Codeigniter, Message: Undefined variable: params Filename: libraries/tmdb.php

I have problem when load a libraries with array $params

=> file libraries 'libraries/tmdb.php'

public function movie_similar($id, $page = 1, $language = NULL, $append = NULL)
{
    $params = array(
        'page'          => $page,
        'language'      => $language,
        'append_to_response'    => $params
    );

    return $this->_call('movie/' . $id . '/similar_movies', $params);
}

=> file controller 'controller/Movie.php'

public function id($id)
{
    if((int)$id > 0){
        $id = $this->uri->segment('3');
        $data['similar'] = $this->tmdb->movie_similar($id,$page=1);
        $this->load->view('movie_view',$data);
    }


}

And I have errors:

A PHP Error was encountered
Severity: Notice
Message: Undefined variable: params
Filename: libraries/tmdb.php
Line Number: 172

Backtrace:

File: E:\xampp\htdocs\master\application\libraries\tmdb.php
Line: 172
Function: _error_handler
File: E:\xampp\htdocs\master\application\controllers\Movie.php
Line: 113
Function: movie_similar
File: E:\xampp\htdocs\master\index.php
Line: 292
Function: require_once

how to fix my problem ?

via Chebli Mohamed