Array: Compare values from API with values from own database - php

Question

I have built a list (moviesSeen) where people can save their seen movies.
Now I want to get the director for each movie from an API and then compare which movies have already been seen. The output of the movies works without problems, but I can't get the result from the database (moviesSeen) to match the movies of the director. How can I achieve this?
The goal of the script is to show all movies of a director and mark all the ones you have already seen.
function getCrewDetails() {
global $apiKey;
global $language;
$personID = htmlspecialchars($_GET['personID']);
$url = "https://api.themoviedb.org/3/person/" . $personID . "?api_key=" . $apiKey . "&" . $language . "";// path to your JSON file
$data = file_get_contents($url); // put the contents of the file into a variable
$personPrivate = json_decode($data); // decode the JSON feed
echo '<div class="row">';
echo '<div class="col">';
echo '<img src="https://image.tmdb.org/t/p/w300/' . $personPrivate->profile_path . '" class="img-thumbnail">';
echo '</div>'; // end div col
echo '<div class="col-8">';
echo '<h1>' . $personPrivate->name . '</h1>';
if (!empty($personPrivate->biography)) {
echo $personPrivate->biography;
} else {
echo '<p>Verdammmt! Zu dieser Person liegen keine biographischen Details vor.</p>';
echo '<p>Dabei hätte sie es doch so verdient :(</p>';
}
echo '</div>'; // end div col
echo '</div>'; // end div row
// echo '<pre>';
// print_r($person);
$url = "https://api.themoviedb.org/3/person/" . $personID . "/movie_credits?api_key=" . $apiKey . "&" . $language . "";// path to your JSON file
$data = file_get_contents($url); // put the contents of the file into a variable
$personCareer = json_decode($data); // decode the JSON feed
echo '<div class="container mt-4">';
echo "<h2>Filmographie</h2>";
echo '<table class="table table-striped table-sm">';
echo '<thead>';
echo '<tr>';
echo '<th scope="col">Film</th>';
echo '<th scope="col">Gesehen</th>';
echo '<th scope="col">Funktion</th>';
echo '</tr>';
echo '</thead>';
echo '<tbody>';
global $pdo;
$stmt = $pdo->prepare("SELECT * FROM movieSeen WHERE user_id = '" . $_SESSION['id'] . "'");
$stmt->execute();
foreach ($stmt as $row ) {
echo $row['movie_id'] . ', ';
} // output of the saved IDs in movieSeen
foreach ($personCareer->crew as $showCrewDetails) { //Output of the movies
echo '<tr>';
echo '<td>' . $showCrewDetails->title . ' ' . $showCrewDetails->id . ' (' . substr($showCrewDetails->release_date, 0, 4) . ')</td>';
echo '<td><span class="badge badge-danger">Movie Seen</span></td>';
echo '<td>' . $showCrewDetails->job . '</td>';
echo '</tr>';
}
echo '</tbody>';
echo '</table>';
echo '</div>';
//echo '<pre>';
//var_dump($personCareer);
}
I know that I have to edit the last foreach loop, but I just can't get it to work :(