Db class

<?php

class Db {
    public static function getConnection () {
        $paramsPath = ROOT . '/config/db_params.php';
        $params     = include( $paramsPath );

        $dsn = "mysql:host={$params['host']};dbname={$params['db']};charset=utf8";
        $opt = [
            PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION,
            PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC
        ];
        $db  = new PDO($dsn, $params['user'], $params['password'], $opt);

        return $db;
    }
}