classs vs arrays

example.php

<?php

// OLD

class Foo
{
    public function getVideosA($ids)
    {
        $videos = [];
        $list = $this->youtube->videos->listVideos(
            ['statistics,snippet'],
            ['id' => implode(',', $ids), 'maxResults' => count($ids)]
        );

        foreach ($list->items as $item) {
            $videos[$item->id] = [
                'id' => $item->id,
                'title' => $item->snippet->title,
                'views' => $item->statistics->viewCount,
            ];
        }

        return $videos;
    }
}

// NEW

class Video
{
    /** Snippet */
    private $snippet;

    /** Statistics */
    private $statistics;

    public function __construct(int $id, Snippet $snippet, Statistics $statistics)
    {
        $this->id = $id;
        $this->snippet = $snippet;
        $this->statistics = $statistics;
    }

    public function getSnippet(): Snippet
    {
        return $this->snippet;
    }

    public function getStatistics(): Statistics
    {
        return $this->statistics;
    }
}

class Snippet
{
    /** string */
    private $title;

    public function __construct(string $title)
    {
        $this->title = $title;
    }

    public function getTitle(): string
    {
        return $this->title;
    }
}

class Stastistics
{
    /** int */
    private $viewCount;

    public function __construct(int $viewCount)
    {
        $this->viewCount = $viewCount;
    }

    public function getViewCount(): int
    {
        return $this->viewCount;
    }
}

class Bar
{
    /**
     * @param int[] $ids
     * @return Video[]
     */
    public function getVideos(array $ids): array
    {
        $list = $this->youtube->videos->listVideos(
            ['statistics,snippet'],
            ['id' => implode(',', $ids), 'maxResults' => count($ids)]
        );

        return array_reduce(
            $list,
            function (array $carrier, Model $item) {
                return $carrier[$item->id] = new Video(
                    $item->id,
                    new Snippet($item->snippet->title),
                    new Statistics($item->statistics->viewCount)
                );
            },
            []
        );
    }
}