function user_registration()
{
    $user = new User();
    global $main_db, $session;
    if (isset($_POST['action'])) {
        $fields = $_POST['fields'];
        $data = array();
        foreach ($fields as $field) {
            $data[$field['name']] = $field['value'];
        }
        $data['date_time'] = date('Y-m-d H:i:s');
        //       change password as md5 hahsing
        $data['password'] = md5($data['password']);
        /* Remove confirm password field*/
        $data['confirm-password'] = '';
        $data = array_filter($data);
        // If user already exists
        if ($user->check_duplicate_user($data['email_id'])) {
            echo 'duplicate';
        } else {
            //  Register as new user
            if ($user->register_admin($data)) {
                echo 'yes';
            } else {
                echo 'no';
            }
        }
    }
}