left outer join in laravel eloquent code example

Example 1: left join laravel

$users = DB::table('users')
            ->leftJoin('posts', 'users.id', '=', 'posts.user_id')
            ->get();

$users = DB::table('users')
            ->rightJoin('posts', 'users.id', '=', 'posts.user_id')
            ->get();

Example 2: laravel outer join

->join('answers as answers', 'responses.answer_id', '=', 'answers.id', 'left outer')