<?php
$tableofMovie = [
    "Indiana Jones and the Kingdom of the Crystal Skul" => [
        "Harrison Ford",
        "Cate Blanchette",
        "Karen Allen". '<br>'],

    "Indiana Jones and the Last Crusade" => [
        "Harrison Ford",
        "Sean Connery",
        "Denholm Elliott". '<br>'],

    "Indiana Jones and the Temple of Doom"=> [
        "Harrison Ford",
        "Kate Capshaw",
        "Jonathan Ke Quan"],
    ];



foreach($tableofMovie as $nomsMovies=>$actors)
echo 'Dans le film'. ' ' .$nomsMovies. ' ' .'les principaux acteurs sont :'. implode(", ", $actors);