="Old Pass"/><br /><br />
<label>New Password :</label>
<input type="password" name="new_pass" id="password" placeholder="New Password"/><br/><br/>
<label>Confirm Password :</label>
<input type="password" name="confirm_pass" id="password" placeholder="Confirm Password"/><br/><br />
<input type="submit" value="login" name="change_pass"/><br />
</form>
</div>
</div>
</body>
</html>

Run the program on your browser with URL:

http://localhost/codeIgniter/index.php/Forms/change_pass

Here codeIgniter is my folder name. Put your folder name instead of codeIgniter.Rest of things are same.