Les tableaux et boucles en php - quest WCS

<?php
$movies = [
    ['title'=>'Indiana Jones et le Royaume du Crâne de Cristal', 'actors' => ['Harrison Ford', 'Cate Blanchett', 'Karen Allen']],
    ['title'=>'Indiana Jones et la Dernière Croisade', 'actors' => ['Harrison Ford', 'Sean Connery', 'Denholm Elliott']],
    ['title'=>'Indiana Jones et le Temple maudit', 'actors' => ['Harrison Ford', 'Kate Capshaw', 'Jonathan Ke Quan']]
];
$result="";
foreach ($movies as $movieKey => $movie) {
    $result .= "Dans le film " . $movie['title'] . ", les principaux acteurs sont : " ;
    foreach ($movie['actors'] as $actorKey => $actor) {
        if($actorKey+1 == count($movie['actors'])){
            $result .= $actor.".".PHP_EOL;
        }else{
            $result .= $actor . ",";
        }
    }
}
echo $result;