wordpress login in external php

Add into top
require_once(FCPATH.'blog/wp-config.php');

add this into controller 

echo $password  = $_POST['password'];//$_POST['password'];
echo $email     = $_POST['mail_id'];//$this->input->post('mail_id');


$user_id   = email_exists($email);
$user_info = get_userdata($user_id);

$user_name = $user_info->data->user_login;
$status    = wp_check_password($password, $user_info->data->user_pass, $user_id);
//print_r($user_info);
/* $user = get_user_by( 'login', $email );

$user_info = get_userdata($user_id);
$user_name = $user_info->data->user_login;
echo $status    = wp_check_password($password, $user_info->data->user_pass, $user_id);
$user = get_user_by( 'login', $user_id );*/
if ($user_name && $status == 1){
    $creds                  = array();
$creds['user_login']    = $user_name;
$creds['user_password'] = $password;
$creds['remember']      = true;
$user                   = wp_signon($creds, false);
if (is_wp_error($user)){
echo $user->get_error_message();
}else {
echo "Login";
//die('Success');

}
}else{
    echo "incorrect password";
//die('Error');
}

thats it...........enjoy :)