mvc/repository/DbConnect.php

<?php

namespace App\Repository;
use PDO;
use PDOException;

class DbConnect
{
    private static $db;
    private function __clone()
    {
        return true;
    }
    private function __wakeup()
    {
        return true;
    }
    private function __construct()
    {
        $config = (require_once('../config/config.php'))['db'];
        $dsn = "mysql:host={$config['host']};dbname={$config['dbname']};charset={$config['charset']}";
        $opt = [
            PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
            PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
            PDO::ATTR_EMULATE_PREPARES => false
        ];
        try {
            $this->conPdo = new PDO($dsn, $config['login'], $config['pass'], $opt);
        } catch (PDOException $e) {
            die('Подключение не удалось: ' . $e->getMessage());
        }
    }
    public static function getConnect(){
        if (!self::$db) {
            self::$db = new DbConnect();
        }
        return self::$db->conPdo;
    }
}