Example code for pulling the top posts from WordPress API

Implementation.php

<?php $popular = (new WordPressApi())->popular(); ?>
<ul>
<?php foreach ($popular as $post): ?>
    <li><a href=“<?php echo $post->href; ?>”><?php echo $post->title; ?></li>
<?php endforeach; ?>
</ul>

WordPressApi.php

<?php

class WordPressApi
{
    private $site_id = 'your_site_id';
    private $token = 'your_api_token';
    private $baseUrl;
    
    public function __construct()
    {
        $this->baseUrl = 'https://public-api.wordpress.com/rest/v1.1/sites/'.$this->site_id.'/';
    }

    public function popular($period = 'month', $max = 8)
    {
        $data = $this->getJson($this->baseUrl.'stats/top-posts?period='.$period.'&max='.$max);
        foreach ($data->days as $key => $value) {
            $posts = array_filter($value->postviews, function($post){
                return $post->type == 'post';
            });
        }
    }

    public function getJson($url)
    {
        $options = [
            'http' => [
                'ignore_errors' => true,
                'header' => [
                    0 => 'authorization: Bearer '. $this->token,
                ]
            ]
        ];
        $context  = stream_context_create($options);
        $response = file_get_contents($url, false, $context);
        return json_decode( $response );
    }
}

See this post for full explanation:
Get The Most Popular Posts From The WordPress API