here is my error Warning: foreach() argument must be of type array|object, null given in C:\xampp\htdocs\larasite\index.php on line 54

and here is my code

function filterByProducer($movies, $producer) {

        $filteredMovies = [];

        foreach ($movies as $movie) {
            if ($movie['producer'] === $producer) {

                $filteredMovies[] = $movie;
            }
        }
    }

    
?>

<ul>
    <?php foreach (filterByProducer($movies, 'Esther J. Frank') as $movie) : ?>
        
        <li>
            <a href="<?= $movie['downloadUrl'] ?>">
            <?= $movie['name']; ?> (<?= $movie['releaseYear'] ?>) - <?= $movie['producer'] ?>
        
            </a>
    
        </li>
        

    <?php endforeach; ?>

</ul>

what i'm i doing wrong?

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