Articles model using a pdo wrapper

ArticlesModel.php

<?php
namespace Model;

class Articles
{
    const DB_DSN = "mysql:host=localhost;dbname=DN_NAME_GOES_HERE";
    const DB_USERNAME = 'DB_USER_GOES_HERE';
    const DB_PASSWORD = 'DB_PASSWORD_GOES_HERE';

    public static function find()
    {
        $query = "SELECT * FROM Articles";
        $query_results = self::queryDB($query);
        $query_results = $query_results['results'];
        $articles = [];

        foreach ($query_results as $article) {
            $article['tags'] =  self::getTags($article['id']);
            $articles[] = $article;
        }

        return $articles;
    }

    public static function findbyId($id)
    {
        $query = "SELECT * FROM Articles  WHERE  id = :XXX_ARTICLE_ID";

        $parameters = [
            [
                'key' => "XXX_ARTICLE_ID",
                'value' => $id,
                'kind' => \PDO::PARAM_INT
            ]
        ];

        $article = self::queryDB($query, $parameters);

        if (empty($article['status'])) {
            return $article;
        }

        $article = $article['results'][0];
        $article['tags'] = self::getTags($id);

        return $article;
    }

    private static function queryDB($query, $parameters = array())
    {
        try {

            $pdo = new \PDO(
                self::DB_DSN,
                self::DB_USERNAME,
                self::DB_PASSWORD
            );

            $preparedStatement = $pdo->prepare($query);

            foreach ($parameters as $item) {
                $preparedStatement->bindParam(
                    $item['key'],
                    $item['value'],
                    $item['kind']
                );
            }

            return [
                'status' => $preparedStatement->execute(),
                'results' => $preparedStatement->fetchAll(\PDO::FETCH_ASSOC),
            ];

        } catch (\Exception $e) {
            error_log($e->getMessage());
            exit(1);
        }
    }

    /**
     * @param $id
     * @return array
     */
    public static function getTags($id)
    {
        $query      = "SELECT title FROM articles_tags, Tags
        WHERE  articles_id = :XXX_ARTICLE_ID AND Tags.id = articles_tags.tags_id";
        $parameters = [
            [
                'key'   => "XXX_ARTICLE_ID",
                'value' => $id,
                'kind'  => \PDO::PARAM_INT
            ]
        ];
        $query_result       = self::queryDB($query, $parameters);

        $tags = [];
        foreach ($query_result['results'] as $tag) {
            $tags[] = $tag['title'];
        }

        return $tags;
    }
}