<?php
function tools_build_pdo(): PDO
{
    $cfg = require __DIR__ . '/../src/config.php';
    $dsn = "mysql:host={$cfg['db_host']};dbname={$cfg['db_name']};charset={$cfg['db_charset']}";
    $options = [
        PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
        PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
    ];

    return new PDO($dsn, $cfg['db_user'], $cfg['db_pass'], $options);
}