Codeigniter show error page instead Exception error - php

Question

this is my code
public function movieInfo($movieId = null) {
// get the data
$movie = $this->repository->load($movieId);
$this->set_title(null);
$data = $this->includes;
$content_data = array(
'movie' => $movie,
);
$data['content'] = $this->load->view('movie/movie_info', $content_data, true);
$this->load->view($this->template, $data);
}
when i browse to http://tmdb.instaplace.me/movie/movieinfo/76341 it shows my page
but when i browse to http://tmdb.instaplace.me/movie/movieinfo/0
it shows a uncaught exception page when error reporting is set to development otherwise it shows a blank page
instead of showing blank page or uncaught exception on development i want to show a page that says "The id does not exist" for example or a 404 page
but my problem is i can't figure it out how to do that, i am using this
php-tmdb wrapper
the $movieId variable is the id from themoviedb.org to find the movie based on the id

Answer 1

if( ! $movie = $this->repository->load($movieId) ){
$this->_showMovieNotFoundFor($movieId) ; }
else{ $this->_showFound($movie) ; }
edit in response to question ====
you have to create the _show methods yourself. the idea is that you are just checking if a movie came back from the database or not. in the controller the simpler you can make your methods the easier it is to maintain. and unless a method in a controller has to be public, always make them private. in codeigniter you can just put an underscore before the method name to make it private. so the code
if( ! $movie = $this->repository->load($movieId)
so if the $movie did NOT come back from database - then go to
$this->_showMovieNotFoundFor($movieId) ;
i included $movieId in case its needed for the error message.
otherwise you got $movie from database so go to
$this->_showFound($movie) ;
where if we just paste your code its going to be something like
function _showFound($movie){
$this->set_title(null);
$data = $this->includes;
$content_data = array(
'movie' => $movie,
);
$data['content'] = $this->load->view('movie/movie_info', $content_data, true);
$this->load->view($this->template, $data);
}